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HiOS-2S/2A/3S RSPE

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1. Con Con Rse Protocol Configuration Information f Bridge Root Topology Bridge ID 4096 008064caffee 4096 008064catfee Bridge is Root Vv Priority 4096 fase o i RootPor bo HeloTimets Po E CC RR Path Cost oO Forward Delay s hs haoo Topology Change Count ea Max Age Bo ooo po Time Since Topology Change 0 day s 0 00 53 Tx Hold Cout fho BPDU Guard E Set Reload Help Figure 41 Device is operating as root bridge show spanning tree global Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE 94 Release 4 0 07 2014 Spanning Tree 6 5 Configuring the device If applicable change the values in the Forward Delay s and Max Age fields The root bridge transmits the changed values to the other devices Operation Protocol Version on off IRSTP Protocol Configuration Information Bridge Root Topology Bridge ID 4096 00 80 64 ca ff ee s096 00 80 64 ca ff ee Bridge is Root Iv Priority a096 ba s096 Root Port jo Hello Time s 2 2 Root Path Cost f Forward Delay s 15 fs Topology Change Count 2 Max Age bo 20 Time Since Topology Change fo day s 0 05 51 Tx Hold Count fi 0 BPDU Guard Iv e6 Figure 42 Changing Forward Delay and Max Age O Click Set to save the changes Sspanning tree forward time Specifies the delay time for the status change in L4 seas seconds spanning tree max age Specifies the maximum permissible branch LOs s40
2. Figure 23 PRP LRE process The LRE has the following tasks Handling of duplicates Management of redundancy When transmitting packets from the upper protocol layers the LRE sends them from both ports at nearly the same time The 2 data packets pass through the LANs with different delays When the device receives the first data packet the LRE forwards it to the upper protocol layers and discards the second data packet received For the upper protocol layers the LRE behaves like a normal port To identify the twin packets the LRE attaches an RCT with a sequential number to the packets The LRE also periodically sends multicast PRP Supervision packets and evaluates the multicast PRP supervision packets of the other RedBoxes and DANPs UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 4T Parallel Redundancy Protocol PRP 4 2 LRE Functionality The device allows you to view the received supervision packet entries The entries in the Switching gt L2 Redundancy gt PRP gt DAN VDAN Table are helpful for detecting redundancy and connection problems For example in an index when the Last Seen B timestamp resets and the Last Seen A timestamp remains the same The Last Seen A and Last Seen B time stamps steadily reseting indicate a normal condition Note According to IEC 62439 the Entry Forget Time is 400 ms The Entry Forget Time is the time after which the device removes an entry from the duplicate table When the de
3. HSR Network Structure 5 2 1 Connecting SANs to an HSR Network 5 2 2 HSR and PRP network connections Spanning Tree Basics O ak The tasks of the STP 2 Bridge parameters 3 Bridge Identifier 4 Root Path Cost o Port Identifier 6 Max Age and Diameter es WH O gt O O O O ZC A A les for Creating the Tree Structure Bridge information Setting up the tree structure x lt amp SSNs Example of determining the root path Example of manipulating the root path 1 2 mples 1 2 3 Example of manipulating the tree structure gt W W W e Rapid Spanning Tree Protocol Port roles Port states Spanning Tree Priority Vector Fast reconfiguration STP compatibility mode MAOMOMMDA DOOM MO Pacer ORWN Configuring the device Guards 6 6 1 Activating the BPDU Guard 6 6 2 Activating Root Guard TCN Guard Loop Guard Link Aggregation Methods of Operation Link Aggregation Example 104 107 109 111 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Contents 8 2 9 1 9 2 MRP over LAG Network Structure 8 1 1 LAG ona single segment of an MRP ring 8 1 2 LAG on an entire MRP ring 8 1 3 Detecting interruptions on the ring Example Configuration Link Backup Fail Back Description Example Configuration Readers Comments Index Further Support UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 113 114 114 115 116 117 121 12
4. show spanning tree global Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE 92 Release 4 0 07 2014 Spanning Tree 6 5 Configuring the device L Now connect the redundant lines Define the settings for the device that takes over the role of the root bridge In the Priority field you enter a numerically lower value The bridge with the numerically lowest bridge ID has the highest priority and becomes the root bridge of the network Operation Protocol Version on off IRSTP Protocol Configuration Information Bridge Root Topology Bridge ID 32768 00 80 64 ca ff ee 20480 00 80 63 Of 1d b0 Bridge is Root E Priority Root Port hs o HeloTimets 2 2 o RootPath Cost ooo Forward Delay s hs fo oo Topology Change Count bo Max Age po ooo 6 Time Since Topology Change 0 day s 0 35 34 Tx Hold Count fi 0 BPDU Guard Iv Set Reload Help Figure 40 Defining the bridge priority Click Set to save the changes spanning tree mst priority 0 Defines the bridge priority of the device lt 0 61440 in 4096er Schritten gt UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 93 Spanning Tree 6 5 Configuring the device After saving the dialog shows the following information The Bridge is Root checkbox is marked The Root Port field shows the value 0 0 The Root Path Cost field shows the value 0 Protocol Version Operation
5. To remove the entry in the statistics table click Reset L To load the current statistics click Reload The device allows you to view the received supervision packet entries The entries in the Switching gt L2 Redundancy gt PRP gt DAN VDAN Table are helpful for detecting redundancy and connection problems For example in an index when the Last Seen B timestamp resets and the Last Seen A timestamp remains the same The Last Seen A and Last Seen A time stamps steadily reseting indicate a normal condition O OOO O OL UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 53 Parallel Redundancy Protocol PRP 4 5 Example Configuration Note If you deactivate the PRP function then deactivate either Port A or B to help prevent network loops 04 enable configure no mrp operation no spanning tree operation interface 1 1 no shutdown exit interface 1 2 no shutdown exit prp instance 1 supervision evaluate prp instance 1 supervision send prp instance 1 supervision redbox exclusively prp operation show prp counters show prp node table show prp proxy node table Switch to the privileged EXEC mode Switch to the Configuration mode Disable the option Disable the option Change to the Interface Configuration mode of port 1 1 Enable the interface Switch to the Configuration mode Switch to the interface configuration mode for interface 1 2 Enable the interfa
6. Spanning Tree 6 6 Guards if an edge port receives an STP BPDU the device behaves as follows The device deactivates this port Inthe Basic Settings gt Port dialog Configuration tab the checkbox in the Port on column is not marked for this port gt The device designates the port In the Switching gt L2 Redundancy gt Spanning Tree gt Port dialog Guards tab the device shows the value enable in the BPDU Guard Effect column CIST Guards Root TCN Loop Loop Trans Trans BPDU Guard Guard Guard State into Loop out of Loop Guard Effect YO aaa YO Aaa OA AA aaa Set Reload Help Figure 46 Switching gt L2 Redundancy gt Spanning Tree gt Port dialog Guards tab show spanning tree port x y Displays the parameters of the port for checking The value of the BPDU Guard Effect parameter IS enable UM RedundConfig HiOS 2S 2A 3S RSPE 102 Release 4 0 07 2014 Spanning Tree 6 6 Guards To reset the status of the device port to the value forwarding you proceed as follows L If the device port is still receiving BPDUs Remove the manual definition as an edge port or Deactivate the BPDU Guard Activate the device port again UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 103 Spanning Tree 6 6 Guards 6 6 2 Activating Root Guard TCN Guard Loop Guard UM RedundConfig HiOS 2S 2A 3S RS
7. each bridge and its connections are uniquely described by the following parameters Bridge Identifier Root Path Cost for the bridge ports Port Identifier 6 1 3 Bridge Identifier The Bridge Identifier consists of 8 bytes The 2 highest value bytes are the priority The default setting for the priority number is 32 768 but the Management Administrator can change this when configuring the network The 6 lowest value bytes of the bridge identifier are the bridge s MAC address The MAC address allows each bridge to have unique bridge identifiers The bridge with the smallest number for the bridge identifier has the highest priority MSB LSB oj oj of 8 n o _ _ jx qq_ lt cw Priority MAC Address Figure 29 Bridge Identifier Example values in hexadecimal notation UM RedundConfig HiOS 2S 2A 3S RSPE 12 Release 4 0 07 2014 Spanning Tree 6 1 Basics 6 1 4 Root Path Cost Each path that connects 2 bridges is assigned a cost for the transmission path cost The Switch determines this value based on the transmission speed see table 4 It assigns a higher path cost to paths with lower transmission speeds Alternatively the Administrator can set the path cost Like the Switch the Administrator assigns a higher path cost to paths with lower transmission speeds However since the Administrator can choose this value freely he has a tool with which he can give a certain path an advantage among redundant paths
8. flag Switches the Loop Guard on ata root alternate or backup port Leaves the interface mode Displays the parameters of the port for checking UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Link Aggregation 7 Link Aggregation Link Aggregation using the single switch method helps you overcome 2 limitations with ethernet links namely bandwidth and redundancy The first problem that the Link Aggregation Group LAG function helps you with is bandwidth limitations of individual ports LAG allows you to combine 2 or more links in parallel creating 1 logical link between 2 devices The parallel links increase the bandwidth for traffic between the 2 devices You typically use Link Aggregation on the network backbone The function provides you an inexpensive way to incrementally increase bandwidth Furthermore Link Aggregation provides for redundancy with a seemless failover With 2 or more links configured in parallel when a link goes down the other links in the group continue to forward traffic The device uses a hash option to determine load balancing across the port group Tagging the egress traffic allows the device to transmit associated packets across the same link The default settings for a new Link Aggregation instance are as follows Hashing Option in the Configuration frame is sourceDestMacVlan Active is marked Link Trap is enabled Static Link Aggregation is disabled Hashing Option for new tru
9. 128 It also applies here that the port with the smallest number for the port identifier has the highest priority MSB LSB Priority Port number Figure 31 Port Identifier UM RedundConfig HiOS 2S 2A 3S RSPE 14 Release 4 0 07 2014 Spanning Tree 6 1 Basics 6 1 6 Max Age and Diameter The Max Age and Diameter values largely determine the maximum expansion of a Spanning Tree network Diameter The number of connections between the devices in the network that are furthest removed from each other is known as the network diameter Figure 32 Definition of diameter The network diameter that can be achieved in the network is MaxAge 1 In the state on delivery MaxAge 20 and the maximum diameter that can be achieved 19 If you set the maximum value of 40 for MaxAge the maximum diameter that can be achieved 39 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 15 Spanning Tree 6 1 Basics MaxAge Every STP BPDU contains a MessageAge counter When a bridge is passed through the counter increases by 1 Before forwarding a STP BPDU the bridge compares the MessageAge counter with the MaxAge value defined in the device If MessageAge lt MaxAge the bridge forwards the STP BPDU to the next bridge If MessageAge MaxAge the bridge discards the STP BPDU Root Bridge gt MaxAge 5 Message Ton a E ee Figure 33 Transmission of an STP BPDU depending
10. 5 2 HSR Network Structure I O To update the table entries click Reload 62 The device detects errors and displays them according to MIB Managed Objects and the respective link Open the switching gt L2 Redundancy gt HSR gt Statistics dialog to view the quality of the traffic that traverses the device To remove the entry in the statistics table click Reset To load the current statistics click Reload enable configure no mrp operation no spanning tree operation interface 1 1 no shutdown exit interface 1 2 no shutdown exit hsr instance 1 mode modeu hsr instance 1 port a hsr instance 1 port b hsr instance 1 switching node type hsrredboxsan hsr instance 1 supervision evaluate hsr instance 1 supervision send hsr instance 1 supervision redbox exclusively hsr operation show hsr counters Another possibility is to configure the host HSR RedBox 1 using the following CLI commands Switch to the privileged EXEC mode Switch to the Configuration mode Disable the option Disable the option Change to the Interface Configuration mode of port 1 1 Enable the interface Switch to the Configuration mode Switch to the interface configuration mode for interface 1 2 Enable the interface Switch to the Configuration mode The HSR host forwards unicast traffic to the connected VDANSs and around the ring Activate the HSR Port A Activate the HSR Port B Enable the devic
11. Admin Key Max Delay ys Port Status Active Admin Key 2 dynamic 1518 38 sourceDestMacVlan 4 1 p set Reload Create Remove AddPors To temporarily save the changes click Set Open the Switching gt L2 Redundancy gt MRP dialog L Using the pull down menu in the Port field of the Ring Port 2 frame select lag 1 UM RedundConfig HiOS 2S 2A 3S RSPE 118 Release 4 0 07 2014 MRP over LAG HiOS 2A HiOS 3S 8 2 Example Configuration Operation On Off Ring Port 1 Ring Port 2 Port 1 3 v Port lag 1 v Operation forwarding Operation forwarding Configuration Ring Manager On Off Advanced Mode Iv Ring Recovery 500ms 200ms 30ms 10ms VLAN ID 0 Information Set Reload Delete ring configuration Q Help L To temporarily save the changes click Set To permanently save the changes you open the Basic Settings gt Load Save dialog and click Save enable configure link aggregation add lag 1 link aggregation modify lag 1l addport 1 1 link aggregation modify lag 1l addport 1 2 mrp domain modify port secondary lag 1l copy Config running Config nvm UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Switch to the privileged EXEC mode Switch to the Configuration mode Create a Link Aggregation group lag 1 Adds port 1 1 to the Link Aggregation Group Adds port 1 2 to the Link Aggregation Group Defi
12. HSR ring also offers zero recovery time HSR is suited for applications that demand high availability and short reaction times For example protection applications for electrical station automation and control lers for synchronized drives which require constant connection Note If HSR is active it uses the interfaces 1 1 and 1 2 As seen in the Switching gt Rate Limiter and Switching gt Filter for MAC Addresses dialogs the HSR function replaces the interfaces 1 1 and 1 2 with the inter face hsr 1 Set up the VLAN membership and the rate limiting for the inter face hsr 1 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 57 High availability Seamless Redun 5 1 Implementation dancy HSR 5 1 Implementation HSR Redundancy Boxes RedBox use 2 Ethernet ports operating in parallel to connect to a ring An HSR RedBox operating in this configuration is a Doubly Attached Node implementing the HSR protocol DANH A standard ethernet device connected to the HSR ring through an HSR RedBox is a Virtual DANH VDANH As with PRP the transmitting HSR Node or HSR RedBox sends twin frames 1 in each direction on the ring For identification the HSR Node injects the twins with an HSR tag The HSR tag consists of a port identifier the length of the payload and a sequence number In a normal operating ring the desti nation HSR Node or RedBox receives both frames within a certain time skew An HSR node forwards the first frame to arriv
13. Release 4 0 07 2014 MRP over LAG HIOS 2A HiOS 3S 8 MRP over LAG HiOS 2A HiOS 3S Hirschmann devices allow you to combine Link Aggregation Groups LAG to increase bandwidth with the Media Redundancy Protocol MRP providing redundancy The function allows you to increase the bandwidth on individual segments or on the entire network The LAG function helps you overcome bandwidth limitations of individual ports LAG allows you to combine 2 or more links in parallel creating 1 logical link between 2 devices The parallel links increase the bandwidth for the data stream between the 2 devices For a detailed description of the LAG function see Link Aggregation on page 107 An MRP ring consists of up to 50 devices that support the MRP protocol according to IEC 62439 If you use only Hirschmann devices then the protocol allows you to configure MRP rings with up to 100 devices Fora detailed description of the MRP protocol see Media Redundancy Protocol MRP on page 17 You use MRP over LAG in the following cases to increase bandwidth only on specific segments of an MRP ring to increase bandwidth on the entire MRP ring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 113 MRP over LAG HiOS 2A HiOS 3S 8 1 Network Structure 8 1 Network Structure When configuring an MRP ring with LAGs the Ring Manager RM monitors both ends of the backbone for continuity The RM blocks data on the secondary redundant port as
14. The root path cost is the sum of all individual costs of those paths that a data packet has to traverse from a connected bridge s port to the root bridge PC 200000 PC 200000000 PC Path costs Ethernet 100 Mbit s Ethernet 10 Mbit s Figure 30 Path costs Data rate Recommended value Recommended range Possible range lt 100 Kbit s 200 000 000 20 000 000 200 000 000 1 200 000 000 1 Mbit s 20 000 000 2 000 000 200 000 000 1 200 000 000 10 Mbit s 2 000 000 200 000 20 000 000 1 200 000 000 100 Mbit s 200 000 20 000 2 000 000 1 200 000 000 1 Gbit s 20 000 2 000 200 000 1 200 000 000 10 Gbit s 2 000 200 20 000 1 200 000 000 100 Gbit s 200 20 2 000 1 200 000 000 1 TBit s 20 2 200 1 200 000 000 10 TBit s 2 1 20 1 200 000 000 Table 4 Recommended path costs for RSTP based on the data rate UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 13 Spanning Tree 6 1 Basics a Bridges that conform with IEEE 802 1D 1998 and only support 16 bit values for the path costs should use the value 65 535 FFFFH for path costs when they are used in conjunction with bridges that support 32 bit values for the path costs 6 1 5 Port Identifier The port identifier consists of 2 bytes One part the lower value byte contains the physical port number This provides a unique identifier for the port of this bridge The second higher value part is the port priority which is specified by the Administrator default value
15. as participants in an MRP ring Configure the transmission rate and the duplex mode for the ring ports in accordance with the following table Port type Bit rate Autonegotiation Port setting Duplex automatic configuration TX 100 Mbit s off on 100 Mbit s full duplex FDX TX 1 Gbit s on on Optical 100 Mbit s off on 100 Mbit s full duplex FDX Optical 1 Gbit s on on Optical 10 Gbit s on 10 Gbit s full duplex FDX Table 3 Port settings for subring ports The following steps contain additional settings for subring configuration To help prevent loops during configuration deactivate the Subring Manager function on the main ring and subring devices After you completely configure every device participating in the main ring and subrings activate the global Subring function and Subring Managers Disable the RSTP function on the MRP ring ports used in the subring Verify that the Link Aggregation function is inactive on ports participating in the main ring and subring UM RedundConfig HiOS 2S 2A 3S RSPE 40 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S Specify a different VLAN membership for the main ring ports and subring ports even if the main ring is using the MRP protocol For example use VLAN ID 1 for the main ring and the redundant link then use VLAN ID 2 for the subring For the devices participating in the main ring for example open the Switching gt VLAN g
16. gt length i e the number of devices to the root bridge show spanning tree global Displays the parameters for checking Note The parameters Forward Delay s and Max Age have the following relationship Forward Delay s 2 Max Age 2 1 If you enter values in the fields that contradict this relationship the device replaces these values with the last valid values or with the default value UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 95 Spanning Tree 6 5 Configuring the device Note If possible do not change the value in the Hello Time field Check the following values in the other devices Bridge ID bridge priority and MAC address of the corresponding device and the root bridge Number of the device port that leads to the root bridge Path cost from the root port of the device to the root bridge Operation Protocol Version fon Off IRSTP Protocol Configuration Information Bridge Root Topology Bridge ID s2768 00 80 64 ca ff ee 4096 00 80 63 51 7400 Bridge is Root E Priority 32768 s096 Root Port fi 5 Hello Time s 2 2 Root Path Cost 240000 Forward Delay s fi 5 fi 5 Topology Change Count fi Max Age 20 20 Time Since Topology Change fo day s 0 01 54 Tx Hold Count fi 0 BPDU Guard E Set Reload Help Figure 43 Check values show spanning tree global Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE 96 Release 4 0 07 20
17. h HIRSCHMANN A BELDEN BRAND User Manual Redundancy Configuration Rail Switch Power Enhanced HiOS 2S 2A 3S RSPE UM RedundConfig HiOS 2S 2A 3S RSPE Technical Support Release 4 0 07 2014 https hirschmann support belden eu com The naming of copyrighted trademarks in this manual even when not specially indicated should not be taken to mean that these names may be considered as free in the sense of the trademark and tradename protection law and hence that they may be freely used by anyone 2014 Hirschmann Automation and Control GmbH Manuals and software are protected by copyright All rights reserved The copying reproduction translation conversion into any electronic medium or machine scannable form is not permitted either in whole or in part An exception is the preparation of a backup copy of the software for your own use For devices with embedded software the end user license agreement on the enclosed CD DVD applies The performance features described here are binding only if they have been expressly agreed when the contract was made This document was produced by Hirschmann Automation and Control GmbH according to the best of the company s knowledge Hirschmann reserves the right to change the contents of this document without prior notice Hirschmann can give no guarantee in respect of the correctness or accuracy of the information in this document Hirschmann can accept no responsibility for damages resulting from the
18. long as the backbone is intact If the RM detects an interruption of the data stream on the ring then it begins forwarding data on the secondary port which restores backbone continuity You use LAG instances in MRP rings to increase bandwidth only in this case MRP provides the redundancy In order for the RM to detect an interruption on the ring MRP requires a device to block every port in the LAG instance when a port in the instance is down 8 1 1 LAG ona single segment of an MRP ring The device allows you to configure a LAG instance on specific segments of an MRP ring You use the LAG Single Switch method for devices in the MRP ring The Single Switch method provides you an inexpensive way to grow your network by using only 1 device on each side of a segment to provide the physical ports You group the ports of the device into a LAG instance to provide increased bandwidth on specific segments where needed UM RedundConfig HiOS 2S 2A 3S RSPE 114 Release 4 0 07 2014 MRP over LAG HiOS 2A HiOS 3S 8 1 Network Structure Link RM Agregation Be a e By g Figure 50 Link Aggregation over a single link of an MRP ring 8 1 2 LAG on an entire MRP ring Besides being able to configure a LAG instance on specific segments of an MRP ring Hirschmann devices also allow you to configure LAG instances on every segment which increases bandwidth on the entire MRP ring Figure 51 Link Aggregation over the entire MRP ring UM RedundCo
19. the Supervision Packet Transmitter frame L To transmit packets for VDANSs listed in the Switching gt L2 Redundancy gt HSR gt DAN VDAN Table dialog activate Send VDAN Packets Use the following steps to configure HSR RedBox 1 To configure the device to forward unicast traffic around the ring and to the destination device set the HSR Mode to modeu To configure the device as an HSR host set t Switching Node Type to hsrredboxsan Note Setting Switching Node Type to hsrredboxsan disables the Redbox Identity function L To enable the ports in the Port Port A and Port Port B frames click On L To disable the HSR function in the Operation frame click On 1 To save your changes in the volatile memory click Set To load the configuration saved in the volatile memory click Reload Open the Switching gt L2 Redundancy gt HSR gt DAN VDAN Table dialog to view the traffic received from the LAN This information helps you in detecting how the LANs are functioning To remove this list click Reset I To update the table entries click Reload 1 Open the Switching gt L2 Redundancy gt HSR gt Proxy Node Table dialog to view the terminating VDAN devices for which this device provides HSR conversion To remove the entries in the proxy table click Reset UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 61 High availability Seamless Redun dancy HSR
20. the port with the better port ID UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 85 Spanning Tree 6 4 The Rapid Spanning Tree 86 Protocol Edge port Every network segment with no additional RSTP bridges is connected with exactly one designated port In this case this designated port is also an edge port The distinction of an edge port is the fact that it does not receive any RST BPDUs Rapid Spanning Tree Bridge Protocol Data Units Alternate port This is a blocked port that takes over the task of the root port if the connection to the root bridge is lost The alternate port provides a backup connection to the root bridge Backup port This is a blocked port that serves as a backup in case the connection to the designated port of this network segment without any RSTP bridges is lost Disabled port This is a port that does not participate in the Spanning Tree Operation i e the port is switched off or does not have any connection UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Spanning Tree 6 4 The Rapid Spanning Tree Protocol BID 16384 1 BID 20480 BID 24576 P BID Priority of the bridge identifikation BID BID without MAC Address Root path Interrupted path C Root port Designated port ll Alternate port lll Backup port lt Edge port Figure 38 Port role assignment UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 87 Spanning Tree 6 4 T
21. to a dependency Courier ASCII representation in the graphical user interface O Execution in the Graphical User Interface Execution in the Command Line Interface Symbols used WLAN access point Router with firewall Switch with firewall Router Switch UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 11 A ey o D D 12 Bridge Hub A random computer Configuration Computer Server PLC Programmable logic controller I O Robot UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Network Topology vs Redundancy Protocols 1 Network Topology vs Redundancy Protocols When using Ethernet an important prerequisite is that data packets follow a single unique path from the sender to the receiver The following network topologies support this prerequisite Line topology Star topology Tree topology Figure 1 Network with line star and tree topologies To ensure that the communication is maintained when a connection fails you install additional physical connections between the network nodes Redun dancy protocols ensure that the additional connections remain switched off while the original connection is still working If the connection fails the redun dancy protocol generates a new path from the sender to the receiver via the alternative connection To introduce redundancy onto layer 2 of a network you first define which network topolog
22. use a VLAN You have entered 200 ms as the ring recovery time and all the devices support the advanced mode of the ring manager L Set up the network to meet your demands Configure all ports so that the transmission speed and the duplex settings of the lines correspond to the following table UM RedundConfig HiOS 2S 2A 3S RSPE 22 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 5 Example Configuration Port type Bit rate Autonegotiation Port setting Duplex automatic configuration TX 100 Mbit s off on 100 Mbit s full duplex FDX TX 1 Gbit s on on Optical 100 Mbit s off on 100 Mbit s full duplex FDX Optical 1 Gbit s on on Table 2 Port settings for ring ports Note You configure optical ports without support for autonegotiation auto matic configuration with 100 Mbit s full duplex FDX or 1000 Mbit s full duplex FDX UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 23 Media Redundancy Protocol MRP 2 5 Example Configuration Note Configure all the devices of the MRP Ring individually Before you connect the redundant line you must have completed the configuration of all the devices of the MRP Ring You thus avoid loops during the configuration phase You deactivate the flow control on the participating ports If the flow control and the redundancy function are active at the same time there is a risk that the redundancy function will not operate as intended Default setting flow control deac
23. with the subring ID 1 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 43 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S sub ring modify 1 port 1 3 Defines port 3 in module 1 as the subring port sub ring modify 1 name Test Assigns the name Test to subring 1 sub ring modify 1 mode Configures the mode of this Subring Manager as manager manager show sub ring ring Displays the subrings state on this device show sub ring global Displays the subring global state on this device L Configure the 2nd Subring Manager in the same way specify Subring Manager 2 as redundant manager in accordance with the figure depicting this example O To activate the Subring Managers mark the Active checkbox in the appropriate rows After you have configured both Subring Managers and the devices participating in the subring enable the Operation and close the redundant link 1 To temporarily save the changes click Set To permanently save the changes you open the Basic Settings gt Load Save dialog and click Save enable Switch to the privileged EXEC mode configure Switch to the Configuration mode sub ring modify 1 operation Activates the subring with the subring ID 1 enable sub ring modify 2 operation Activates the subring with the subring ID 2 enable exit Switch to the privileged EXEC mode show sub ring ring Displays the subrings state on this device show sub ring global Displays the s
24. 14 Spanning Tree 6 6 Guards 6 6 Guards The device allows you to activate various protection functions guards on the device ports The following protection functions help protect your network from incorrect configurations loops and attacks with STP BPDUs BPDU Guard for manually defined terminal device ports edge ports You activate this protection function globally in the device Root BPDU ous Terminal device ports do not normally receive any STP BPDUs If an attacker still attempts to feed in STP BPDUs at this port the device deac tivates the device port Root Guard for designated ports You activate this protection function separately for every device port UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 97 Spanning Tree 6 6 Guards Root x ostile root If a designated port receives an STP BPDU with better path information to the root bridge the device discards the STP BPDU and sets the trans mission state of the port to discarding instead of root If there are no STP BPDUs with better path information to the root bridge after 2 x Hello Time the device resets the state of the port to a value according to the port role TCN Guard for ports that receive STP BPDUs with a Topology Change flag You activate this protection function separately for every device port Root UM RedundConfig HiOS 2S 2A 3S RSPE 98 Release 4 0 07 2014 Spanning Tree 6 6 Guards If the protectio
25. 3 124 126 129 131 Contents UM RedundConfig HiOS 2S 2A 3S RSPE 6 Release 4 0 07 2014 Safety instructions Safety instructions A WARNING UNCONTROLLED MACHINE ACTIONS To avoid uncontrolled machine actions caused by data loss configure all the data transmission devices individually Before you start any machine which is controlled via data transmission be sure to complete the configuration of all data transmission devices Failure to follow these instructions can result in death serious injury or equipment damage UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 T Safety instructions UM RedundConfig HiOS 2S 2A 3S RSPE 8 Release 4 0 07 2014 About this Manual About this Manual The GUI reference manual contains detailed information on using the graphical interface to operate the individual functions of the device The Command Line Interface reference manual contains detailed informa tion on using the Command Line Interface to operate the individual functions of the device The Installation user manual contains a device description safety instruc tions a description of the display and the other information that you need to install the device The Basic Configuration user manual contains the information you need to start operating the device It takes you step by step from the first startup oper ation through to the basic settings for operation in your environment T
26. D lo Information m Set Reload Delete ring configuration Help Figure 8 Defining the ring ports In the Command Line Interface you first define an additional parameter the MRP domain ID Configure all the ring participants with the same MRP domain ID The MRP domain ID is a sequence of 16 number blocks 8 bit values When configuring with the graphical user interface the device uses the default value 255 255 255 255 255 255 255 255 255 255 255 255 ZOD ZOD Zoo ZOU mrp domain add default domain Creates anew MRP domain with the default domain ID mrp domain modify port Defines port 1 1 as ring port 1 primary primary 1 1 mro domain modiry port Defines port 1 2 as ring port 2 Secondary secondary 1 2 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 25 Media Redundancy Protocol MRP 2 5 Example Configuration 26 Activate the ring manager For the other devices in the ring leave the setting as Off Operation Con Off Ring Port 1 Ring Port 2 es Ce Operation notConnected Operation notConnected Configuration Ring Manager fon off Advanced Mode E Ring Recovery C 500ms 200ms LAN ID OO information L Set Reload Delete ring configuration Help Figure 9 Activating the ring manager mrp domain modify mode Defines the device as the ring manager Do not manager activate the ring manager on any other device UM RedundConfig
27. HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Media Redundancy Protocol MRP 2 5 Example Configuration L Select the checkbox in the Advanced Mode field Figure 10 Activating the advanced mode mrp domain modify Activates the advanced mode advanced mode enabled UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 27 Media Redundancy Protocol MRP 2 5 Example Configuration In the Ring Recovery field select the value 200ms Operation On Off Ring Port 1 Ring Port 2 Port a4 Port 1 2 Operation nctConnected Operation notConnectea Configuration Ring Manager on off Advanced Mode Iw VLAN ID OO Information Set Reload Delete ring configuration Help Figure 11 Defining the time for the ring recovery mrp domain modify Defines 200ms as the max delay time for the recovery delay 200ms reconfiguration of the ring Note If selecting 200 ms for the ring recovery does not provide the ring Stability necessary to meet the requirements of your network you select 500 ms You will find further information about setting the MRP VLAN ID in the figure Changing the VLAN ID on page 32 UM RedundConfig HiOS 2S 2A 3S RSPE 28 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 5 Example Configuration L Switch the operation of the MRP Ring on Operation Ring Port 1 Ring Port 2 Port fia Port 12 Operation notConnected Operation JnotConnected Configuratio
28. MAC address has the numerically higher ID which is logically the worse one If multiple paths with the same root path costs lead from one bridge to the same bridge the bridge further away from the root uses the port identifier of the other bridge as the last criterion see figure 31 In the process the bridge blocks the port that leads to the port with the numerically higher ID a numerically higher ID is the logically worse one If 2 ports have the same priority the port with the higher port number has the numerically higher ID which is logically the worse one UM RedundConfig HiOS 2S 2A 3S RSPE 18 Release 4 0 07 2014 Spanning Tree 6 2 Rules for Creating the Tree structure Determine root path Equal Path with lowest path costs path costs root path Path with highest priority numerically lower value in bridge identification root path Equal priority in bridge identification Use the bridge with lowest MAC address designated bridge Equal Path with highest port priority port priority numerically lower value root path Path with lowest port number of designated bridge root path Root path determined Figure 34 Flow diagram for specifying the root path UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 19 Spanning Tree 6 3 Examples 6 3 Examples 6 3 1 Example of determining the root path You can use the network plan see figure 35 to follow the flow chart
29. OS 2S 2A 3S RSPE Release 4 0 07 2014 Media Redundancy Protocol MRP 2 2 Reconfiguration time 2 2 Reconfiguration time If a line section fails the ring manager changes the MRP Ring back into a line structure You define the maximum time for the reconfiguration of the line in the ring manager Possible values for the maximum delay time 500 ms 200 ms 30 ms 10 ms The delay times 30ms and 10ms are only available to you for devices with hardware for enhanced redundancy functions In order to use these fast delay times load the Fast MRP device software Configure the delay time to 10ms when you use up to 20 devices in the ring that support this delay time When you use more than 20 of these devices in the ring configure a delay time to at least 30ms Note You only configure the reconfiguration time with a value less than 500 ms if all the devices in the ring support the shorter delay time Otherwise the devices that only support longer delay times might not be reachable due to overloading Loops can occur as a result UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 19 Media Redundancy Protocol MRP 2 3 Advanced mode 2 3 Advanced mode For times even shorter than the guaranteed reconfiguration times the device provides the advanced mode The advanced mode speeds up the link failure recognition when the ring participants inform the ring manager of interrup tions in the ring via link down notifications Hirschm
30. P BID 32768 Interrupted path Figure 36 Example of manipulating the root path UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 83 Spanning Tree 6 3 Examples 6 3 3 Example of manipulating the tree structure The Management Administrator soon discovers that this configuration with bridge 1 as the root bridge see on page 80 Example of determining the root path is invalid On the paths from bridge 1 to bridge 2 and bridge 1 to bridge 3 the control packets which the root bridge sends to all other bridges add up If the Management Administrator configures bridge 2 as the root bridge the burden of the control packets on the subnetworks is distributed much more evenly The result is the configuration shown here see figure 37 The path costs for most of the bridges to the root bridge have decreased Root Bridge P BID 16 384 Ed P BID 32768 P BID 32768 P BID 32768 P BID 32768 Port 2 jx Xf Jx l Port 1 MAC 00 01 02 03 04 0 l l l P BID 32768 P BID 32768 5 Jx MAC 00 01 02 03 04 06 P BID Priority of the bridge identifikation BID BID without MAC Address Root path Interrupted path Figure 37 Example of manipulating the tree structure UM RedundConfig HiOS 2S 2A 3S RSPE 84 Release 4 0 07 2014 Spanning Tree 6 4 The Rapid Spanning Tree Protocol 6 4 The Rapid Spanning Tree Protocol The RSTP uses the same algorithm for determini
31. PE 104 Release 4 0 07 2014 Spanning Tree 6 6 Guards Open the Switching gt L2 Redundancy gt Spanning Tree gt Port dialog Switch to the Guards tab For designated ports select the checkbox in the Root Guard column For ports that receive STP BPDUs with a Topology Change flag select the checkbox in the TCN Guard column For root alternate or backup ports mark the checkbox in the Loop Guard column O OF UU O CIST Guards ards Root ion ine Loop Trans Trans BPDU Guard Guard Guard State into Loop out of Loop Guard Effect Taga Ta OAT ASA Set Reload Figure 47 Activating Guards Note The Root Guard and Loop Guard functions are mutually exclusive If you switch on the Root Guard function while the Loop Guard function is switched on the device switches off the Loop Guard function Click Set to save the changes UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 105 Spanning Tree 106 enable configure interface x y Spanning tree guard root Spanning tree guard tcn Sspanning tree guard loop exit show spanning tree port x y 6 6 Guards Switch to the privileged EXEC mode Switch to the Configuration mode Switches to the interface mode Switches the Root Guard on at the designated port Switches on the TCN Guard on the port that receives STP BPDUs with a Topology Change
32. R ring or PRP LANs to an HSR ring 5 2 1 Connecting SANs to an HSR Network Standard ethernet devices such as maintenance laptops or printers have 1 network interface Therefore standard ethernet devices transmit traffic across an HSR ring through an HSR RedBox which acts as a proxy for the ethernet devices attached to it The HSR RedBox interfaces transmit 1 twin in each direction around the network The host HSR RedBox forwards the first unicast frame to the destination VDANH exclusively and discards the second unicast frame when it arrives The HSR Nodes and RedBoxes forward multicast and broadcast traffic around the ring and also to the connected VDANH devices To help prevent the traffic from endlessly looping around the ring the node originally trans mitting the traffic on the network discards the transmitted frames when received UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 59 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR Figure 27 Connecting a VDANH to an HSR network SAN Device Connection Example Configuration A simple HSR network consists of 3 HSR devices as seen in the previous figure The following example configures a host HSR RedBox for standard ethernet devices Deactivate STP on the PRP ports or globally Also deactivate MRP on the PRP ports or configure MRP on ports other than the PRP ports O UO UO 0 0 0 UU Open the switching gt L2 Redundancy gt MRP dialog T
33. RP dialog Define egress rules see Switching gt VLAN gt Configuration dialog U untagged for the ring ports of VLAN 1 if the device transmits the MRP data packets untagged VLAN ID 0 inthe Switching gt L2 Redundancy gt MRP dialog the MRP ring is not assigned to a VLAN T tagged for the ring ports of the VLAN which you assign to the MRP ring Select T if the device transmits the MRP data packets ina VLAN VLAN ID 2 1 in the Switching gt L2 Redundancy gt MRP dialog You will find further information about setting the MRP VLAN ID in the figure Changing the VLAN ID on page 32 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 21 Media Redundancy Protocol MRP 2 5 Example Configuration 2 5 Example Configuration A backbone network contains 3 devices in a line structure To increase the availability of the network you convert the line structure to a redundant ring structure Devices from different manufacturers are used All devices support MRP On every device you define ports 1 1 and 1 2 as ring ports N ou N rs il JI Figure 6 Example of MRP Ring RM Ring Manager main line redundant line The following example configuration describes the configuration of the ring manager device 1 You configure the 2 other devices 2 to 3 in the same way but without activating the ring manager function This example does not
34. RP ring into a VLAN Inthe VLAN ID field define the MRP VLAN ID The MRP VLAN ID determines in which of the configured VLANs the device transmits the MRP packets To set the MRP VLAN ID first configure the VLANs and the corresponding egress rules in the Switching gt VLAN gt Configuration dialog see Prerequisites for MRP on page 21 on Off Ring Port 1 Ring Port 2 Port 1 1 v Port 1 2 Operation blocked Operation forwarding Configuration Ring Manager On C off Advanced Mode v Ring Recover y C 500ms 200ms LAN ID fo Information maass Set Reload Help Figure 15 Changing the VLAN ID If the MRP Ring is not assigned to a VLAN like in this example leave the VLAN ID as 0 Inthe Switching gt VLAN gt Configuration dialog define the VLAN membership as U untagged for the ring ports in VLAN 1 If the MRP Ring is assigned to a VLAN enter a VLAN ID gt 0 In the Switching gt VLAN gt Configurationdialog define the VLAN membership as T tagged for the ring ports in the selected VLAN mrp domain modify vlan Assigns the VLAN ID lt 0 4042 gt UM RedundConfig HiOS 2S 2A 3S RSPE 32 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 Mulitple Rings HiOS 2A HiOS 3S The device allows you to set up multiple rings with different redundancy protocols You have the option of nesting MRP rings A coupled ring is a subring You have the option of cou
35. ann devices support link down notifications Therefore you gener ally activate the advanced mode in the ring manager If you are using devices that do not support link down notifications the ring manager reconfigures the line in the selected maximum reconfiguration time UM RedundConfig HiOS 2S 2A 3S RSPE 20 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 4 Prerequisites for MRP 2 4 Prerequisites for MRP Before setting up an MRP Ring make sure that the following conditions are fulfilled All ring participants support MRP The ring participants are connected to each other via the ring ports Apart from the device s neighbors no other ring participants are connected to the respective device All ring participants support the configuration time defined in the ring manager There is exactly 1 ring manager in the ring If you are using VLANs configure every ring port with the following settings Deactivate ingress filtering see the Switching VLAN Port Switching gt VLAN gt Port dialog Define the port VLAN ID PVID see the Switching gt VLAN gt Port dialog PVID 1 if the device transmits the MRP data packets untagged VLAN ID 0 in Switching gt L2 Redundancy gt MRP dialog By setting the PVID 1 the device automatically assigns the received untagged packets to VLAN 1 PVID any if the device transmits the MRP data packets in a VLAN VLAN ID 2 1 in the Switching gt L2 Redundancy gt M
36. ble Switch to the privileged EXEC mode configure Switch to the Configuration mode spanning tree bpdu guard Activates the BPDU Guard show spanning tree global Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE 100 Release 4 0 07 2014 Spanning Tree 6 6 Guards Open the Switching gt L2 Redundancy gt Spanning Tree gt Port dialog LI Switch to the CIST tab For terminal device ports mark the checkbox in the Admin Edge Port column CIST Guaras Stp Port Port Port Port Received Received Received Admin Auto Oper Oper active State Role Pathcost Priority Bridge ID Port ID Path Cost Port ay Port Edge Port PointToPoint dis cE ile J J q J J STROTRS RO ee ie ee ee Aimnimininininialn a F cao KUKUK UKUKUKUKUKUK KUKA WIddd9 9000004 YS Sa J J Set Reload Help Figure 45 Switching gt L2 Redundancy gt Spanning Tree gt Port dialog CIST tab Click Set to save the changes interface x y Switches to the interface mode spanning tree edge port Designates the port as a terminal device port edge port show spanning tree port x y Displays the parameters for checking exit Leaves the interface mode UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 101
37. capable devices support up to 8 instances and thus manage up to 8 subrings at the same time The Subring function allows you to integrate devices that support MRP as participants The devices with which you couple the subring to the main ring require the Subring Manager function Each subring can consist of up to 200 participants excluding the Subring Managers themselves and the devices between the Subring Managers in the main ring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 35 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S The following figures show examples of possible subring topologies Figure 17 Example of an overlapping subring structure UM RedundConfig HiOS 2S 2A 3S RSPE 36 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S RM Hi Figure 18 Special case a Subring Manager manages 2 subrings 2 instances The Subring Manager is capable of managing up to 8 instances Figure 19 Special case a Subring Manager manages both ends of a subring on different ports Single Subring Manger UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 37 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S Note In the previous examples the Subring Managers couple subrings solely to existing main rings The Subring function prohibits cascaded subrings for example coupling a new subring to another existing subring When you use MRP
38. ce Switch to the Configuration mode Enable evaluation of received supervision packets Enable supervision packet transmission Enable sending of supervision packets for this RedBox exclusively Use the no form of the command to send supervision packets for each connected VDAN and this RedBox if send is enabled Enable the PRP function Show prp counters Show node table Show proxy node table UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 6 PRP and Port Mirroring 4 6 PRP and Port Mirroring The transceivers send traffic to the LRE which separates the traffic The LRE forwards the data frames to PRP Port A and the control frames to PRP Port B of the switch When you configure the PRP Port A as a source port the device sends the control frames to the destination port When you configure the PRP Port B as a source port the device sends the data frames to the destination port Configure Port A and Port B in the Switching gt L2 Redundancy gt PRP gt Configuration dialog The device also restricts the PRP interface and the PRP member ports from being destination ports UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 55 Parallel Redundancy Protocol PRP 56 4 6 PRP and Port Mirroring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 High availability Seamless Redun dancy HSR 5 High availability Seamless Redundancy HSR As with PRP an
39. ckly relearn the MAC addresses UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 123 Link Backup 9 2 Example Configuration 9 2 Example Configuration In the example network below you connect ports 2 3 and 2 4 on switch A to the uplink switches B and C When you set up the ports as a Link Backup pair 1 of the ports forwards traffic and the other port is in the blocking mode The primary port 2 3 on switch A is the active port and is forwarding traffic to port 1 on switch B Port 2 4 on switch A is the backup port and is blocking traffic When switch A disables port 2 3 because of a detected error then port 2 4 on switch A starts forwarding traffic to port 2 on switch C When port 2 3 returns to the active state no shutdown with Fail Back Active activated and Fail Back Delay s set to 30 s After the timer expires port 2 4 first blocks the traffic and then port 2 3 starts forwarding the traffic Switch A Figure 55 Link Backup example network The following tables contain examples of parameters for Switch A set up 1 Open the Switching gt L2 Redundancy gt Link Backup dialog LI To enter a new Link Backup pair in the table click Create UM RedundConfig HiOS 2S 2A 3S RSPE 124 Release 4 0 07 2014 Link Backup 9 2 Example Configuration In the Create window from the Primary Port drop down menu select 2 3 and from the Backup Port drop down menu select 2 4 O Click OK I In the De
40. ctor It is part of the RS TP BPDUs and contains the following infor mation Bridge identification of the root bridge Root path costs of the sending bridge Bridge identification of the sending bridge Port identifiers of the ports through which the message was sent Port identifiers of the ports through which the message was received Based on this information the bridges participating in RSTP are able to determine port roles themselves and define the port states of their own ports 6 4 4 Fast reconfiguration Why can RSTP react faster than STP to an interruption of the root path Introduction of edge ports During a reconfiguration RSTP switches an edge port into the transmis sion mode after three seconds default setting and then waits for the Hello Time to elapse to be sure that no bridge sending BPDUs is connected When the user ensures that a terminal device is connected at this port and will remain connected there are no waiting times at this port in the case of a reconfiguration Introduction of alternate ports As the port roles are already distributed in normal operation a bridge can immediately switch from the root port to the alternate port after the connection to the root bridge is lost Communication with neighboring bridges point to point connections Decentralized direct communication between neighboring bridges enables reaction without wait periods to status changes in the spanning tree topology UM R
41. e In general a device in the backbone takes on this role Set up the network to meet your requirements initially without redundant lines You deactivate the flow control on the participating ports If the flow control and the redundancy function are active at the same time there is a risk that the redundancy function will not operate as intended Default setting flow control deactivated globally and activated on all ports LI Switch MRP off on all devices L Switch Spanning Tree on on all devices in the network In the state on delivery Spanning Tree is switched on on the device UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 O1 Spanning Tree 6 5 Configuring the device L Open the Switching gt L2 Redundancy gt Spanning Tree gt Global dialog Activate the function Operation Protocol Version Co Cot R Protocol Sauer Information Bridge Root Topology Bridge ID 32768 006064catfee 32768 008064caffee Bridge is Root Vv Priority 32768 v zs o RodtPor bo HeloTimets Po 2 O Root Path Cost o Forward Delay s hs fs Topology Change Count o Max Age po ooo booo Time Since Topology Change loday s 41458 TxHoldCount fio BPDU Guard E Set Reload Help Figure 39 Switching the function on Click Set to save the changes enable Switch to the privileged EXEC mode configure Switch to the Configuration mode Sspanning tree operation Switches Spanning Tree on
42. e and discards the second frame when it arrives An HSR RedBox on the other hand forwards the first frame to the VDANHs and discards the second frame when it arrives The HSR Nodes and HSR RedBoxs insert an HSR tag after the source MAC Address in the frame The advantage to the HSR tag placement is that the device is able to forward the frame immediately after receiving the HSR header and performing duplicate recognition Affectively decreasing the delay time within the device In contrast to PRP where the RCT contains a PRP suffix near the end of the frame Meaning that a PRP device receives the entire frame before forwarding the frame out of the correct port HSR Nodes and HSR RedBoxes also use the LRE function as described in the PRP chapter As with PRP the LRE in the HSR RedBoxes are respon sible for tagging and duplicate recognition Limit the maximum number of nodes in an HSR ring to 10 so that a DAN or Redbox receives these packets within a specific time frame Note HSR is available for devices with hardware for enhanced redundancy functions In order to use the HSR functions load the HSR device software UM RedundConfig HiOS 2S 2A 3S RSPE 58 Release 4 0 07 2014 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR 5 2 HSR Network Structure An HSR Network consists of a ring where each HSR device performs a specific role in the network An HSR device for example connects standard ethernet devices to an HS
43. e to process traffic destine for LAN B of the PRP network Enable evaluation of received supervision packets Enable supervision packet transmission Enable sending of supervision packets for this RedBox exclusively Use the no form of the command to send supervision packets for each connected VDAN and this RedBox Prerequisite is that you enable the supervision frame send function Enable the HSR function View traffic statistics on a device using the show commands Show the HSR counters UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR show hsr node table Show node table show hsr proxy node table Show proxy node table 5 2 2 HSR and PRP network connections When connecting PRP networks to an HSR network the HSR device uses 2 interfaces to connect to the HSR ring The HSR device uses a third interface to connect to either LAN A or LAN B of the PRP network as seen in the following figure The HSR device transmitting the traffic across the HSR ring identifies traffic destine for PRP networks with the appropriate tag The HSR devices then forward the PRP traffic through LAN A or LAN B The PRP device receives the traffic and processes It as described in the PRP chapter The HSR devices tag and identify traffic for up to 7 PRP networks connected to 1 HSR ring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 63 High availability Seamles
44. ecomes inoperable the STP required a maximum of 30 seconds to reconfigure This is no longer accept able in time sensitive applications RSTP achieves average reconfiguration times of less than a second When you use RSTP in a ring topology with 10 to 20 devices you can even achieve reconfiguration times in the order of milliseconds Note RSTP reduces a layer 2 network topology with redundant paths into a tree structure Spanning Tree that does not contain any more redundant paths One of the Switches takes over the role of the root bridge here The maximum number of devices permitted in an active branch from the root bridge to the tip of the branch is specified by the variable Max Age for the current root bridge The preset value for Max Age is 20 which can be increased up to 40 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 69 Spanning Tree If the device working as the root is inoperable and another device takes over its function the Max Age setting of the new root bridge determines the maximum number of devices allowed in a branch Note The RSTP standard dictates that all the devices within a network work with the Rapid Spanning Tree Algorithm If STP and RSTP are used at the same time the advantages of faster reconfiguration with RSTP are lost in the network segments that are operated in combination A device that only supports RSTP works together with MSTP devices by not assigning an MST region to itself but rathe
45. edundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 89 Spanning Tree 6 4 The Rapid Spanning Tree Protocol Address table With STP the age of the entries in the FDB determines the updating of communication RSTP immediately deletes the entries in those ports affected by a reconfiguration Reaction to events Without having to adhere to any time specifications RSTP immediately reacts to events such as connection interruptions connection reinstate ments etc Note The downside of this fast reconfiguration is the possibility that data packages could be duplicated and or arrive at the recipient in the wrong order during the reconfiguration phase of the RSTP topology If this is unaccept able for your application use the slower Spanning Tree Protocol or select one of the other faster redundancy procedures described in this manual 6 4 5 STP compatibility mode The STP compatibility mode allows you to operate RSTP devices in networks with old installations If an RSTP device detects an older STP device it switches on the STP compatibility mode at the relevant port UM RedundConfig HiOS 2S 2A 3S RSPE 90 Release 4 0 07 2014 Spanning Tree 6 5 Configuring the device 6 5 Configuring the device RSTP configures the network topology completely independently The device with the lowest bridge priority automatically becomes the root bridge However to define a specific network structure regardless you specify a device as the root bridg
46. etwork Enable the device to process traffic destine for LAN A of the PRP network 1 Enable evaluation of received supervision packets Enable supervision packet transmission Enable sending of supervision packets for this RedBox exclusively Use the no form of the command to send supervision packets for each connected VDAN and this RedBox Prerequisite is that you enable the supervision frame send function Enable the HSR function Use the following CLI commands to configure DANH 2 to process traffic for PRP network 1 LAN B hsr instance 1 mode modeu hsr instance 1 port a hsr instance 1 port b hsr instance 1 switching node type h hsrredboxprpb UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 The HSR host forwards unicast traffic to the connected VDANs and around the ring Activate the HSR Port A Activate the HSR Port B Enable the device to process traffic destine for LAN B of the PRP network 67 High availability Seamless Redun dancy HSR 68 5 2 HSR Network Structure hsr instance 1 redbox id idlb Enable the device to process traffic destine for hsr instance 1 supervision evaluate hsr instance 1 supervision send hsr instance 1 supervision redbox exclusively hsr operation LAN B of the PRP network 1 Enable evaluation of received supervision packets Enable supervision packet transmission Enable sending of supervision packets for this RedBox exclusively Use the n
47. for the main ring and the subring then specify the VLAN settings as follows VLAN x for main ring onthe ring ports of the main ring participants onthe main ring ports of the subring manager VLAN y for subring onthe ring ports of the subring participants onthe subring ports of the subring manager You can use the same VLAN for multiple subrings UM RedundConfig HiOS 2S 2A 3S RSPE 38 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S 3 1 2 Subring example In the following example you couple a new network segment with 3 devices to an existing main ring which uses the MRP protocol If you couple the network at both ends instead of just 1 end then the subring provides increased availability with the corresponding configuration You couple the new network segment as a subring You couple the subring to the existing devices of the main ring using the following configuration types Figure 20 Example of a subring structure orange line Main ring members in VLAN 1 black line Subring members in VLAN 2 orange dash line Main ring loop open black dash line Subring loop open red line Redundant link member in VLAN 1 SRM Subring Manager RM Ring Manager UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 39 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S Proceed as follows to configure a subring Configure the three devices of the new network segment
48. ger mode from the SRM Mode dropdown list You thus specify which port coupling the subring to the main ring becomes the redundant manager The options for the coupling are manager When you specify both Subring Managers as the same value the device with the higher MAC address manages the redundant link redundant manager This device manages the redundant link as long as you have specified the other Subring Manager as a manager Otherwise the device with the higher MAC address manages the redundant link specify Subring Manager 1 as manager in accordance with the figure depicting this example Leave the VLAN field and the MRP Domain field as set by default These values are correct for the example configuration To temporarily save the changes and return to the Sub Ring dialog click Set and back To update the table in the Sub Ring dialog and verify the entries click Reload Max Table Entries 8 Sub Ring Function ID on off Redundancy SRM State existing Port Name SRM Mode SRM State Port Status WLAN Partner MAC MRP Domain 1 GP amp 13 Test manager manager _not connected 2 00 00 00 00 00 00 255 255 255 255 255 255 255 255 255 255 255 255 255 259 4 HT p Set J Reload Remove Create Figure 22 Completely configured Subring Manager enable Switch to the privileged EXEC mode configure Switch to the Configuration mode sub ring new ring 1 Creates a new subring
49. he Redundancy Configuration user manual document contains the infor mation you require to select the suitable redundancy procedure and configure it The Routing Configuration User Manual document contains the information you need to start operating the routing function It takes you step by step from a small router application through to the router configuration of a complex network The manual enables you to configure your router by following the examples The document HiView User Manual contains information about the GUI application HiView This application offers you the possibility to use the graphical user interface without other applications such as a Web browser or an installed Java Runtime Environment JRE UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Q About this Manual The Industrial HiVision network management software provides you with additional options for smooth configuration and monitoring ActiveX control for SCADA integration Auto topology discovery Browser interface Client server structure Event handling Event log Simultaneous configuration of multiple devices Graphical user interface with network layout SNMP OPC gateway UM RedundConfig HiOS 2S 2A 3S RSPE 10 Release 4 0 07 2014 Key Key The designations used in this manual have the following meanings List L Work step Subheading Link Cross reference with link Note A note emphasizes an important fact or draws your attention
50. he Rapid Spanning Tree Protocol 6 4 2 Port states Depending on the tree structure and the state of the selected connection paths the RSTP assigns the ports their states STP port state Administrative MAC RSTP Active topology bridge port operational Port state port role state DISABLED Disabled FALSE Discarding Excluded disabled DISABLED Enabled FALSE Discarding Excluded disabled BLOCKING Enabled TRUE Discarding Excluded alternate backup LISTENING Enabled TRUE Discarding Included root designated LEARNING Enabled TRUE Learning Included root designated FORWARDING Enabled TRUE Forwarding Included root designated Table 5 Relationship between port state values for STP and RSTP a The dotid MIB displays Disabled b The dotid MIB displays Blocked Meaning of the RSTP port states Disabled Port does not belong to the active topology Discarding No address learning in FDB no data traffic except for STP BPDUs Learning Address learning active FDB and no data traffic except for STP BPDUs Forwarding Address learning is active FDB sending and receipt of all frame types not only STP BPDUs UM RedundConfig HiOS 2S 2A 3S RSPE 88 Release 4 0 07 2014 Spanning Tree 6 4 The Rapid Spanning Tree Protocol 6 4 3 Spanning Tree Priority Vector To assign roles to the ports the RSTP bridges exchange configuration infor mation with each other This information is known as the Spanning Tree Priority Ve
51. iView 9 HSR 15 16 57 HSR and PRP network connections 63 HSR Netzwerk Structure 59 l Industrial HiVision 10 L Link Aggration 16 Loop guard 99 104 LRE functionality 47 M MaxAge 76 MRP 15 16 17 21 MRP over LAG 113 Network load 69 71 Network structure PRP 49 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 P Path costs Tol Port Identifier 72 74 Port mirroring and PRP 55 Port number 14 Port priority Spanning Tree 14 Port roles RSTP 85 Port State 88 PRP 16 45 PRP example configuration 52 PRP network structure 49 PRP RedBox Example HSR 65 Protection functions guards 97 R Rapid Spanning Tree 14 15 16 85 Reconfiguration 71 Reconfiguration time MRP 19 RedBox 51 Redundancy 9 69 Ring 18 114 Ring Manager 114 Ring manager 18 RM function 18 114 Root Bridge T1 Root guard 97 104 Root Path Cost 72 Root path 80 82 Root port 85 99 Router 9 RSTP 91 RST BPDU 86 89 S SAN RedBox HSR Example 60 SAN for HSR 59 STP compatibility 90 STP BPDU 77 Subring 16 34 Symbol 11 T TCN guard 98 104 Technical Questions 131 Topology Change flag 98 Training Courses 131 Tree structure Spanning Tree T1 84 129 Index UM RedundConfig HiOS 2S 2A 3S RSPE 130 Release 4 0 07 2014 Further Support C Further Support Technical Questions For technical questions please contact any Hirschmann dealer in your area or Hirschmann directly You will find the addresses of our partners on the Inter
52. le free operation Your comments and suggestions help us to further improve the quality of our documentation Your assessment of this manual Very good Good Satisfactory Mediocre Poor Precise description O O O O O Readability O O O O O Understandability O O O O O Examples O O O O O Structure O O O O O Completeness O O O O O Graphics O O O O O Drawings O O O O O Tables O O O O O Did you discover any errors in this manual If so on what page UM RedundConfig HiOS 2S 2A 3S RSPE 126 Release 4 0 07 2014 Readers Comments Suggestions for improvement and additional information General comments Sender Company Department Name Telephone no Street Zip code City e mail Date Signature Dear User Please fill out and return this page as a fax to the number 49 0 7127 14 1600 or by post to Hirschmann Automation and Control GmbH Department 01RD NT Stuttgarter Str 45 51 72654 Neckartenzlingen UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 127 Readers Comments UM RedundConfig HiOS 2S 2A 3S RSPE 128 Release 4 0 07 2014 Index B index A Advanced Mode 20 22 Alternate port 86 99 B Backup port 86 99 BPDU 77 BPDU guard 97 100 Bridge Identifier 72 Bridge Protocol Data Unit 7 C Compatibility STP 90 D DAN 51 Delay time MRP 19 Designated bridge 85 Designated port 85 97 Diameter Spanning Tree 15 Disabled port 86 E Edge port 86 97 F FAQ 131 H H
53. n Ring Manager fon C Off Advanced Mode Iw Ring Recovery C 500ms 200ms VLAN ID OO information Set Reload Delete ring configuration Help Figure 12 Switching on the MRP function Click on Set to save the changes mrp domain modify operation Activates the MRP Ring enable When all the ring participants are configured close the line to the ring To do this you connect the devices at the ends of the line via their ring ports Check the messages from the device show mrp Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 29 Media Redundancy Protocol MRP 2 5 Example Configuration The Operation field shows the operating state of the ring port Possible values gt forwarding Port is switched on connection exists gt blocked Port is blocked connection exists gt disabled Port is disabled gt not connected No connection exists Operation On C Off o Port 1 gt Ring Port 2 E Port E Port 1 2 Configuration Ring Manager f On Coffi Advanced Mode Iv Ring Recovery 500ms 200ms VLAN ID OO EE Configuration error error on ringport link Set Reload Delete ring configuration Help Figure 13 Messages in the Operation field UM RedundConfig HiOS 2S 2A 3S RSPE 30 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 5 Example Configuration The Informati
54. n function is activated the device ignores Topology Change flags in received STP BPDUs This does not change the content of the address table FDB of the device port However additional infor mation in the BPDU that changes the topology is processed by the device Loop Guard for root alternate and backup ports You activate this protection function separately for every device port Root This protection function prevents the transmission status of a port from unintentionally being changed to forwarding if the port does not receive any more STP BPDUs If this situation occurs the device designates the loop status of the port as inconsistent but does not forward any data packets UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 99 Spanning Tree 6 6 Guards 6 6 1 Activating the BPDU Guard L Open the Switching gt L2 Redundancy gt Spanning Tree gt Global u Mark the BPDU Guard checkbox Operation Protocol Version on off IRSTP Protocol Configuration Information Bridge Root Topology Bridge ID 4096 00 80 64 ca ff ee 4096 00 80 64 ca ff ee Bridge is Root IV Priority 4096 4096 Root Port o o Hello Time s 2 2 Root Path Cost fo Forward Delay s fi 5 fi Topology Change Count fo Max Age 20 fzo Time Since Topology Change fo day s 3 48 03 Tx Hold Count fi 0 BPDU Guard Iv Set Reload Help Figure 44 Activating the BPDU Guard Click Set to save the changes ena
55. nes port lag 1 as ring port 2 secondary The device stores the current configuration data in the local non volatile memory 119 MRP over LAG HiOS 2A HiOS 3S 8 2 Example Configuration UM RedundConfig HiOS 2S 2A 3S RSPE 120 Release 4 0 07 2014 Link Backup 9 Link Backup Link Backup provides a redundant link for traffic on Layer 2 devices When the device detects an error on the primary link then the device transfers traffic to the backup link You typically use Link Backup in service provider or enterprise networks You set up the backup links in pairs one as a primary and one as a backup When providing redundancy for enterprise networks for example the device allows you to set up more than 1 pair The maximum number of link backup pairs is total number of physical ports 2 Furthermore the device sends an SNMP trap when the state of a port participating in a link backup pair changes When configuring link backup pairs remember the following rules A link pair consists of any combination of physical ports For example when 1 port is a 100 Mbit port and the other is a 1000 Mbit SFP port A specific port is a member of 1 link backup pair at any given time Verify that the ports of a link backup pair are members of the same VLAN with the same VLAN ID When the primary port or backup port is a member of a VLAN then assign the second port of the pair to the same VLAN The default setting for this function is inactive withou
56. net at http www hirschmann com Contact our support at https hirschmann support belden eu com You can contact us in the EMEA region at Tel 49 0 1805 14 1538 E mail hac support belden com in the America region at Tel 1 717 217 2270 E mail inet support us belden com in the Asia Pacific region at Tel 65 6854 9860 E mail inet ap belden com Hirschmann Competence Center The Hirschmann Competence Center is ahead of its competitors Consulting incorporates comprehensive technical advice from system evaluation through network planning to project planning Training offers you an introduction to the basics product briefing and user training with certification The current technology and product training courses can be found at http www hicomcenter com Support ranges from the first installation through the standby service to maintenance concepts UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 131 Further Support With the Hirschmann Competence Center you have decided against making any compromises Our client customized package leaves you free to choose the service components you want to use Internet http www hicomcenter com UM RedundConfig HiOS 2S 2A 3S RSPE 132 Release 4 0 07 2014 Further Support UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 133 h HIRSCHMANN A BELDEN BRAND
57. nfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 115 MRP over LAG HiOS 2A HiOS 3S 8 1 Network Structure 8 1 3 Detecting interruptions on the ring When configuring the LAG instance specify the Min Active Ports value to equal the total number of ports used in the LAG instance If a device detects an interruption on a port in the LAG instance then it blocks data on the other ports of the instance With every port of an instance blocked the RM senses that the ring is open and begins forwarding data on the secondary port This way the RM is able to restore continuity to the devices on the other side of the interrupted segment Figure 52 Interruption of a link in an MRP ring UM RedundConfig HiOS 2S 2A 3S RSPE 116 Release 4 0 07 2014 MRP over LAG HiOS 2A HiOS 3S 8 2 Example Configuration 8 2 Example Configuration In the following example switch A and switch B link to departments together The departments produce traffic too large for the individual port bandwidth to handle You configure a LAG instance for the single segment of the MRP ring increasing the bandwidth of the segment The prerequisite for the example configuration is that you begin with an oper ational MRP ring For details on how to configure an MRP ring see Media Redundancy Protocol MRP on page 17 RM Ring Port 2 Ring Port 1 1 1 fr 21 Bg Be oc 9 teg pg Switch A Switch B Figure 53 MRP over LAG Configuration Example Using the following workste
58. ng the tree structure as STP RSTP merely changes parameters and adds new parameters and mechanisms that speed up the reconfiguration if a link or bridge becomes inoperable The ports play a significant role in this context 6 4 1 Port roles RSTP assigns each bridge port one of the following roles see figure 38 Root Port This is the port at which a bridge receives data packets with the lowest path costs from the root bridge If there are multiple ports with equally low path costs the bridge ID of the bridge that leads to the root designated bridge decides which of its ports is given the role of the root port by the bridge further away from the root If a bridge has multiple ports with equally low path costs to the same bridge the bridge uses the port ID of the bridge leading to the root desig nated bridge to decide which port it selects locally as the root port see figure 34 The root bridge itself does not have a root port Designated port The bridge in a network segment that has the lowest root path costs is the designated bridge lf more than 1 bridge has the same root path costs the bridge with the smallest value bridge identifier becomes the designated bridge The designated port on this bridge is the port that connects a network segment leading away from the root bridge If a bridge is connected to a network segment with more than one port via a hub for example the bridge gives the role of the designated port to
59. nks is sourceDestMacVlan Min Active Ports is 1 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 107 Link Aggregation Configuration Hashing Option sourceDesthacVian bod Trunk Port Device Ports Name Active Link Trap STP Mode ag 1 1 2 1 3 1 4 LAG instance1 V W W Static Link Aggregation Z Hashing Option Min Active Ports Type sourceDestMacVian 1 dynamic se Gens Corca Creme Casa nence rons Remove Dv one Figure 48 Switching gt L2 Redundancy gt Link Aggregation 108 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Link Aggregation 7 1 Methods of Operation 7 1 Methods of Operation The device operates on the Single Switch method The Single Switch method provides you an inexpensive way to grow your network The single switch method states that you need 1 device on each side of a link to provide the physical ports The device balances the traffic load across the group member ports The device also uses the Same Link Speed method in which the group member ports are full duplex point to point links having the same transmis sion rate The first port the user adds to the group is the master port and determines the bandwidth for the other member ports of the Link Aggregation Group The device allows you to configure up to 4 Link Aggregation Groups with up to 4 ports in each group Hash Algorithm The frame distributor is responsible for receiving frame
60. nsition from double to single LAN UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 51 Parallel Redundancy Protocol PRP 4 5 Example Configuration 4 5 Example Configuration The following example uses a simple PRP network with 4 devices Verify that the LAN A and LAN B ports contain 100 Mbit s optical SFP interfaces Connect Port A to LAN A and the Port B to LAN B VDAN1 VDAN 2 GK PRP Network DC DANP 1 Figure 26 Example PRP Network Note PRP is available for devices with hardware for enhanced redundancy functions In order to use the PRP functions load the PRP device software The PRP function reserves ports 1 1 and 1 2 This removes the possibility of using other redundancy protocols such as Spanning Tree or MRP in parallel on ports 1 1 and 1 2 Ifyou use Spanning Tree in parallel to PRP deactivate Spanning Tree on ports 1 1 and 1 2 Also deactivate the functions Root Guard TCN Guard and Loop Guard on ports 1 1 and 1 2 Ifyou use MRP in parallel to PRP specify the other free device ports as MRP Ring ports UM RedundConfig HiOS 2S 2A 3S RSPE 5 Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 5 Example Configuration Perform the following steps on both the RedBox 1 and DANP 1 devices 1 Open the Switching gt L2 Redundancy gt PRP gt Configuration dialog Perform the following step in the Supervision Packet Receiver frame To analyze received PRP supervision packets ac
61. ntly without evaluating the RCT infor mation Note The RCT trailer increases packet size Configure the MTU size equal to or greater than 1524 for LAN A and LAN B devices UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 49 Parallel Redundancy Protocol PRP 4 3 PRP Network Structure Terminal devices that connect directly to a device in the transit LAN are SANs Single Attached Nodes SANs connected to a LAN have no redun dancy To use the PRP redundant network connect the SAN to the PRP network via a RedBox SAN B1 SAN B2 PRP Network Figure 24 Parallel Redundancy Protocol Network UM RedundConfig HiOS 2S 2A 3S RSPE 5O Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 4 Connecting RedBoxes and DANPs to a PRP network 4 4 Connecting RedBoxes and DANPs to a PRP network DANPs have 2 interfaces for the connection to the PRP network A RedBox is a DANP that contains additional switch ports Use the switch ports to inta grate one or more SANs into the PRP network redundantly The Link Redundancy Entity LRE in the RedBox creates a twin packet when sending a data packet to the PRP network The LRE forwards 1 data packet of the twin pair when it receives it and discards the 2nd data packet of the twin pair Note The Redbox supports up to 128 hosts When attempt to support more than 128 with the Redbox then device drops packets VD RedBox Transceiver LAN A LAN B Figure 25 RedBox Tra
62. o disable the MRP function in the Operation frame Opera tion Off Verify that the ports in Ring Port 1 and Ring Port 2 frames are different from the ports used by HSR Open the Switching gt L2 Redundancy gt Spanning Tree gt Global dialog To disable the MRP function in the Operation frame Opera tion Off Open the Switching gt L2 Redundancy gt Spanning Tree gt Port dialog In the CIST tab deactivate the ports used for HSR in the Stp active column In the Guards tab deactivate the ports used for HSR in the Root Guard TCN Guard and Loop Guard columns Note If you deactivate the HSR function then deactivate either Port A or B to help prevent network loops 60 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR The device sends either its own HSR supervision packets exclusively or sends both its own supervision packets and packets of connected devices After installing new HSR devices deactivate this function to maintain a clear overview of the HSR supervision packets on remote devices 1 Open the Switching gt L2 Redundancy gt HSR gt HSR gt HSR gt Configuration dialog To analyze received HSR supervision packets activate the Eval uate Supervision Packets checkbox in the Supervision Packet Receiver frame To transmit HSR supervision packets from this device activate Active in
63. o form of the command to send supervision packets for each connected VDAN and this RedBox Prerequisite is that you enable the supervision frame send function Enable the HSR function View traffic statistics on a device using the show commands show hsr counters show hsr node table show hsr proxy node table Show the HSR counters Show node table Show proxy node table UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Spanning Tree 6 Spanning Tree Note The Spanning Tree Protocol is a protocol for MAC bridges For this reason the following description uses the term bridge for Switch Local networks are getting bigger and bigger This applies to both the geographical expansion and the number of network participants Therefore it is advantageous to use multiple bridges for example to reduce the network load in sub areas to set up redundant connections and to overcome distance limitations However using multiple bridges with multiple redundant connections between the subnetworks can lead to loops and thus loss of communication across of the network In order to help avoid this you can use Spanning Tree Spanning Tree enables loop free switching through the systematic deactiva tion of redundant connections Redundancy enables the systematic reactiva tion of individual connections as needed RSTP is a further development of the Spanning Tree Protocol STP and is compatible with it Ifa connection or a bridge b
64. on field shows messages for the redundancy configura tion and the possible causes of errors The following messages are possible if the device is operating as a ring client or a ring manager Redundancy Available The redundancy is set up When a component of the ring is down the redundant line takes over its function Configuration error Ring port link error Error in the cabling of the ring ports The following messages are possible if the device is operating as a ring manager Configuration error Packet of other ring manager received Another device exists in the ring that is operating as the ring manager Activate the Ring Manager function on exactly one device in the ring Configuration error Connection in ring iS connected to incorrect port A line in the ring is connected with a different port instead of with a ring port The device only receives test data packets on 1 ring port Operation on oft Ring Port 1 Ring Port 2 Port fia Port 12 Operation notConnected Operation notConnected Configuration Ring Manager on Off Advanced Mode Iv Ring Recovery C 500ms 200ms LAN ID lo Information Configuration error error on ringport link Set Reload Delete ring configuration Help Figure 14 Messages in the Information field UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 31 Media Redundancy Protocol MRP 2 5 Example Configuration If applicable integrate the M
65. on MaxAge 76 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Spanning Tree 6 2 Rules for Creating the Tree structure 6 2 Rules for Creating the Tree Structure 6 2 1 Bridge information To determine the tree structure the bridges need more detailed information about the other bridges located in the network To obtain this information each bridge sends a BPDU Bridge Protocol Data Unit to the other bridges The contents of a BPDU include bridge identifier root path costs and port identifier see IEEE 802 1D 6 2 2 Setting up the tree structure The bridge with the smallest number for the bridge identifier is called the root bridge It is or will become the root of the tree structure The structure of the tree depends on the root path costs Spanning Tree selects the structure so that the path costs between each individual bridge and the root bridge become as small as possible UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Tf Spanning Tree 6 2 Rules for Creating the Tree Structure If there are multiple paths with the same root path costs the bridge further away from the root decides which port it blocks For this purpose it uses the bridge identifiers of the bridge closer to the root The bridge blocks the port that leads to the bridge with the numerically higher ID a numerically higher ID is the logically worse one If 2 bridges have the same priority the bridge with the numerically larger
66. ore have different run times The receiving PRP interface forwards the first packet of a pair towards the upper protocol layers and discards the second packet When viewed from the application a PRP interface functions like a standard Ethernet interface The PRP interface or a Redundancy Box RedBox injects a Redundancy Control Trailer RCT into each packet The RCT is a 48 bit identification field and is responsible for the identification of duplicates This field contains LAN identification LAN A or B information about the length of the payload and a 16 bit sequence number The PRP interface increments the sequence number for each packet sent Using the unique attributes included in each packet such as Physical MAC source address and sequence number the receiving RedBox or Double Attached Node DAN interface identifies and discards duplicates Depending on the packet size with PRP it attains a reduced throughput of the available bandwidth due to the addition of the RCT trailer UM RedundConfig HiOS 2S 2A 3S RSPE 46 Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 2 LRE Functionality 4 2 LRE Functionality Each Double Attached Node implementing PRP DANP has 2 LAN ports that operate in parallel The Link Redundancy Entity LRE connects the upper protocol layers with every individual port DANP 1 DANP 2 hard real time hard real time an ayere same data link layer interface Network adapters LAN A LAN B
67. orities of the bridges in the bridge identifier apart from the value for the root bridge the MAC address in the bridge identifier alone determines which bridge becomes the new root bridge if the current root bridge goes down UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 81 Spanning Tree 6 3 Examples 6 3 2 Example of manipulating the root path You can use the network plan see figure 36 to follow the flow chart see figure 34 for determining the root path The Administrator has performed the following Left the default value of 32 768 8000H for every bridge apart from bridge 1 and bridge 5 and assigned to bridge 1 the value 16 384 4000H thus making it the root bridge To bridge 5 he assigned the value 28 672 7000H The protocol blocks the path between bridge 2 and bridge 3 as a connection from bridge 3 via bridge 2 to the root bridge would mean higher path costs The path from bridge 6 to the root bridge is interesting The bridges select the path via bridge 5 because the value 28 672 for the priority in the bridge identifier is smaller than value 32 768 UM RedundConfig HiOS 2S 2A 3S RSPE 8 Release 4 0 07 2014 Spanning Tree 6 3 Examples Root Bridge P BID 16384 xh P BID 32768 P BID 32768 P BID 32 768 xl L P BID 32768 P BID 28672 Se ee 5 P BID Priority of the bridge identifikation BID BID without MAC Address Root path
68. otocols 1 2 Redundancy Protocols For operating in different network topologies the device provides you with the following redundancy protocols Redundancy Network topology Comments protocol HSR Ring Uninterrupted availability On the path from the sender to the receiver HSR transports the data packets in both directions via a ring MRP Ring The switching time can be selected and is practically independent of the number of devices An MRP Ring consits of up to 50 devices that support the MRP protocol according to IEC 62439 If you only use Hirschmann devices up to 100 devices are possible in the MRP Ring Subring Ring The subring function enables you to easily couple network segments to existing redundancy rings PRP Random structure of Uninterrupted availability On the path from the sender the PRP LANs to the receiver PRP transports a data packet in parallel via 2 mutually independent LANs RSTP Random structure The switching time depends on the network topology and the number of devices typ lt 1 swith RSTP typ lt 30 s with STP Link Aggrega Random structure A Link Aggregation Group is the combining of 2 or more tion full duplex point to point links operating at the same rate on a single switch to increase bandwidth Table 1 Overview of redundancy protocols Note When you are using a redundancy function you deactivate the flow control on the participating device ports If the flow control and the redun dancy f
69. pecified Oia Oak sale get oo ag ks MRP domain ID Any subsequent MRP domain 222 NDS O00 66 99 changes apply to this domain ID UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 41 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S 3 1 3 Subring example configuration Note Avoid loops during configuration Configure every device of the subring individually Before you activate the redundant link completely configure every subring device Proceed as follows to configure the 2 Subring Managers in the example Open the Switching gt L2 Redundancy gt Sub Ring dialog L To open the New Entry dialog click Create New Entry Sub Ring ID 2 Port All ba Name Test SRM Mode manager LA VLAN Z MRP Domain 255 255 255 255 255 255 255 25 set Setandback Back Hep Figure 21 New Entry dialog The device displays the value for the next available Sub Ring ID L Use the dropdown list in the Port field to select the port that couples the device to the subring Use port 1 3 for this example The dropdown list displays every device port For coupling use the ports available with the exception of the ports which are already connected to the main ring UM RedundConfig HiOS 2S 2A 3S RSPE 4 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S O Enter a name for the subring For this example enter Test Select the appropriate Subring Mana
70. pling other ring structures that work with RSTP to MRP rings UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 33 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S The Subring function is an extension of the Media Redundancy Protocol MRP This function allows you to couple a subring to a main ring using various network structures The Subring protocol provides redundancy for devices by coupling both ends of an otherwise flat network to a main ring setting up subrings has the following advantages Through the coupling process you include the new network segment in the redundancy concept Subrings allow easy integration of new areas into existing networks Subrings allow you easy mapping of the organizational structure of an area in a network topology In an MRP ring the failover times of the subring in redundancy cases are typically lt 100 ms UM RedundConfig HiOS 2S 2A 3S RSPE 34 Release 4 0 07 2014 Mulitple Rings HiOS 2A HiOS 3S 3 1 Subring HiOS 2A HiOS 3S 3 1 1 Subring description The subring concept allows you to couple new network segments to suitable devices in an existing ring main ring The devices with which you couple the subring to the main ring are Subring Managers SRM Figure 16 Example of a subring structure blue ring Main ring orange ring Subring red line Redundant link SRM Subring Manager RM Ring Manager The Subring Manager
71. ps configure switch A Configure switch B using the same worksteps substituting the appropriate port and ring port numbers Open the Switching gt L2 Redundancy gt Link Aggregation dialog To make a new entry in the table click Create In the Create dialog the device automatically enters the number of the next available instance in the Lag Index field The device also allows you to select another number for the instance from the pull down menu O Click OK O O L UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 117 MRP over LAG HiOS 2A HiOS 3S 8 2 Example Configuration To add available ports highlight the new entry and click Add Ports In the Select Ports to add dialog select ports 1 1 and 1 2 Click OK In the Min Active Ports column enter 2 which in this case is the total number of ports in the instance When combining MRP and LAG you specify the total number of ports as the Min Active Ports When the device detects an interruption on a port it blocks the other ports in the instance causing the ring to open The Ring Manager senses that the ring is open then begins forwarding data on its secondary ring port which restores the connectivity to the other devices in the network O O O Configuration Hashing Option sourceDestMacVlan Y Stp Static LACP LACP Collector LACP LACP Port A Trunk Port Name Active active Link Aggregation Hashing Option MTU Min Active Ports Type Link Trap
72. r the CST Common Spanning Tree UM RedundConfig HiOS 2S 2A 3S RSPE 70 Release 4 0 07 2014 Spanning Tree 6 1 Basics 6 1 Basics Because RSTP is a further development of the STP all the following descriptions of the STP also apply to the RSTP 6 1 1 The tasks of the STP The Spanning Tree Algorithm reduces network topologies built with bridges and containing ring structures due to redundant links to a tree structure In doing so STP opens ring structures according to preset rules by deactivating redundant paths If a path Is interrupted because a network component becomes inoperable STP reactivates the previously deactivated path again This allows redundant links to increase the availabiliy of communication STP determines a bridge that represents the STP tree structure s base This bridge is called root bridge Features of the STP algorithm automatic reconfiguration of the tree structure in the case of a bridge becoming inoperable or the interruption of a data path the tree structure is stabilized up to the maximum network size Stabilization of the topology within a short time period topology can be specified and reproduced by the administrator transparency for the terminal devices low network load relative to the available transmission capacity due to the tree structure created UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 71 Spanning Tree 6 1 Basics 6 1 2 Bridge parameters In the context of Spanning Tree
73. rarily save the changes click Set To load the configuration saved in the volatile memory click Reload OUUU 0 UM RedundConfig HiOS 2S 2A 3S RSPE 66 Release 4 0 07 2014 High availability Seamless Redun dancy HSR 5 2 HSR Network Structure Another possibility is to use the following CLI commands to configure the HSR devices 1 and 2 enable configure no mrp operation no spanning tree operation interface 1 1 no shutdown exit incertace 1 2 no shutdown exit Switch to the privileged EXEC mode Switch to the Configuration mode Disable the option Disable the option Change to the Interface Configuration mode of port 1 1 Enable the interface Switch to the Configuration mode Switch to the interface configuration mode for interface 1 2 Enable the interface Switch to the Configuration mode Use the following CLI commands to configure DANH 1 to process traffic for PRP network 1 LAN A hsr instance 1 mode modeu hsr instance 1 port a hsr instance 1 port b hsr instance 1 switching node type hsrreaboxprpa hsr instance 1 redbox id idla hsr instance 1 supervision evaluate hsr instance 1 supervision send hsr instance 1 supervision redbox exclusively hsr operation The HSR host forwards unicast traffic to the connected VDANSs and around the ring Activate the HSR Port A Activate the HSR Port B Enable the device to process traffic destine for LAN A of the PRP n
74. s are different from the ports used by HSR Open the Switching gt L2 Redundancy gt Spanning Tree gt Global dialog To disable the MRP function in the Operation frame Opera tion Off Open the Switching gt L2 Redundancy gt Spanning Tree gt Port dialog In the CIST tab deactivate the ports used for HSR in the Stp active column In the Guards tab deactivate the ports used for HSR in the Root Guard TCN Guard and Loop Guard columns O UO 0 0O 0 0 UU Note If you deactivate the HSR function then deactivate either Port A or B to help prevent network loops The device sends either its own HSR supervision packets exclusively or sends both its own supervision packets and packets of connected devices After installing new HSR devices deactivate this function to maintain a clear overview of the HSR supervision packets on remote devices I Open the Switching gt L2 Redundancy gt HSR gt HSR gt HSR gt Configuration dialog UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 65 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR To analyze received HSR supervision packets activate the Eval uate Supervision Packets checkbox in the Supervision Packet Receiver frame To transmit HSR supervision packets from this device activate Active in the Supervision Packet Transmitter frame L To transmit packets for VDANSs listed in the Switching gt L2 Red
75. s Redun 5 2 HSR Network Structure dancy HSR Figure 28 Connecting a PRP network to an HSR network HSR Redboxes use 2 interfaces for the HSR ring When configured to manage PRP traffic a third interface connects to a LAN of the PRP network The other interfaces provide HSR network access for VDANs The HSR RedBox lists the connected VDANs in the Switching gt L2 Redundancy gt HSR gt Proxy Node Table UM RedundConfig HiOS 2S 2A 3S RSPE 64 Release 4 0 07 2014 High availability Seamless Redun 5 2 HSR Network Structure dancy HSR PRP Network Connection Example Configuration The following example configures a simple HSR network with 3 HSR devices as shown in the previous figure Use the HSR RedBox configured in the previous example to connect the standard ethernet devices to the HSR ring HSR RedBox 1 sends 1 twin toward DANH 1 and 1 twin toward DANH 2 When the first frame of a pair arrives DANH 1 sends frame to PRP network 1 LAN A and DANH 2 sends the frame to PRP network 1 LAN B Deactivate STP on the PRP ports or globally Also deactivate MRP on the PRP ports or configure MRP on ports other than the PRP ports Use the HSR RedBox configured in the previous example for HSR RedBox 1 Perform the following steps on the DANH 1 and 2 Open the Switching gt L2 Redundancy gt MRP dialog To disable the MRP function in the Operation frame Opera tion Off Verify that the ports in Ring Port 1 and Ring Port 2 frame
76. s from the end devices and transmitting them over the Link Aggregation Group The frame distributor implements a distribution algorithm responsible for choosing the link used for transmitting any given frame or set of frames The hash option helps you achieve load balancing across the group The following list contains options which you set for link selection source MAC address VLAN ID EtherType and receiving port Destination MAC address VLAN ID EtherType and receiving port source Destination MAC address VLAN ID EtherType and receiving port Source IP address and Source TCP UDP port Destination IP address and destination TCP UDP port Source destination IP address and source destination TCP UDP port UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 109 Link Aggregation 7 1 Methods of Operation Static and Dynamic Links The device allows you to set up static and dynamic links 110 Static Links The administrator sets up and maintains the links manu ally For example when a link fails and there is a media converter between the devices the media converter continues forwarding traffic on the link causing the link to fail Another possibility is that cabling or an undetected configuration mistake causes undesirable network behavior In this case the network administrator manually changes the link setup to restore traffic Dynamic Links The device confirms that the setup on the remote device is able to handle link aggrega
77. scription textbox enter Link Backup 1 as the name for the backup pair O To activate the Fail Back function for the link backup pair mark the Fail Back Active checkbox Set the fail back timer for the link backup pair enter 30 s in Fail Back Delay s _ To activate the the link backup pair mark the Active checkbox To enable the Link Backup function globally in the Operation frame mark the On radio button enable Switch to the privileged EXEC mode configure Switch to the Configuration mode interface 2 3 Switch to the Interface 2 3 Configuration mode link backup add 2 4 Creates a Link Backup instance where port 2 3 is the primary port and port 2 4 is the backup port link backup modify 2 4 Defines Link Backup 1 as the name of the description Link Backup 1 backup pair link backup modify 2 4 fail Enables the fail back timer back status enable link backup modify 2 4 fail Defines the fail back delay time as 30 s back time 30 link backup modify 2 4 status Enables the Link Backup instance enable exit Switch to the Configuration mode link backup operation Enables the Link Backup function globally on the device UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 125 Readers Comments A Readers Comments What is your opinion of this manual We are always striving to provide as comprehensive a description of our product as possible as well as important information that will ensure troub
78. see figure 34 for determining the root path The administrator has specified a priority in the bridge identification for each bridge The bridge with the smallest numerical value for the bridge identification takes on the role of the root bridge in this case bridge 1 In the example all the sub paths have the same path costs The protocol blocks the path between bridge 2 and bridge 3 as a connection from bridge 3 via bridge 2 to the root bridge would result in higher path costs The path from bridge 6 to the root bridge is interesting The path via bridge 5 and bridge 3 creates the same root path costs as the path via bridge 4 and bridge 2 STP selects the path using the bridge that has the lowest MAC address in the bridge identification bridge 4 in the illustration There are also 2 paths between bridge 6 and bridge 4 The port identifier is decisive here Port 1 lt Port 3 UM RedundConfig HiOS 2S 2A 3S RSPE 80 Release 4 0 07 2014 Spanning Tree 6 3 Examples Root Bridge P BID 16384 Ed P BID 32 768 P BID 32 768 P BID 32 768 P BID 32 768 Port 3 MAC 00 01 02 03 04 06 304 0 7 7 E MAC 00 01 02 03 04 05 A 5 Port 1 e e e e m l P BID Priority of the bridge identifikation BID BID without MAC Address Root path P BID 32 768 Interrupted path Figure 35 Example of determining the root path Note Because the Administrator does not change the default values for the pri
79. t VLAN Configuration dialog Create VLAN 1 in the static VLAN table Tag the main ring ports for membership in VLAN 1 by selecting T from the dropdown list of the appropriate port fields For the devices participating in the subring use the step above and assign the ports to VLAN 2 in the static VLAN table Activate the MRP ring function for the main ring and subring devices Inthe Switching gt L2 Redundancy gt MRP dialog configure the 2 ring ports participating in the main ring on the main ring devices For the devices participating in the subring use the step above and configure the 2 ring ports participating in the subring on the subring devices Assign the same MRP domain ID to the main ring and subring devices If you use Hirschmann Automation and Control GmbH devices solely then the default values suffice for the MRP domain ID Note The MRP Domain is a sequence of 16 numbers in the range from 0 to 255 The default value is 255 255 255 255 255 255 255 p 25o Zoo Zoe Zoo s 20 a Zoo a 255 a Zoo Zoo cA MRP Domain consisting entirely of zeroes is invalid The Sub Ring dialog allows you to change the MRP domian ID if required or open the Command Line Interface CLI and proceed as follows enable Switch to the privileged EXEC mode configure Switch to the Configuration mode mrp domain delete Deletes the current MRP domain mrp domain add domain id Creates a new MRP domain with the s
80. t any link backup pairs Note Verify that the Spanning Tree Protocol is disabled on the Link Backup ports UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 121 Link Backup Operation On Off Primary Port Backup Port Description Primary Port Status Backup Port Status Fail Back Active Fail Back Delay s Active 2 3 Link_Backup_1 forwardin gl block ngl IZAI 30 v Figure 54 Link Backup dialog UM RedundConfig HiOS 2S 2A 3S RSPE 122 Release 4 0 07 2014 Link Backup 9 1 Fail Back Description 9 1 Fail Back Description Link Backup also allows you to set up a Fail Back option When you activate the fail back function and the primary link returns to normal operation the device first blocks traffic on the backup port and then forwards traffic on the primary port This process helps protect the device from causing loops in the network When the primary port returns to the link up and active state the device supports 2 modes of operation When you inactivate Fail Back Active the primary port remains in the blocking state until the backup link fails When you activate Fail Back Active and after the Fail Back Delay s timer expires the primary port returns to the forwarding state and the backup port changes to down In the cases listed above the port forcing its link to forward traffic first sends a flush FDB packet to the remote device The flush packet helps the remote device qui
81. tion and failover occurs automat ically UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Link Aggregation 7 2 Link Aggregation Example 7 2 Link Aggregation Example Connect multiple workstations using one aggregated link group between switch 1 and 2 By aggregating multiple links higher speeds are achievable without a hardware upgrade owitch 1 Switch 2 Server 2 8 Port 5 9 Server 1 Hub4 b Hub 1 Hub 5 Hub 2 Hub 6 l Hub 3 Figure 49 Link Aggregation Switch to Switch Network Use the following worksteps to setup switch 1 and 2 in the graphical user interface Open the switching gt L2 Redundancy gt Link Aggregation dialog L To make a new entry in the table click Create LI In the Create dialog select lag 1 from the Lag Index pull down menu Click OK To add available ports highlight the new entry and click Add Ports In the Select Ports to add dialog select ports 1 1 and 1 2 O Click OK enable Switch to the privileged EXEC mode configure Switch to the Configuration mode link aggregation add lag 1 Create a Link Aggregation group lag 1 link aggregation modify Adds port 1 1 to the Link Aggregation Group lag 1l addport 1 1 link aggregation modify Adds port 1 2 to the Link Aggregation Group lag 1 addport 1 2 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 111 Link Aggregation 7 2 Link Aggregation Example UM RedundConfig HiOS 2S 2A 3S RSPE 112
82. tivate the Eval uate Supervision Packets checkbox Perform the following steps in the Supervision Packet Transmitter frame To transmit PRP supervision packets from this device activate Active LI The device sends either its own PRP supervision packets exclu sively or sends both its own supervision packets and packets of connected devices To transmit packets for VDANSs listed in the Switching gt L2 Redundancy gt PRP gt DAN VDAN Table activate Send VDAN Packets When deactivated the device sends its own supervision packets exclusively After installing new PRP devices deactivate this function to maintain a clear overview of the PRP Supervision packets on remote devices To enable the ports in the Port A and Port B frames click On To enable the PRP function in the Operation frame click On To temporarily save the changes click Set To load the configuration saved in the volatile memory click Reload Open the Switching gt L2 Redundancy gt PRP gt Proxy Node Table dialog to view the terminating VDAN devices for which this device provides PRP conversion To remove this list click Reset To load the list of currently connected devices click Reload Open the Switching gt L2 Redundancy gt PRP gt Statisticsdialog to view the quality of the traffic that traverses the device The device detects errors and displays them according to MIB Managed Objects and the respective link
83. tivated globally and activated on all ports _ Switch Spanning Tree off on all devices in the network 1 Open the Switching gt L2 Redundancy gt Spanning Tree gt Global dialog L Switch off the function In the state on delivery Spanning Tree is switched on on the device Operation Protocol Version on off IRSTP Protocol Configuration Information Bridge Root Topology Bridge ID 32768 00 80 64 ca ff ee 32768 00 80 64 ca ff ee Bridge is Root Iv Priority 32768 zs o RotPor bo HeloTimets 2 f2 Root Path Cost o Forward Delay s hs hs o Topology Change Count booo Max Age Bo 000 Boo ooo Time Since Topology Change 0 day s 4 14 58 Tx Hold Count fi 0 BPDU Guard E Set Reload Help Figure 7 Switching the function off enable Switch to the privileged EXEC mode configure Switch to the Configuration mode no spanning tree operation Switches Spanning Tree off show spanning tree global Displays the parameters for checking UM RedundConfig HiOS 2S 2A 3S RSPE 24 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 5 Example Configuration LI Switch MRP on on all devices in the network Open the Switching gt L2 Redundancy gt MRP dialog Define the desired ring ports Operation on off Ring Port 1 Ring Port 2 Operation natCannected Operation notConnected Configuration Ring Manager C On Off Advanced Mode E Ring Recovery C 500ms 200ms LAN I
84. ubring global state on this device copy config running config Name the current configuration profile Test and 44 nvm profile Test save it in the non volatile memory UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 Parallel Redundancy Protocol PRP Unlike ring redundancy protocols PRP uses 2 separate LANs for uninter rupted availability On the path from the sender to the receiver PRP sends 2 data packets in parallel via the 2 mutually independent LANs The receiver processes the first data packet received and discards the second data packet of the pair The international standard IEC 62439 3 defines the Parallel Redundancy Protocol PRP Note If PRP is active it uses the interfaces 1 1 and 1 2 As seen in the Switching gt VLAN Switching gt Rate Limiter and Switching gt Filter for MAC Addresses dialogs the PRP function replaces the interfaces 1 1 and 1 2 with the interface prp 1 Configure the VLAN membership the rate limiting and the MAC filtering for the interface prp 1 UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 45 Parallel Redundancy Protocol PRP 4 1 Implementation 4 1 Implementation When the upper protocol layers send a data packet the PRP interface creates a twin packet from the original packet The PRP interface then transmits 1 data packet of the pair to each participating LAN simultaneously The packets traverse different LANs and theref
85. unction are active at the same time there is a risk that the redundancy function will not operate as intended UM RedundConfig HiOS 2S 2A 3S RSPE 16 Release 4 0 07 2014 Media Redundancy Protocol MRP 2 Media Redundancy Protocol MRP since May 2008 the Media Redundancy Protocol MRP has been a stan dardized solution for ring redundancy in the industrial environment MRP is compatible with redundant ring coupling supports VLANs and is distinguished by very short reconfiguration times An MRP Ring consists of up to 50 devices that support the MRP protocol according to IEC 62439 If you only use Hirschmann devices up to 100 devices are possible in the MRP Ring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 17 Media Redundancy Protocol MRP 2 1 Network Structure 2 1 Network Structure The concept of ring redundancy allows the construction of high availability ring shaped network structures With the help of the RM Ring Manager function the two ends of a backbone in a line structure can be closed to a redundant ring The ring manager keeps the redundant line open as long as the line structure is intact If a segment becomes inoperable the ring manager immediately closes the redundant line and line structure is intact again gt lt Figure 4 Figure 5 18 C ee ee ES a CaS Line structure Redundant ring structure RM Ring Manager main line redundant line UM RedundConfig Hi
86. undancy gt HSR gt DAN VDAN Table dialog activate Send VDAN Packets Use the following steps to configure DANH 1 1 Open the Switching gt L2 Redundancy gt HSR gt HSR gt HSR gt Configuration dialog To configure the device to forward unicast traffic around the ring and to the destination device set the HSR Mode to modeu To configure the device to forward traffic to PRP LAN A set the Switching Node Type to hsrredboxprpa To configure the device to forward traffic to PRP network 1 LAN A set Redbox Identity to idla To enable the ports in the Port Port A and Port Port B frames click On To disable the HSR function in the Operation frame click On To temporarily save the changes click Set To load the configuration saved in the volatile memory click Reload G e ob oo a GB Use the following configuration for DANH 2 L Open the Switching gt L2 Redundancy gt HSR gt HSR gt HSR gt Configuration dialog To configure the device to forward unicast traffic around the ring and to the destination device set the HSR Mode to modeu To configure the device to forward traffic to PRP LAN A set the Switching Node Type to hsrredboxprpb To configure the device to forward traffic to PRP network 1 LAN B set Redbox Identity to id1b To enable the ports in the Port Port A and Port Port B frames click On To disable the HSR function in the Operation frame click On To tempo
87. use of the network components or the associated operating software In addition we refer to the conditions of use specified in the license contract You can get the latest version of this manual on the Internet at the Hirschmann product site http www hirschmann com Printed in Germany Hirschmann Automation and Control GmbH Stuttgarter Str 45 51 72654 Neckartenzlingen Germany Tel 49 1805 141538 Rel 4 0 07 2014 25 07 2014 Contents Contents 2 1 2 2 2 3 2 4 2 9 3 1 4 4 1 4 2 4 3 4 4 4 9 4 6 Safety instructions About this Manual Key Network Topology vs Redundancy Protocols Network topologies 1 1 1 Meshed topology 1 1 2 Ring topology Redundancy Protocols Media Redundancy Protocol MRP Network Structure Reconfiguration time Advanced mode Prerequisites for MRP Example Configuration Mulitple Rings Subring 3 1 1 Subring description 3 1 2 Subring example 3 1 3 Subring example configuration Parallel Redundancy Protocol PRP Implementation LRE Functionality PRP Network Structure Connecting RedBoxes and DANPs to a PRP network Example Configuration PRP and Port Mirroring UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 11 13 14 14 15 16 17 18 19 20 21 22 33 34 35 42 45 46 47 49 51 52 59 Contents 5 1 92 6 2 6 3 6 4 6 5 6 6 7 1 1 2 High availability Seamless Redundancy HSR Implementation
88. vice receives the second frame of a pair after 400 ms then the device processes the frame instead of discarding it For this reason Hirschmann recommends that the number of nodes installed in your PRP network remain under 10 nodes Note If the inter frame gap is shorter than the latency between the 2 LANs a frame ordering mismatch can occur Frame ordering mismatch is a phenomenon of the PRP protocol The only solution for avoiding a frame ordering mismatch is to verify that the inter frame gap is greater than the latency between the LANs UM RedundConfig HiOS 2S 2A 3S RSPE 48 Release 4 0 07 2014 Parallel Redundancy Protocol PRP 4 3 PRP Network Structure 4 3 PRP Network Structure PRP uses 2 independent LANs The topology of each of these LANs is arbi trary and ring star bus and meshed topologies are possible The main advantage of PRP is zero recovery time with an active transit LAN When the terminal device receives no packets from one of the LANs the second transit LAN maintains the connection As long as 1 transit LAN is available repairs and maintenance on the other transit LAN have no impact on the data packet transmission The elementary devices of a PRP network are the RedBox Redundancy Box and the DANP Double Attached Node implementing PRP Both devices have 1 connection each to the transit LANs The devices in the transit LAN are conventional switches The devices transmit PRP data packets transpare
89. y you require Depending on the network topology selected you then choose from the redundancy protocols that can be used with this network topology UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 13 Network Topology vs Redundancy 1 1 Network topologies Protocols 1 1 Network topologies 1 1 1 Meshed topology For networks with star or tree topologies redundancy procedures are only possible in connection with physical loop creation The result is a meshed topology Uc OK xF i Xf 2 K xH Figure 2 Meshed topology Tree topology with physical loops For operating in this network topology the device provides you with the following redundancy protocols Rapid Spanning Tree RSTP UM RedundConfig HiOS 2S 2A 3S RSPE 14 Release 4 0 07 2014 Network Topology vs Redundancy 1 1 Network topologies Protocols 1 1 2 Ring topology In networks with a line topology you can use redundancy procedures by connecting the ends of the line This creates a ring topology AKHXHXHXHX e aD es sew esa D ea D 2s am aL D N S Figure 3 Ring topology Line topology with connected ends For operating in this network topology the device provides you with the following redundancy protocols Media Redundancy Protocol MRP High availability Seamless Redundancy HSR Rapid Spanning Tree RSTP UM RedundConfig HiOS 2S 2A 3S RSPE Release 4 0 07 2014 15 Network Topology vs Redundancy 1 2 Redundancy Protocols Pr

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