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Accton Technology 12mi User's Manual

1. ETHERHU 0 STACK 1 0 0 ETHERHUB3500 HUB 3 STACK 1 o O Remote Stack Link Up to 100 meters with twisted pair cable ETHAgHUB3500 HUB STACK 2 g LI ETHERH 00 HU STACK 2 o Remote Stack Link Up to 2 kilometers with fiber optic cable ETHERHUB3500 HUB STACK 3 o O ETHERHUB3500 HUB J FlexBus 3500 Cable STACK 3 o Figure 3 8 Connecting Remote Stacks Setting Up Network Connections Fast EtherHub 3500 System User s Guide Operating in the Novell NetWare IPX Environment If you re using Novell NetWare server as your Network Operating System you can have up to 3 LAN adapters installed in the File Server With this type of setup the network is perceived as logically divided into different collision domains but the File Server is still accessible by all nodes As shown in the following figure three LAN adapters installed in a NetWare server are each connected to a hub in the stack with IPX Protocol bound to each adapter The first adapter is attached to segment 1 with IPX network number 102 the second adapter is attached to segment 2 with IPX network number 103 and the third one is connected to segment 3 with IPX network number 104 Tren IPX net number 102 SEGMENT 1 Mm TANNIN SEGMENT 1 SEGMENT 2 N Ser SEGMENT 2 SEGMENT 3 IPX net number 104 NOVELL NetWare Server SEGMENT 3 SEGMENT 3 Figure 3 9 System Applied in Novell NetWare
2. o SEGMENT 1 Inter Segment Link AccView Station ETHAQHUB3500 HUB SEGMENT2 L ETHERHUB3S00 HUB SEGMENT 2 0 Inter Segment Link ETI HUB3500 HUB SEGMENT 3 o ETHE 3500 FlexBus 3500 Cable SEGMENT 3 0 Figure 3 7 Linking Segments in a Stacked System Setting Up Network Connections 3 11 Fast EtherHub 3500 System User s Guide Connecting Remote Stacks Fast EtherHub stacks can be connected by using the SmartExtender Modules For example you can connect two stacks by running a cable from the extender module in one stack to any station port in a remote stack When using twisted pair cable the maximum cable length is 100 meters Also note that when you connect directly to a repeater bus in this manner the transmission mode is limited to half duplex You can connect stacks over an even greater distance if you run fiber optic cable between SmartExtender Modules in both stacks When you connect to switching ports at both ends of the cable the transmission mode is automatically set to full duplex allowing you can run a fiber optic link up to 2 kilometers However if you must operate at half duplex then the maximum separation between stacks is 412 meters
3. Figure 2 2 Mounting Hubs Using a Mounting Rack Installing the System 2 3 Fast EtherHub 3500 System User s Guide Connecting the Hub System Remember to label all your connections at both ends of the cable to facilitate troubleshooting or future changes to network configuration The Fast EtherHub has 12 RJ 45 shielded ports i e 100BASE TX that support connections to 100 Mbps Fast Ethernet Ports 1 12 MDI X allow you to connect to devices such as a workstation server or router While Port 12 MDI lets you easily cascade to a compatible switch i e connecting from MDI to MDI X ports on either device This hub also provides an expansion slot for plugging in optional SmartExtender Modules These modules support a single connection to IOOBASE TX 10BASE T 100BASE T4 or 100BASE FX They provide a convenient way to attach to devices which use an alternate media type e g linking fiber optic cable to a remote device The transmission speed for ports on the optional 100BASE TX SmartExtender Module is automatically set at 10 or 100 Mbps to match the operating speed of the attached device Moreover the transmission mode of the ports on the optional 1OOBASE TX and 100BASE FX extender modules is automatically set at full or half duplex to match the optimum capability of the attached device Making a Connection via an MDI X Station Port You can connect an RJ 45 station port on the hub to any device tha
4. ms o HON Ou O FlexBus 3500 Cable Figure 3 4 Stacked Hubs Not Linked to a Segment If the Fast EtherHub 12mi is isolated from the backplane i e not attached to any of the 3 segments the stack can still be managed with the out of band configuration program via the management channel embedded in the FlexBus 3500 cable Setting Up Network Connections Fast EtherHub 3500 System User s Guide Extending the Network with Alternate Connections You can extend your network by connecting any of the hubs in a stacked system to other compatible hubs via the SmartExtender Module In the diagram below a stand alone hub is connected to hub 3 in the stacked system using the extender module However remember that the Fast EtherHub 3500 Agent can only manage hubs connected to it through the FlexBus connection Ene AGE SEGMENTI D1 o 51 O pe MANAGEMENT CHANNEL SEGMENT1 D2 o os SEG LINK 1 IH son SEG LINK 2 SEGMENT 2 O SEG LINK 3 EtherHi ID4 o EtherHuh3 HUB 4 or SEGMENT 3 Eiherl SEGMENT3 D6 o Ir EthefHub3500 FlexBus 3500 Cable ER Figure 3 5 Linking Stacked Hubs to Unmanaged Hubs via the SmartExtender Module Setting Up Network Connections 3 9 Fast EtherHub 350
5. Special Architecture Used for the Fast EtherHub 3500 Stack Multi Segment Architecture The Fast EtherHub 3500 system supports multi segment configuration through the FlexBus cabling Three Ethernet segments i e separate collision domains are embedded in the hub s FlexBus port i e the stack s backplane You can choose to attach a hub to one of these segments or to leave it isolated except for the management channel Nodes attached to a specific segment e g Segment 1 can only communicate with nodes attached to the same segment unless the segments are interconnected with a device such as an Ethernet switch This type of architecture makes the system more flexible provides better traffic load sharing and data protection improves network bandwidth utilization and simplifies troubleshooting Carefully plan your network setup to make this architecture work well for your system Form a common domain for devices that need to frequently communicate with each other by attaching them to the same segment In this way you can arrange network resources to balance traffic and thereby increase overall network efficiency To combine the segments into an interconnected network while at the same time retaining the higher effective bandwidth and segment integrity provided by the multi segment architecture attach each segment to a switch or similar interconnection device such as one of Accton s Fast Ethernet Switches Setting
6. Setting Up Network Connections Fast EtherHub 3500 System User s Guide Connecting to the Network Backbone The stack can be connected to the network backbone by attaching it to a device such as a Fast Ethernet switch The following figure shows a direct connection from the stack s daisy chain port to a 100BASE TX switch which is serving as collapsed network backbone SEGMENT1 EHE Nr cone ETHERHUB3500 HUB SEGMENT1 2 AccView Station ETHERHUB3500 HUB SEGMENT 2 O ETHERHUB3500 HUB SEGMENT 2 0 ETHERHUB3500 HUB SEGMENT 3 o ETHE 3500 HUI FlexBus 3500 Cable SEGMENT 3 0 Links to Network Fast Ethernet Switch Collapsed Backbone Figure 3 11 Connecting to the Network Backbone Setting Up Network Connections 3 15 Fast EtherHub 3500 System User s Guide Configuring IPX Trap Managers When the hub experiences an unusual event a message is issued to all listed network managers Networks compliant with Internetwork Packet Exchange NetWare IPX protocol can pass trap messages to IPX Trap Managers as shown below IPX Trap Managers Return to Previous Panel IPX Address Community Name Status 1 00 00 13 52 00 00 00 00 E8 90 public ENABLED 2 00 00 00 00 00 00 00 00 00 00 publ
7. D 1 D 1 D 1 D 2 D 3 D 3 D 4 xii Contents Fast EtherHub 3500 System User s Guide Underwriters Laboratories Compliance Statement D 4 Sicherheitshinweise D 5 Appendix E Product Support Services E 1 Product Registration E 1 Problem Report E 1 Hardware Repair Service E 1 Software Update and Upgrade Service E 2 Bulletin Board Service BBS E 2 Interactive Fast Fax U S A office E 3 Technical Support E 3 Limited Warranty E 4 Customer Remedies E 4 Return Process E 5 Accton Offices E 6 Ordering Information E 7 Glossary Index Contents xiii Fast EtherHub 3500 System User s Guide List of Figures Figure 2 1 Figure 2 2 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 Figure 3 9 Figure 3 10 Figure 3 11 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 4 10 Figure 4 11 Figure 4 12 Figure 4 13 Figure 4 14 Figure 4 15 Figure 4 16 Figure 4 17 Figure 4 18 Figure 4 19 Figure 4 20 Figure 4 21 Figure 4 22 Figure 4 23 Figure 4 24 Stacking Hubs without a Rack Mounting Hubs Using a Mounting Rack Attaching All Hubs in Stack to One Segment Attaching Hubs in Stack to Three Segments Linking Part of the Stacked Hubs to a Segment Stacked Hubs Not Linked to a Segment Linking Stacked Hubs to Unmanaged Hubs Linking Stacked Hubs to an NMS Linking Segments in a Stacked System Connecting Remote Stacks
8. Fast EtherHub 3500 System User s Guide Basic Features of Fast EtherHub 3500 System Basic Repeater Functions Outstanding Performance Extensive Management Capabilities In addition to all the features mentioned above the system provides Repeats all incoming frames to the connected segment Automatically partitions and reconnects devices which experience excessive collisions Jabber lockup protection provided by disabling any port that receives 64 Kbytes of continues data and re enabling the port after the condition improves Total bandwidth of up to 300 Mbps The backplane contains 3 separate Ethernet segments and a high speed management channel Manages up to 6 concentrators using the FlexBus stack cable An extensive indicator panel for reporting network activity and unit configuration and for facilitating problem diagnosis Menu driven configuration program can be accessed via a local or remote terminal connection to the hub s serial port The Fast EtherHub model with the SNMP agent supports in band network management using optional network management software such as Accton s Acc View Open not included with this package to monitor and control a stacked system Provides one serial 9 pin RS232 port for out of band or remote in band network management BOOTP support for dynamic address assignment Flash ROM on board the Fast EtherHub 12mi models for easily updating the SNMP agent 1 6 Product Over
9. After you are sure the module is properly seated in the bay tighten the retaining knobs to secure it in place 4 Connect power to the backup power supply Use separate AC circuits to provide optimal backup capability Note Leave at least 12 inches clearance in the back of the hub or stack to facilitate system maintenance e g removing power modules Installing the System 2 11 Fast EtherHub 3500 System User s Guide Powering on the Hub 1 Plug one end of the power cord into a power outlet and the other end into the power socket at the rear of the hub in that order for reasons of safety Then plug in the backup power module if you purchased this option For reliable backup connect the backup power module to a separate AC circuit 2 Check the LED indicator marked PWR1 or PWR2 on the front panel to see if itis on The unit will automatically select the setting that matches the connected input voltage Therefore no additional adjustments are necessary when connecting it to any input voltage within the range marked on the rear panel 3 The hub performs a self diagnostic test upon power on Note that this test takes about 15 seconds to complete For details about the system self diagnostic test refer to the following section The unit supports a hot remove feature which permits you to connect disconnect network cables without powering off the hub and without disrupting the operation of the hubs in stack Howev
10. The segment indicator will light up to show that it has been connected to the specified stack segment Power 1 Shows status of power module in Slot 1 as Operational Not Present or Failed Power 2 Shows status of power module in Slot 2 as Operational Not Present or Failed Position The physical position in the stack Type Indicates hub type as EH35121 TX or EH3512M TX H W Ver Indicates the current hardware version number of the repeater board FW Ver _Indicates the current firmware version number of the repeater board Status Defines the status of the Network Management Module as Primary or Backup Segment The backplane segment the NMM is attached to Note that the management agent does not have to be attached to the same segment as the repeater unit Bootup Option Specifies bootup method as NORMAL Use on board ROM code and default IP address TFTP DOWNLOAD Get system code from TFTP server and use default IP address BOOTP GET IP Get IP address from server and use on board ROM code BOOTP DOWNLOAD Get IP address and system code from server Image is stored in temporary memory NO BOOTP TFTP REQUEST Do notissue BOOTP request Wait for download via out of band BOOTP UPGRADE FIRMWARE Get IP address and system code from server Image is stored in nonvolatile memory and BOOTP option resetto NORMAL Note that this is the only in band option that places the image in nonvolatile memory
11. IPX Environment Setting Up Network Connections 3 13 Fast EtherHub 3500 System User s Guide Operating in the TCP IP Environment In TCP IP Internet environment gateways are used to improve performance and regulate network traffic by confining most network activity to their respective local network and still maintain communication links among LANs of the same or different architectures You can implement an IP subnet gateway if you have an IP network address e g 140 20 0 0 For example in a Fast EtherHub 3500 system as shown in the figure below you can attach three LAN adapters to your subnet gateway using a UNIX server Perform the following steps Assign IP addresses from 140 20 1 1 140 20 1 254 to nodes on segment 1 and set their subnet mask to 255 255 255 0 Assign IP addresses from 140 20 2 1 140 20 2 254 to nodes on segment 3 and set their subnet mask to 255 255 255 0 Assign IP addresses from 140 20 3 1 140 20 3 254 to nodes on segment 2 and set their subnet mask to 255 255 255 0 Assign IP address 140 20 1 10 to the first adapter 140 20 2 20 to the second adapter and 140 20 3 30 to the third one SEGMENT 1 SEGMENT 1 SEGMENT 1 SEGMENT 2 SEGMENT 2 IP 140 20 2 20 A 2 SEGMENT 2 IP 140 20 3 30 SEGMENT 3 SEGMENT 3 NOVELL NetWare Server SEGMENTS Unix Server e g SCO Unix SubnetMask 255 255 255 0 for all segments Figure 3 10 System Applied in TCP IP Environment
12. Main Menu Figure 4 25 Hub Statistics Hub Selection Menu Hub statistics can be used to check on the general health of your hardware and network connections If any of the error indications are extremely high e g collisions or CRC errors you should take appropriate measure to resolve the problem Hub Statistics Return to Previous Panel Refresh Statistics Hub ID 1 Position 1 Frames 20116 Bytes 3860016 Collisions 64 Alignment Errors 0 CRC Errors 0 Total Errors 0 Symbol Errors 0 Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 26 Hub Statistics Window 4 38 Configuring the System Fast EtherHub 3500 System User s Guide Displayed items are briefly described in the following table Hub ID Hub identifier within the stack Position The physical position in the stack as determined by its position from the top of the FlexBus chain Frames Number of frames passing through this device Bytes Number of bytes passing through this device Collisions Number of simultaneous node transmissions detected by this device Alignment Errors Number of mis synchronized data packets detected by this device CRC Errors Number of Ethernet Cyclic Redundancy Check errors detected by this device Total Errors Total number of errors including FCS alignment Fra
13. System Applied in Novell NetWare IPX Environment System Applied in TCP IP Environment Connecting to the Network Backbone Main Configuration Menu 12i only Configuration Menu for Extender Module 121 only Main Configuration Menu Screen Messages for System Resart System Information Menu SNMP Configuration Menu SNMP Communities Menu IP Trap Managers Menu IPX Trap Managers Menu Segment Configuration Menu Hub Configuration Hub Selection Menu Hub Configuration Menu Hub ID Configuration Menu Port Configuration Port Selection Menu Port Configuration Menu SEM Port Configuration Menu Port Backups Menu Port Intrusion Control Hub Selection Menu Port Intrusion Control Menu TFTP Download Menu Xmodem Download Menu User Passwords Menu Console Lockout Menu Segment Statistics Window 2 2 2 3 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 4 8 4 9 4 11 4 13 4 14 4 15 4 16 4 17 4 18 4 19 4 21 4 22 4 24 4 25 4 26 4 27 4 29 4 30 4 31 4 32 4 34 4 35 4 36 4 37 xiv Contents Fast EtherHub 3500 System User s Guide Figure 4 25 Hub Statistics Hub Selection Menu 4 38 Figure 4 26 Hub Statistics Window 4 38 Figure 4 27 Port Statistics Port Selection Menu 4 39 Figure 4 28 Port Statistics Menu 4 40 Figure 4 29 SEM Port Statistics Menu 4 42 Figure 5 1 Front Panel of EtherHub 12mi 5 1 Figure 5 2 Indicators for EtherHub 12mi 5 2 Figure 5 3 Rear Panel 5 15 Figure B 1 RJ 45 Connector
14. Table B 4 Table B 5 Table B 6 Table B 7 Table E 1 SEM Port Statistics Menu Power Indicator SmartExtender Module Indicator SmartExtender Module Indicators Interhub Indicator SNMP Indicator Management Agent Indicators Hub Indicators Serial Indicator Terminator Indicator Isolation Indicator Utilization Indicators Collision Indicators Partition Disable Indicators Link Traffic Indicators Diagnostic Indicators Diagnostic Results RJ 45 Pin Assignments DB9 Port Pin Assignments Full Pin Connection from Hub s 9 Pin Serial Port to PC s 9 Pin COM Port Three Pin Connection from Hub s 9 Pin Serial Port to PC s 9 Pin COM Port Full Pin Connection from Hub s 9 Pin Serial Port to PC s 25 Pin DTE Port Three Pin Connection from Hub s 9 Pin Serial Port to PC s 25 Pin DTE Port Hub s 9 Pin Serial Port to Modem s 25 Pin DCE Port Pin Assignments Parameters for SmartExtender Modules 4 42 5 2 5 2 5 3 5 3 5 5 5 6 5 7 5 7 5 7 5 8 5 10 5 11 5 12 B 1 B 2 B 3 B 3 B 4 B 4 B 5 E 7 xvi Contents Chapter1 Product Overview Introduction to Fast Ethernet Standard 10 Mbps Ethernet has served well for past generations of 80286 and 80386 machines performing simple file transfers However with the inevitable growth in corporate network size and the introduction of fully functional 32 bit PC architectures and operating systems running complex applications 10 Mbps Eth
15. Up Network Connections 3 1 Fast EtherHub 3500 System User s Guide FlexBus 3500 Management Link The management link in a chain of cascaded hubs must be connected to manage the stack as a single unit This means that only hubs connected using the FlexBus can be controlled by an SNMP management agent i e Fast EtherHub 12mi At most 6 hubs can be managed and linked together using the FlexBus connection Hub ID Setting In a stacked system each hub should have a unique ID number to identify itself Each hub automatically sets an ID number if attached to an SNMP management agent through the FlexBus port i e Fast EtherHub 12mi When a new hub is inserted in the stack the next available hub identifier is assigned to the new hub i e the identifier numbers are not changed for previously configured hubs When the stack includes a management agent you can also set hub IDs using the on board configuration program Refer to Configuring Hub Parameters in Chapter 4 for more information Using Management Agents The Fast EtherHub 12mi SNMP includes an SNMP management agent To add SNMP functionality to the entire stack this hub type must be included in the stack To provide in band access to the agent you must also attach your network management station to a the segment that includes the management agent Setting Up Network Connections Fast EtherHub 3500 System User s Guide The on board configuration program only p
16. a stack using a multi segment configuration In a stacked system some hubs may be connected to a segment while others are isolated not attached to any segment In this example hubs 1 and 2 are attached to segment 1 while hubs 3 and 4 are attached to segment 2 However hubs 5 and 6 are not connected to any segment These hubs form isolated segments With careful planning you can restrict access for specific user groups to required connections only SEGMENT 1 Ip E O MANAGEMENT Ether U A CHANNEL SEGMENT1 D2 D te SEG LINK 1 Ether TH SEG LINK 2 SEGMENT 2 103 o O SEG LINK 3 SEGMENT2 104 o H Ether ISOLATED ID5 ISOLATED ie o Sip o FlexBus 3500 Cable Figure 3 3 Linking Part of the Stacked Hubs to a Segment Ee When hubs are isolated they cannot communicate with any other device in the stack via the FlexBus Setting Up Network Connections 3 7 Fast EtherHub 3500 System User s Guide Isolating Each Hub In this example each hub in the stack is an independent segment i e isolated collision domain Hubs 2 to 6 are not connected to any of the 3 segments embedded in the FlexBus 3500 cable ID oS TE to O MANAGEMENT m2 o SP Oo O he 1 os AO a Ling oe ESO ooo ms o SPA O O
17. are briefly described in the following table Description The console lockout feature can be turned on or off The delay time for console lockout can set for any value in the range of 0 99 minutes Table 4 18 Console Lockout Menu Delay Time 4 36 Configuring the System Fast EtherHub 3500 System User s Guide Screen statistics are not automatically refreshed from the agent Select Refresh Statistics to update the displayed values The values displayed have been accumulated since the last system reboot or counter reset Segment Statistics Displays statistics for the stack s segments These values can be used to indicate the approximate load balance in your stack If the loading is severly unbalanced you may consider adjusting your network connections or segment assignments The Segment Statistics window is shown below Segment Statistics Return to Previous Panel Refresh Statistics Segment 1 Segment2 Segment 3 Frames 19271 0 0 Bytes 3767321 0 0 Collisions 57 0 0 Alignment Errors 0 0 0 CRC Errors 0 0 0 Total Errors 0 0 0 Symbol Errors 0 0 0 Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 24 Segment Statistics Window Displayed items are briefly described in the following table Refresh Statistics Fetch the current statistics stored in the agent s counters Frames Number of frames passing thro
18. be connected Verify the following installation requirements e Power requirements 100 to 240 VAC 10 at 50 to 60 Hz 3Hz The hub s power supply automatically adjusts to accept the input voltage level e The hub should be located in a cool dry place with at least 10 cm of space at the front and back for ventilation e Place the switch out of direct sunlight and away from heat sources or areas with a high amount of electromagnetic interference e If you intend to mount the hub on a rack make sure you have the mounting screws brackets bolts and nuts and the right tools e Be sure the network cables and connectors needed for installation are available Installing the System 2 1 Fast EtherHub 3500 System User s Guide Hardware Installation This hub is suitable for desktop or rack mount installation A good location is at the center of all the devices you want to link close to a collapsed backbone and near a power outlet These hubs can be stacked with other hubs using a mounting rack or directly on top of one another Refer to the sections on Stacking Hubs without a Rack or Mounting Hubs in a Rack for a description of these methods If you don t want to stack the hub with other hubs now or you plan to use the hub in a stand alone configuration go to the section on Connecting the Hub System Stacking Hubs without a Rack If you need to install a redundant power module refer to Installing a Bac
19. end to the MDI X port on the target device or vice versa When inserting an RJ 45 plug be sure the tab on the plug clicks into position to ensure that it is properly seated Note that as a general rule the length of any twisted pair cable should not exceed 100 meters Connecting Fiber Optic Cabling For the 100BASE FX module prepare fiber optic cable with SC or ST connectors at both ends When connecting the module directly to an end node device e g workstation or file server run cable from the Rx Tx port on the module to the Tx Rx port on the target device Also when daisy chaining SmartExtender Modules make similar connections between the current module and the next device in the stack When inserting a cable be sure the tab on the plug clicks into position to ensure that it is properly seated Note that as a general rule the length of fiber optic cable should not exceed 2 kilometers However power budgeting must be considered when calculating the maximum cable length for your specific environment as described later in this chapter Distance Limit and Power Loss in Fiber Optics When using fiber optic cabling the maximum length between two hubs can be up to 2 kilometers However you must consider power loss when calculating the actual length of cable that can be used with your system You can calculate power loss with the following formula p dB idB e EE cable length kilometers power budget
20. have made all the necessary connections e you can access any connected resources e the hub s indicators are functioning properly If you encounter any problems in installing the Fast EtherHub 3500 system refer to Chapter 2 for a detailed description of installation procedures or to Appendix A for help in troubleshooting vi Quick Installation About this Guide This guide is designed for the experienced network installer It describes how to install and operate Accton s Fast EtherHub 3500 system After reading this manual you should be able to use the front display panel and configure options to manage all your network connections This manual covers the following topics Chapter 1 Product Overview Brief description of Fast Ethernet followed by a description of this hub and a summary of its important features and specifications Chapter2 Installing the System Installing a Fast EtherHub 3500 and making basic network connections Also includes a description of significant components on the hub including ports and indicators Chapter 3 Setting up Network Connections Shows sample network configurations for a local area network Chapter 4 Configuring the System Describes how to manage the system via the on board configuration program Chapter5 Hardware Reference Detailed description of indicator panel and ports Appendices Troubleshooting cable assignments and product specifications About t
21. i e common collision domian the hub can communicate with all other devices attached to that segment Refer to the discussion on Mult S egment Architecture in Chapter 3 and to Configuring Hub Parameters in Chapter 4 A Fast EtherHub stack can be split into three separate isolated segments The best way to interconnect these different segments is to connect a 100BASE TX SmartExtender Module to a repeater port on a hub in a different segment using an MDI to MDI X connection Two extender modules can be used in this way to connect all three segments You can also make a direct connection between extender modules i e similar media types that exist in two different segments in the stack However this approach is not only more costly but also entails a slightly higher transit delay for trafffic passing between the segments The last alternative is to connect different segments via a Fast Ethernet switch or router Because this is the most expensive approach we do not advise it unless you already have a suitable interconnection device available Installing a Backup Power Supply If you need to install a backup power module take these steps 1 Remove the face plate on the optional power bay or a previously installed power module by turning the two retaining knobs on the rear panel counterclockwise 2 Holding the module level gently push it all the way into the empty bay ensuring that it firmly engages with the connector 3
22. immediately IPX Frame Type The selected format used on the LAN i e this type is that used by the IPX network where the hub is installed If the specified frame type is not detected the hub will automatically detect the current type Values 802 3 Ethernet II SNAP 802 2 Serial IP IP address used to access the on board configuration program via an out of band SLIP Internal IPX Network This address is composed of Net Number which identifies the IPX network number for the connected slot IP Protocol Protocol suite selection IPX Protocol Protocol suite selection SNMP over Ethernet Protocol suite selection Table 4 9 Segment Configuration Menu 4 20 Configuring the System Fast EtherHub 3500 System User s Guide Configuring Hub Parameters Use the Hub Configuration menu under the Configuration Panel to configure any hub in the stack This menu is used to configure the repeater and management modules Use the following menu to select the required hub or to change the numeric identifier for any hub in stack Hub Configuration Hub Selection Menu Return to Previous Panel Hub 1 Configuration Hub 2 Configuration Hub 3 Configuration Hub 4 Configuration Hub 5 Configuration Hub 6 Configuration Hub ID Configuration Display or work with hub ID configuration Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return t
23. intervening devices lp dB e g patch cables and splices dB cdB km___ loss per kilometer of cable Table 2 1 Calculating the Power Budget for Fiber Optics 2 8 Installing the System Fast EtherHub 3500 System User s Guide Note To determine the power loss incurred by intervening devices and specific cable type inquire with the manufacturer The power budget depends on the gauge of cable as shown below Gauge of Fiber Cable Power Budget 50 125 um 9 2 dB 62 5 125 pm SB Table 2 2 Power Budget for Common Guage Fiber Optics For a sample calculation assume the following values e cable gauge 62 5 125 um which means a 13 dB power budget e 2 patch panels along the path each with 1 5 dB power loss e 1 splice with 1 dB power loss and e inherent power loss in the cable is 4 dB km The maximum cable length is therefore m 13dB 4dB 225 km 4 dB km w When the 100BASE FX link is set for the full duplex communications i e a dedicated connection cable length should not exceed 2 kilometers However when the link is set for half duplex communications i e a shared collision domain cable length should not exceed 412 meters IEEE 802 3u Note Even though your calculations for power loss may indicate a longer permissible length based on signal strength as seen in the preceeding example we advise remaining within the recommended limits Maximum Segment Length In contrast t
24. on the Hub Side B 1 Figure B 2 DB9 Serial Port on the Hub Side B 2 List of Tables Table 2 1 Calculating the Power Budget for Fiber Optics 2 8 Table 2 2 Power Budget for Common Guage Fiber Optics 2 9 Table 2 3 Diagnostic Test Functions 2 13 Table 2 4 Checking Key LED Indicators 2 15 Table 2 5 Maximum Cable Length 2 16 Table 4 1 Configuration Options in Main Menu 12i only 4 9 Table 4 2 Configuration Options for Extender Module 12i only 4 10 Table 4 3 Main Configuration Menu 4 12 Table 44 System Information Menu 4 14 Table 45 SNMP Configuration Menu 4 15 Table 4 6 SNMP Communities Menu 4 16 Table 4 7 IP Trap Managers Menu 4 17 Table 4 8 IPX Trap Managers Menu 4 18 Table 49 Segment Configuration Menu 4 20 Table 4 10 Hub Configuration Menu 4 23 Table 4 11 Port Configuration Menu 4 26 Table 4 12 SEM Port Configuration Menu 4 28 Table 4 13 Port Backups Menu 4 30 Table 4 14 Port Intrusion Control Menu 4 31 Table 4 15 TFTP Download Menu 4 33 Table 4 16 Xmodem Download Menu 4 34 Table 4 17 User Passwords Menu 4 35 Table 4 18 Console Lockout Menu 4 36 Table 4 19 Segment Statistics Menu 4 37 Table 4 20 Hub Statistics Menu 4 39 Table 4 21 Port Statistics Menu 4 41 Contents xv Fast EtherHub 3500 System User s Guide Table 4 22 Table 5 1 Table 5 2 Table 5 3 Table 5 4 Table 5 5 Table 5 6 Table 5 7 Table 5 8 Table 5 10 Table 5 11 Table 5 12 Table 5 13 Table 5 14 Table 5 15 Table 5 16 Table 5 17 Table B 1 Table B 2 Table B 3
25. the hub check the following items e Be sure the media cable is properly attached to the connected device and the hub Verify that the cable connector snaps into place when attached e See if the media cable is functioning properly by using it for another port and attached device that displays valid indications when connected to the network Installing the System 2 15 Fast EtherHub 3500 System User s Guide e Verify that you have not exceeded the specified limits for any attached media type as summarized in the following table Media Type Maximum Length meters Twisted Pair 100 Fiber Opitc 412 at half duplex 2000 at full duplex Table 2 5 Maximum Cable Length e If a computer is attached to the hub verify that its adapter card is functioning properly by trying it in another computer that has been successfully connected to the network e When using the 100BASE TX or 100BASE FX SmartExtender Module both sides of each connection must use the same transmission mode i e full or half duplex If the device connected to the hub operates at full duplex but does not support auto negotiation then you must manually set the transmission mode with the configure button Refer to section on Communication Mode earlier in this chapter If you still can t resolve the problem please refer to Troubleshooting in Appendix A 2 16 Installing the System Chapter 3 Setting up Network Connections
26. trademarks of Accton Technology Corporation Other trademarks or brand names mentioned herein are trademarks or registered trademarks of their respective companies EH35121 TX EH3512M TX E1296 R01 150136 101 Package Contents Package Checklist Carefully unpack the contents of the package and verify them against the checklist given below This checklist applies to all the Fast EtherHub 3500 Series models unless otherwise specified M Fast EtherHub 12i Intelligent Fast Ethernet Stackable Hub with 12 100BASE TX Ports Model No EH35121 TX or Fast EtherHub 12mi SNMP Intelligent Fast Ethernet Stackable Hub with 12 100BASE TX Ports including SNMP Managment Support Model No EH3512M TX Two mounting brackets Four rubber foot pads One AC power cord One 20 cm FlexBus 3500 stack cable Installation manual A EQ KE R E KR Owner registration card Please inform your dealer immediately should there be any wrong missing or damaged parts If possible retain the carton including the original packing materials Use them again to repack the unit in case there is a need to return it for repair To qualify for product updates and product warranty registration fill in the Owner Registration Card and return it to Accton Technology Corporation Package Contents i Quick Installation These hubs are suitable for desktop or rack mounting Attach PCs to the station ports Attach each hub in the stack with Fle
27. 0 Configuring the System Fast EtherHub 3500 System User s Guide Position Authorized Address Intrusion Action Use the Port Intrusion Control Menu to define the MAC address for the device authorized to access a port and set the response type as shown in the following example Port Intrusion Control Return to Previous Panel Hub ID 1 Position 1 PortID Authorized Address Intrusion Action 1 00 00 00 00 00 00 INACTIVE 2 00 00 00 00 00 00 INACTIVE 3 00 00 00 00 00 00 INACTIVE 4 00 00 00 00 00 00 INACTIVE 5 00 00 00 00 00 00 INACTIVE 6 00 00 00 00 00 00 INACTIVE Ts 00 00 00 00 00 00 INACTIVE 8 00 00 00 00 00 00 INACTIVE 9 00 00 00 00 00 00 INACTIVE 10 00 00 E8 90 1B 73 WARNING amp DISABLE 11 00 00 00 00 00 00 INACTIVE 12 00 00 00 00 00 00 INACTIVE Return to previous panel Use arrow keys to move lt Enter gt to make changes lt Ctrl T gt to return to Main Menu Figure 4 19 Port Intrusion Control Menu Menu items are briefly described in the following table Hub identifier within the stack The physical position in the stack as determined by its position from the top of the FlexBus chain Selects any station port 1 12 on the hub Defines the MAC address thatis authorized to attach to this port Response to a detected intrusion can be set to INACTIVE no action taken WARNING trap message is issued to the management station or WARNING amp DISABLE trap message is
28. 0 System User s Guide Linking the Stack to a Management Station In a stacked system connect the in band management workstation to the same segment that the management agent is attached to In this example the management agent is attached to segment 1 Thus the in band management workstation e g a PC running AccView Open should also be connected to segment 1 SEGMENT 1 o Senn SEGMENT 1 MANAGEMENT CHANNEL EtherHub ue aaa atk SEG LINK 3 SEGMENT 2 0 te N EtherHub3 Hi o SEGMENT 3 SEG EtherHub3500 HUB EGMENT 3 0 gt AccView Station Segment 1 FlexBus 3500 Cable Figure 3 6 Linking Stacked Hubs to a Network Management Station 3 10 Setting Up Network Connections Fast EtherHub 3500 System User s Guide Interconnecting the Segments The 3 segments within a stacked system can be combined into an interconnected network using the SmartExtender Modules For example you can connect all the segments in the stack using just two extender modules as shown below Using this approach you provide a higher bandwidth by using three separate collision domains but still permit stations to communicate with nodes in other segments as required SEGMENT1 EHE Mn scone ETHERHUB3500 HUB
29. Basic configuration is provided by the on board configuration program 1 2 Product Overview Fast EtherHub 3500 System User s Guide This hub can be used in a stand alone configuration to form a simple Fast Ethernet LAN networking 2 to 12 computers using the RJ 45 station ports Further network expansion can be achieved using the embedded tri segment backplane the MDI daisy chain port or one of the optional SmartExtender Modules Moreover when stacked with other intelligent hubs through the FlexBus ports and connected to the Fast EtherHub 12mi SNMP management device it can be monitored and controlled through in band or out of band channels Fast EtherHub 12mi SNMP Intelligent Fast Ethernet Stackable Hub with 12 100BASE TX Ports including SNMP Managment Support This model conforms to both the IEEE 802 3u repeater specification and the Simple Network Management Protocol SNMP It not only functions as a 12 port Fast Ethernet repeater but also provides an on board SNMP based network management agent for monitoring and controlling various network components It can monitor up to 6 intelligent hubs connected to the same stack including itself through the FlexBus port connection This Fast EtherHub provides SNMP management for the connected stack via various Management Information Bases MIBs including MIB II repeater MIB and Accton s private MIB SmartExtender Module e 100BASE TX EM3551 TX Provides two RJ 43 p
30. Fast EtherHub 3500 System Installation and User s Guide Fast EtherHub 12i Fast EtherHub 12mi SNMP AccTon Installation and User s Guide Fast EtherHub 3500 System Intelligent Fast Ethernet Stackable Hub with 12 100BASE TX Ports including SNMP Management Support AccTon Copyright c 1996 by Accton Technology Corporation All rights reserved No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Accton Technology Corporation Accton makes no warranties with respect to this documentation and disclaims any implied warranties of merchantability quality or fitness for any particular purpose The information in this document is subject to change without notice Accton reserves the right to make revisions to this publication without obligation to notify any person or entity of any such changes Before operating this product please review the statements on electomagnetic emission interference and safety compliance in Appendix D AccTon International Headquarters USA Headquarters No 1 Creation Road III 1962 Zanker Road Science based Industrial Park San Jose CA 95112 Hsinchu 300 Taiwan R O C Phone 408 452 8900 Phone 886 3 5770 270 FAX 408 452 8988 FAX 886 3 5770 267 BBS 408 452 8828 BBS 886 3 5770 654 FAST FAX 408 452 881 1 Internet support accton com tw Accton EtherHub SmartWatch SmartExtender and AccView and are trademarks or registered
31. H W Ver Indicates the current hardware version number for the managment board FW Ver Indicates the current firmware version number for the managment board Physical Address MAC address of the management agent Table 4 10 Hub Configuration Menu Configuring the System 4 23 Fast EtherHub 3500 System User s Guide Hub ID Configuration To change the numeric hub identifier select Hub ID Configuration from the Hub Configuration Hub Selection Menu shown above The following Hub ID Configuration menu will appear After changing a hub identifier verify the change with the Enable Above Settings command Hub ID Configuration Return to Previous Panel Position Hub ID Du BbuNn Du un Enable Above Settings Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 13 Hub ID Configuration Menu 4 24 Configuring the System Fast EtherHub 3500 System User s Guide Configuring Port Parameters Use the Port Configuration menu under the Configuration Panel to configure the ports for any hub in the stack Select the port type for the required hub from the following menu Port Configuration Port Selection Menu Return to Previous Panel Select port to get configuration Hub ID Port ID ts NER EA REES RE ERBE 1 1 through 12 SEM 2 1 through 12 SEM 3 1 through 12 SEM 4 1 through 12 SEM 5 1 through 12 SEM 6 1 t
32. PX 802 2 FRAME Internal IPX Network AC B3 00 56 AC B3 00 56 AC B3 00 56 IP Protocol ENABLED ENABLED ENABLED IPX Protocol DISABLED DISABLED DISABLED SNMP Over Ethernet DISABLED DISABLED DISABLED IP configuration of segment 1 saved to EEPROM and enabled Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 10 Segment Configuration Menu Configuring the System 4 19 Fast EtherHub 3500 System User s Guide Menu items are briefly described in the following table Field A Description Segment Name _A name you can assign to the segment IP Configuration The hub system may be run on SNMP protocol over UDP IP transport protocol In this environment all systems on the Internet such as network interconnection devices and Network Management Stations e g the PC running AccView are assigned an IP address When accessing the hub from a remote site you will also have to assign an IP address to the management port IP Address IP address of the segment you re managing Subnet Mask Subnet mask of the agent you ve selected This mask identifies the host address bits used for routing to specific subnets Gateway IP Gateway used in passing trap messages from the hub agent to the management station connection to the management port Save to EEPROM This command saves the IP address for the selected segment in nonvolatile memory and makes it effective
33. Port 1 INACTIVE Return to previous panel Use arrow keys to move lt Enter gt to make changes lt Ctrl T gt to return to Main Menu Figure 4 17 Port Backups Menu Menu items are briefly described in the following table Identifier for up to 18 backup port pairs Pair member serving as the primary link Hub ID for the master port Port identifier for the master port Pair member serving as the backup link Hub ID for the slave port Port identifier for the slave port Each backup pair can be setto ACTIVE or INACTIVE BACKUP is displayed if the primary port is not currently linked STAND BY is displayed if the backup portis not currently linked Table 4 13 Port Backups Menu Configuring the System 4 29 Fast EtherHub 3500 System User s Guide Port Intrusion Control Use the Port Intrusion Control menu under the Configuration Panel to restrict access for any port to an authorized source address Select the required hub from the following menu Port Intrusion Control Hub Selection Menu Return to Previous Panel Hub 1 Port Intrusion Control Hub 2 Port Intrusion Control Hub 3 Port Intrusion Control Hub 4 Port Intrusion Control Hub 5 Port Intrusion Control Hub 6 Port Intrusion Control Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 18 Port Intrusion Control Hub Selection Menu 4 3
34. The workstation may communicate with the stack via a network connection or from a remote site using SLIP run over TCP IP If segmented architecture is used the network management station should be connected to the same segment as the SNMP management agent i e Fast EtherHub 12mi The minimal configuration for network management station includes a 386 workstation with 10MB of available space on the hard drive 2 MB on board memory a VGA display and Windows version 3 1 or higher 1 4 Product Overview Fast EtherHub 3500 System User s Guide Distinguishing Factors of Fast EtherHub 3500 System This system provides the following key features Provides multi segment architecture allowing the network to be split into three segments Supports fault tolerant configuration by allowing port link backup and agent backup Supports management functions via SNMP Supports on board management using Accton s proprietary Fast EtherHub 3500 System Configuration Program and full software configurable in band management using the optional Acc View Open network management software The on board management agents support nearly any network environment by providing management options via SNMP IP SNMP IPX and SNMP Ethernet Provides extensive security features including port intrusion protection as well as password protection for out of band access or in band telnet access Supports redundant power supply Product Overview 1 5
35. and unless also connected to the FlexBus management channel cannot be controlled by a management agent in the stack When connecting a hub to the expansion port the maximum cable length is 100 meters 8 If you do not have any available SmartExtender Modules 9 the different segments in a Fast EtherHub 3500 stack can also be combined into an interconnected network by running a cable from the hubs daisy chain ports 1 e using port 12MDI on hubs attached to the different segments to a network interconnection device such a switch or by running a cable from the hubs station ports i e using ports on hubs attached to different segments to a router You can also attach the overall stack to a network intercon nection device via the daisy chain port when connecting to a switch or via a station port when connecting to a router Run straight through twisted pair cable from the hub to the other device When attaching to a switch run cable from the MDI daisy chain port on this hub to any MDI X station port on the switch or vice versa Note When using the 12MDI daisy chain port remember that port 12X cannot be used Quick Installation Fast EtherHub 3500 System User s Guide Or attach to the extended network via the SmartExtender Module The SmartExtender Module can be used to attach to another network device that uses a different media type Attach the SmartExtender Module to a hub switch bridge or rou
36. bs are Class repeaters Class repeaters cannot be cascaded to another repeater in the same collision domain The daisy chain port can only be cascaded to another device which breaks up the collision domain e g an Ethernet switch Notes Making a Connection via the MDI Daisy Chain Port Stackable Fast Ethernet hubs are generally restricted to Class I repeater types due to the timing requirements for passing traffic and management data across the stack s backplane Although Class I repeaters cannot be cascaded to another device in the same collision domain via the daisy chain port more powerful interconnection options are provided via the hub s backplane and optional SmartExtender Modules The daisy chain port can only be cascaded to another device which breaks up the collision domain e g an Ethernet switch Prepare straight through 100Q Category 5 shielded or unshielded twisted pair cables with RJ 45 plugs at both ends Connect one end of the cable to the 12MDI port on this hub and the other end to a standard MDI X station port on the other device Remember that when using the daisy chain port 12MDI station port 12MDI X cannot be used When inserting an RJ 45 plug be sure the tab on the plug clicks into position to ensure that it is properly seated 1 Make sure the twisted pair cable does not exceed 100 meters 2 To connect to a switch you may also run straight through twisted pair cabling from a station por
37. cator will turn ON for all other hubs attached to the same segment that contain SNMP agents Note If you attach SNMP agents to separate segments be sure they are assigned unique IP addresses via on board configuration as described under Changing the Segment Configuration in Chapter 4 Installing the System Fast EtherHub 3500 System User s Guide Verifying Port Status Check each connection by viewing the port status indicators listed below For a more detailed description on these indicators refer to Chapter 5 LED State OO O dication S On Port has established a valid network connection Traffic Blinking Traffic is traversing the port Tx Rxt Blinking Traffic is traversing the port 100 On Communications have been set to a speed of 100 Mbps FDX On Communications have been setto full duplex mode 1 The indicators appear on the front of the SmartExtender Module Table 2 4 Checking Key LED Indicators If the Link status indicator is not functioning properly or you experience any other difficulties in setting up the switch refer to Appendix A Verifying System Operation Verify that all attached devices have a valid connection The hub monitors link status for each port If any device is properly connected to the hub and transmitting a link beat signal the Link indicator lights for the corresponding port If the Link indicator fails to light when you connect a device to
38. e following table Hub ID Hub identifier within the stack Position The physical position in the stack as determined by its position from the top of the FlexBus chain PortID Numeric identifier 1 12 or SEM e SmartE xtender Module Name User defined name for selected port Type Connection type for the repeater Ports 1 12 is LOOBASE TX Admin Status Any port may be set by the operator to ENABLED or DISABLED Oper Status Reflects the port s actual status as ENABLED or DISABLED Link State Indicates if the port has a valid connection to an external device Indicates if the port is partitioned Refer to Partition Disable Indicators in Chapter 5 for a more detailed description of the reasons a port may be partitioned Partition in 1 If the portis set to ENABLED by the administrator but used as a backup port Admin Status and Oper Status will differ Table 4 11 Port Configuration Menu 4 26 Configuring the System Fast EtherHub 3500 System User s Guide Configuring the SmartExtender Module If you select the SmartExtender Module i e SEM the SEM Port Configuration Menu will open This menu allows you to configure various communication parameters for this module SEM Port Configuration Return to Previous Panel Hub ID 1 Position 1 Port ID SEM Name Uplink Link State UP Type 100BASE TX Speed 10M Admin Status ENABLED Oper Status ENABLED Duplex M
39. e to the switching port located on hub s front panel if required However be sure you use a SmartExtender Module that meets your communication requirements Refer to SmartExtender Module in Chapter 1 for more details 4 To facilitate troubleshooting label all network cables to indicate the attached device and location Connecting to the Stack s Backplane Plug one end of the FlexBus 3500 stack cable provided with the base package in the Out port of the top hub and the other end to the In port of the next hub Repeat this step for each hub in the stack Form a simple chain starting at the Out port on the first hub and ending at the In port on the last hub Refer to FlexBus Ports in Chapter 5 for related information Hubs in a stack can only be grouped into segments through the FlexBus 3500 stack cable You should therefore use the FlexBus ports to make Out to In connections in a stack Hubs in a stack can only be managed by the network management agent through the stack cable In a managed stack you should therefore use the stack ports to make Out to In connections and include a management agent i e a Fast EtherHub 12mi in the chain You can also cascade hubs using the daisy chain port Port 12MD I However hubs cascaded using the daisy chain port cannot be managed by the management agent See the next section for details Installing the System 2 5 Fast EtherHub 3500 System User s Guide The Fast EtherHub 3500 hu
40. ent Setting Up Network Connections 3 5 Fast EtherHub 3500 System User s Guide Attaching the Stack to Multiple Segments This example shows 3 independent Ethernet LANs in a stacked system Hubs 1 and 2 are attached to segment 1 while hubs 3 and 4 are attached to segment 2 and hubs 5 and 6 are attached to segment 3 This configuration serves to both balance the network load and improve performance Using three separate segments provides 300 Mbps of Ethernet bandwidth to the overall stack Moreover using a segmented configuration serves to confine the effects of heavy loading or network problems to a single segment SEGMENT1 11 AO gt EtherH 0 SEGMENT1 m2 ef MANAGEMENT CHANNEL Etheruba500 SEGMENT2 1D3 m SEG LINK 3 EtherH HUB EIER SEGMENT2 a oil O fe Ether 50 SEGMENT3 D5 gt Eth SQI R SEGMENT3 16 o Sii D lal FlexBus 3500 Cable Figure 3 2 Attaching Hubs in Stack to Three Segments Traffic in each segment is restricted to that segment and cannot pass to another segment without a device such as a SmartExtender Module or one of Accton s Fast Ethernet Switches to link them Setting Up Network Connections Fast EtherHub 3500 System User s Guide Isolating Specific Hub Connections You can interconnect or isolate the hubs in
41. er when changing SmartExtender Modules or power supply modules first disconnect power to the concerned hub Diagnostic Tests Upon power on the system performs an internal self diagnostic test of major hub components If any component fails during the test the hub will try to complete the diagnostic procedure Otherwise the system will hang For related information refer to Diagnostics Test Indicators in Chapter 5 2 12 Installing the System Fast EtherHub 3500 System User s Guide Hot Remove Y The following table shows the components to be tested Test Function Component Fast EtherHub 12i Fast EtherHub 12mi Boot ROM All tests listed for Fast EtherHub 12i RAM for Repeater Board CPU Console 1 0 Repeater Information Base SRAM Flash ROM for SNMP Firmware Repeater Interface Controller EEPROM for Stack Configuration Routing Table for Internal SEM Port DRAM Buffer for Management P rogram Input Queue for Internal SEM Port Management Bus Output Buffer Output Queue for Internal SEM Port Management Bus Input Buffer Routing Table for External SEM Port Network Interface Controller Input Queue for External SEM Port Output Queue for External SEM Port Table 2 3 Diagnostic Test Functions The Fast EtherHub 3500 System supports hot remove capability that allows you to connect disconnect hubs or media connectors from the system with minimal disruption to the network You can remove any
42. er packets whose destination address is on the same segment as the source address This confines network traffic to its respective domain reducing the overall load on the network Configuration Options for the SmartExtender Modules Only the 100BASE TX and 100BASE FX media support full duplex operation The SmartExtender Modules can be connected to either a subnetwork or directly to a server or key workstation In addition to partitioning an overloaded network they provide a connection between legacy 10BASE T networks and the newer generation 100BASE TX and can be configured to operate in either full duplex or half duplex data transfer mode to support the interconnection requirements of other high speed devices These modules perform adaptive cut through switching which is capable of instantly forwarding or filtering a packet according to the destination address scanned from the packet header This technique transmits packets with near zero latency Product Overview 1 9 Fast EtherHub 3500 System User s Guide Switching Methods As a device functioning on the media access control MAC layer the extender modules are protocol independent and therefore compatible with IEEE802 3 IEEE802 3u TCP IP NetWare DECnet and XNS protocols They can provide a connection between conventional 10BASE T and high speed 100BASE TX networks or can serve as a 2 port bridge in a 100BASE TX or 100BASE FX environment Moreover where tradit
43. ernet has become a serious bottleneck With the recent flood of choices for upgrading media bandwidth 100 Mbps Fast Ethernet has become the most popular choice because of its low cost compatibility with existing Ethernet applications and the fact that it can run on top of an installed base of twisted pair cabling Moreover by using a dual speed switch 10 or 100 Mbps Fast Ethernet can be easily integrated into an existing 10 Mbps Ethernet environment with no need for protocol translation or changes to network software It also includes specifications for a media independent interface MII which permits a switched connection to any of the 100BASE T sublayers i e LOOBASE TX 10BASE T 100BASE FX or 100BASE TA Brief Description of the Fast EtherHub 3500 System The EtherHub 3500 System is a powerful and innovative LAN network enhancement and management product series Each component in the system supports a Fast Ethernet multi segment bus architecture that enhances traffic management and network bandwidth utilization This system offers the network manager a wide range of flexible configuration options allowing you to increase your network s bandwidth tenfold or more In addition the entire installation can be monitored and controlled via SNMP protocol through any network management station Product Overview 1 1 Fast EtherHub 3500 System User s Guide Full Connectivity Moreover the Fast EtherHub 3500 System prov
44. for auto configuration Product Overview 1 7 Fast EtherHub 3500 System User s Guide Complete Standards Conformance e Adapts to universal wide range voltage power i e 100V AC to 240V AC 10 50 60 3Hz e Provides a slot for an optional backup power supply e Conforms to IEEE 802 3u Class I repeater specification and 100BASE TX standard i e 100 Mbps Fast Ethernet e Optional SmartExtender Modules conform to relevant IEEE specifications and standards for respective media types e Supports MIB II Repeater MIB Ethernet MIB and Accton s private MIB e Conforms to Simple Network Management Protocol SNMP 1 8 Product Overview Fast EtherHub 3500 System User s Guide Data Switching with the SmartExtender Modules Switching Technology The SmartExtender Modules that plug into the expansion slot on the front panel of the Fast Ethernet 3500 series use advanced switching techniques to provide a high speed network backbone Each extender module acts as a two port Ethernet switch which effectively partitions the stack from the backbone The module scans the destination address from the packet header searches the routing table provided for the incoming port and forwards the packet only if required often before fully received A learning function stores the address and corre sponding segment identifier of each incoming and outgoing packet in a routing table This information is subsequently used to filt
45. he System Diagnostics section in Appendix A provides help on troubleshooting The Port Statistics window is shown below Hub ID 1 Port ID 10 Readable Frames Readable Octets FCS Errors Alignment Errors Frames Too Long Short Events Runts Collisions Port Statistics Return to Previous Panel Refresh Statistics 20524 3904366 0 UNDooo Position 1 Late Events 0 Data Rate Mismatches 0 Auto Partitions 0 Total Errors 0 LSA Changes 1 Last Source Address 00 00 E8 90 1B 73 Symbol Errors 0 Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 28 Port Statistics Menu 4 40 Configuring the System Fast EtherHub 3500 System User s Guide Displayed items are briefly described in the following table Field Description Hub ID Hub identifier within the stack Position The physical position in the stack as determined by its position from the top of the FlexBus chain Port ID Port identifier on the hub Number o Number o Readable Frames Readable Octets FCS Errors Alignment Errors Frames Too Long good frames received good octets received Number of Frame Control Sequence errors Number of mis synchronized data packets detected by this device Number of times frame length has exceeded the maximum allowable size i e 1518 bytes Short Events Numbe
46. his Guide vii Contents Chapter 1 Product Overview 1 1 Introduction to Fast Ethernet 1 1 Brief Description of the Fast EtherHub 3500 System 1 1 Distinguishing Factors of Fast EtherHub 3500 System 1 5 Basic Features of Fast EtherHub 3500 System 1 6 Data Switching with the SmartExtender Modules 1 9 Switching Technology 1 9 Configuration Options for the SmartExtender Modules 1 9 Switching Methods 1 10 Chapter 2 Installing the System 2 1 Pre Installation Requirements 2 1 Hardware Installation 2 2 Stacking Hubs without a Rack 2 2 Mounting Hubs in a Rack 2 3 Connecting the Hub System 2 4 Making a Connection via an MDI X Station Port 2 4 Connecting to the Stack s Backplane 2 5 Making a Connection via the MDI Daisy Chain Port 2 6 Connecting to a SmartExtender Module 2 6 Installing a Backup Power Supply 2 11 Powering on the Hub 2 12 Diagnostic Tests 2 12 Hot Remove 2 13 Configuring a Manageable Stack 2 14 Installing an SNMP Backup Agent 2 14 Verifying Port Status 2 15 Verifying System Operation 2 15 Contents ix Fast EtherHub 3500 System User s Guide Chapter 3 Setting up Network Connections Special Architecture Used for the Fast EtherHub 3500 Stack Multi Segment Architecture FlexBus Management Link Hub ID Setting Using Management Agents Port Backup Function Security Features Sample Network Configurations Attaching the Stack to One Segment Attaching the Stack to Multiple Segments Isolating Specific Hub Connections Is
47. hrough 12 SEM Display or work with hub 1 ports 1 through 12 configuration Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 14 Port Configuration Port Selection Menu Configuring the System 4 25 Fast EtherHub 3500 System User s Guide Configuring Repeater Ports If you select the repeater port type i e 1 through 12 the Port Configuration Menu will open This menu displays the ID and stack position of the selected hub and also allows you to enable disable any repeater port in the selected hub Port Configuration Return to Previous Panel Hub ID 1 Position 1 Port ID Name Type Admin Status Oper Status Link State Partition 1 100BASE TX ENABLED ENABLED DOWN NOT PART 2 100BASE TX ENABLED DISABLED DOWN NOT PART 3 100BASE TX ENABLED ENABLED DOWN NOT PART 4 100BASE TX ENABLED ENABLED DOWN NOT PART 9 100BASE TX ENABLED ENABLED DOWN NOT PART 6 100BASE TX ENABLED ENABLED DOWN NOT PART a 100BASE TX ENABLED ENABLED DOWN NOT PART 8 100BASE TX ENABLED ENABLED DOWN NOT PART 9 100BASE TX ENABLED ENABLED DOWN NOT PART 10 Steve 100BASE TX ENABLED ENABLED UP NOT PART 11 100BASE TX ENABLED ENABLED DOWN NOT PART 12 100BASE TX ENABLED ENABLED DOWN NOT PART Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 15 Port Configuration Menu Menu items are briefly described in th
48. ic DISABLED 3 00 00 00 00 00 00 00 00 00 00 public DISABLED 4 00 00 00 00 00 00 00 00 00 00 public DISABLED 5 00 00 00 00 00 00 00 00 00 00 public DISABLED Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 9 IPX Trap Managers Menu Menu items are briefly described in the following table Field IPX Address Description IPX address of the trap receiver Provide dotted decimal notation with both the network and MAC address components string required for trap management access The status of the current entry can be set to ENABLED or DISABLED Table 4 8 IPX Trap Managers Menu 4 18 Configuring the System Fast EtherHub 3500 System User s Guide Changing the Segment Configuration When accessing the EtherHub system with in band tools such as SNMP Telnet or TFTP you must configure the hub to use IP IPX or SNMP over Ethernet protocols Use the Segment Configuration menu to display the following screen Segment Configuration Return to Previous Panel Segment 1 Segment 2 Segment 3 Segment Name R amp D IP Configuration IP Address 203 70 236 1 203 70 236 2 203 70 236 3 Subnet Mask 255 255 255 0 255 255 255 0 255 255 255 0 Gateway IP 203 70 236 254 0 0 0 0 0 0 0 0 Serial IP 203 70 236 9 0 0 0 0 0 0 0 0 Save to EEPROM Save to EEPROM Save to EEPROM IPX Frame Type IPX 802 2 FRAME IPX 802 2 FRAME I
49. ides advanced network security features including Intrusion Protection which ensures that only designated workstations are able to transmit packets onto the network Management access via the out of band serial port or in band via telnet is also password protected The basic components of this network system include e Provides 12 RJ 45 MDI X 100BASE TX Fast Ethernet shielded station ports for connecting devices to the network using straight through shielded or unshielded twisted pair cable 100Q Cat 5 UTP or 100Q STP e 1 RJ 45 MDI daisy chain port for connection to a switching hub eliminating the need for crossover cables e 1 slot for optional SmartExtender Modules which provide a connection to LOOBASE TX 10BASE T 100BASE T4 or 100BASE FX via a switching port e A multi segment bus architecture that enhances traffic management and network bandwidth utilization e 2 FlexBus ports for connecting to other hubs in a Fast EtherHub 3500 stack via FlexBus 3500 stack cable e On board management via the RS232 serial port connected directly to a terminal or to a local or remote computer that provides a standard RS232 port The specific components are the Fast EtherHub 12i Intelligent Fast Ethernet Stackable Hub with 12 100BASE TX Ports The Fast EtherHub 121 conforms to the IEEE 802 3u repeater specification It also serves as an intelligent hub which collects port statistics and records events for system administration
50. in configuring network connections This hub can be used as a simple stand alone hub or connected to other network interconnection devices in various configurations This section includes sample applications most of which take advantage of the multi segment architecture Pay attention to the examples that illustrate how to segment a hub stack This procedure can extend network bandwidth up to 300 Mbps Attaching the Stack to One Segment You can attach all the hubs in a stacked system to the same segment In this example a stacked system using the FlexBus port connection is connected to segment 1 Putting all hubs in the same segment groups all nodes attached to the stack in a single collision domain All Ethernet frames transmitted by any node are seen by every other node in the stack For a heavily loaded network you can significantly improve performance by configuring the stack into separate segments as shown in the next example 1 SEGMENT1 1 o een N MANAGEMENT CHANNEL EtherHub3 SEGMENT 1 1D2 EtherHu UR E SEGMENT1 9 0 I EtherHul H A SEGMENT 1 1D4 fo fl SEG LINK 1 SEG LINK 2 ai SEG LINK 3 EtherHub3500 HUB SEGMENT1 5 o l EtherHub3500 HUB SEGMENT1 p o O FlexBus 3500 Cable Figure 3 1 Attaching All Hubs in Stack to One Segm
51. ional 100BASE TX networks restrict the maximum distance between end nodes to 205 meters these modules break down this barrier By breaking your network into smaller and more manageable segments each linked to the larger network with a SmartExtender Module the maximum distance for communications between end nodes is unlimited depending on the specific timing requirements of your network applications Traditional bridges and routers use a switching method called store and forward in which the entire frame must be received before performing a table look up for the destination node and forwarding the packet to the corresponding port As a result each packet experiences a hefty delay It may be necessary to use store and forward when a lot data errors are occurring over the network or when connecting to very slow devices Compared to this conservative mode of operation fragment free cut through switching significantly reduces packet transmission delay by picking the destination address out of the header as soon as the first full 64 bytes has been received This technique directs the frame to the appropriate segment long before the full packet has been received It also cleans up the data stream by preventing runts from being passed along thereby improving data reliability Although fragment free cut though switching is recommended as the fastest method for most applications store and forward is also supported by the SmartExtender Module
52. ious panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 20 TFTP Download Menu 4 32 Configuring the System Fast EtherHub 3500 System User s Guide Menu items are briefly described in the following table Download Server IP IP address of a TFTP server TFTP stands for Trivial File Transfer Protocol Download Filename The bin file to download Download Mode You can download to permanent flash ROM or temporary storage in RAM for test purposes However if you download to temporary memory this firmware will be lost upon power off To update new agent firmware for permanent use it must be downloaded to flash ROM Start TFTP Download Initiates download process Table 4 15 TFTP Download Menu Configuring the System 4 33 Fast EtherHub 3500 System User s Guide Xmodem Download Use the Xmodem Download menu under the Configuration Panel to download firmware to the hub The Xmodem protocol is used to transfer binary files over a PC connection i e using terminal emulation or modem access software Specify the download mode and select Process Download Open the file transfer utility in your terminal emulation or modem access program specify the filename and then start file transfer When transferring files from you computer be sure you specify Send or Upload file The file should be a binary file from Accton othe
53. issued and port is disabled Note If a port is disabled by an unauthorized intrusion attempt it must be manually re enabled _using the Oper Status field in the Port Configuration menu Table 4 14 Port Intrusion Control Menu Configuring the System 4 31 Fast EtherHub 3500 System User s Guide Downloading System Software via a TFTP Server Use the TFTP Download command under the Configuration Panel to download firmware updates into the hub You may upgrade firmware from a server attached to the local network or remotely via a serial link using TFTP over SLIP Specify the IP address for the TFTP server the filename and the download mode The download file should be a binary file from Accton otherwise the agent will not accept it Also be sure that you have already set the required bootup option for the target hub under the Hub Configuration menu Download status is indicated by messages at the bottom of the screen Firmware is first loaded into a temporary buffer If you selected download for permanent use it will then be transferred to nonvolatile memory After you download the firmware the agent will be reset and you will have to log back into the con figuration program again The following screen shows an example of the TFTP download menu TFTP Download Return to Previous Panel Download Server IP 203 70 236 12 Download Filename acc110 bin Download Mode PERMANENT Start TFTP Download Return to prev
54. kup Power Supply on page 2 11 and complete that procedure before stacking the hub The hub can be stacked anywhere there is a sufficiently large flat space such as on a table or desktop 1 Stick the self adhesive rubber foot pads that come with this package on each of the 4 hollow spaces located on the bottom of the first hub 2 Place the first hub on a firm and flat surface in the area where you want the stack to be installed 3 Attach the rubber feet on each hub before stacking them They cushion the hub against shock vibrations and provide space between each hub for ventilation Fast EtherHub 3500 Stack up to 6 hubs fi Figure 2 1 Stacking Hubs without a Rack 2 2 Installing the System Fast EtherHub 3500 System User s Guide Mounting Hubs in a Rack If you need to install a Please comply with the following instructions to ensure that redundant power module refer to Installing a Backup your hub is securely mounted in the rack Power Supply on page 2 11 5 and ee thet procaine 1 Use an standard EIA 19 inch rack before stackingth hub 2 Use a Phillips i e cross head screwdriver to attach the brackets to the sides of the hub 3 Position the hub in the rack by lining up the holes in the brackets with the appropriate holes on the rack and then use the supplied screws to mount the hub in the rack Fast EtherHub 3500 Stack up to 6 hubs GA lt
55. mesTooLong ShortE vents LateE vents J abber and DataRateMismatches detected on this device Symbol Errors Number of symbol errors i e code group errors including collision artifacts or transmission errors Note that these errors are unique to 100 Mbps analog signals Table 4 20 Hub Statistics Menu Port Statistics Displays statistics for any port in the stack Select the required port from the following menu Port Statistics Port Selection Menu Return to Previous Panel Select port to get statistics Hub ID Port ID AS A A set Pete a ee oe fees 1112345678910 11 12 SEM 2 1 12345678910 11 12 SEM 3 1123456789 10 11 12 SEM 4 1123456789 10 11 12 SEM 5 1 123456789 10 11 12 SEM 6 1123456780910 11 12 SEM Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 27 Port Statistics Port Selection Menu Configuring the System 4 39 Fast EtherHub 3500 System User s Guide Screen statistics are not automatically refreshed from the agent Select Refresh Statistics to update the displayed values The values displayed have been accumulated since the last system reboot or counter reset Statistics for Repeater Ports Statistics for repeater ports covers a wide range of Ethernet variables If any of the error indications are extremely high there may be a problem with the port the attached device or the network cabling T
56. n use based on the results of auto negotiation When the internal buffers on this port begin to fill it can be configured to signal the connected device to slow transmission by setting this field to ENABLED Forwarding Mode The scheme by which frames are processed and forwarded through this module can be set to Adaptive Cut through or Store and Forward Back Pressure Forwarding In Use Indicates the actual forwarding mode in use based on the current error rate 1 If the port is set to ENABLED by the administrator but used as a backup port Admin Status and Oper Status will differ Table 4 12 SEM Port Configuration Menu 4 N Configuring the System Fast EtherHub 3500 System User s Guide Backup Set Primary Port Action Defining Backup Ports Use the Port Backups menu under the Configuration Panel to define up to 6 master slave port pairs If the connection to the master port fails the slave port will automatically take over For greater reliability primary and secondary ports should be located on different hubs Use the following menu to specify and activate port backup pairs Port Backups Return to Previous Panel Backup Set Primary Port Secondary Port Action 1 Hub 1 Port 1 Hub 1 Port 1 INACTIVE 2 Hub 1 Port 4 Hub 1 Port 1 INACTIVE 3 Hub 1 Port 1 Hub 1 Port 1 INACTIVE 4 Hub 1 Port 1 Hub 1 Port 1 INACTIVE 5 Hub 1 Port 1 Hub 1 Port 2 INACTIVE 6 Hub 1 Port 2 Hub 1
57. network cabling without affecting traffic passing across the internal repeater bus However if the FlexBus 3500 stack cable is disconnected at any point in the stack or is not properly terminated all Ethernet and management traffic passing across the stack s backplane will be disrupted When changing modules in the expansion slot or changing power supply modules first disconnect power to the concerned hub Installing the System 2 13 Fast EtherHub 3500 System User s Guide Configuring a Manageable Stack The on board configuration program only provides access to the private MIB To gain full SNMP functionality you must use optional network management software e g AccView Open To manage the stack with the on board configuration program or any optional network management software the stack must include an EtherHub 12mi i e a unit with an SNMP agent Moreover the network management station must be able to access the segment containing the management agent You should also consider adding a backup SNMP agent to provide greater management reliability for critical applications The procedures required to install a backup agent is described below Installing an SNMP Backup Agent Just add the backup agent s to the stack and let the system automatically choose the Master agent and the Slave agent based on longest up time The Master indicator on the device chosen as the primary agent will turn ON The Backup indi
58. ng functions which automatically learns node addresses required to filter and forward traffic based on the destination address i e traffic is filtered if the destination address is in the local collision domain or forwarded if the destination is in another segment Note Devices connected to the SmartExtender Module exist in a separate segment and cannot be controlled by a management agent in the stack Switching Functions These modules also provide functions commonly found on an Ethernet switch The scheme used to process data packets is automatically adjusted to optimize system performance Fragment free cut through or store and forward processing may be used depending on the current error rate Refer to Data Switching with the SmartE xtender Modules in Chapter 1 for a detailed discussion of these processing methods In addition to the features listed above the extender modules also use back pressure to eliminate frame loss when its buffers fill by slowing the traffic received from end stations or segments connected directly to this port 2 10 Installing the System Fast EtherHub 3500 System User s Guide SEM RI 45 SEM RI 45 SEG1 SEG2 SEG3 This stack has been fully interconnected using two extender modules Interconnecting Stack Segments Hubs can be completely isolated from the stack or can be attached to any of the three available segments embedded in the backplane When attached to a segment
59. nistrator is the only user with write access for agent parameters You should therefore assign a password to administrator as soon as possible and store it in a safe place The User Passwords menu is shown below User Passwords Return to Previous Panel User Type User Name Password Admin admin pluto Guest guest Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 22 User Passwords Menu Menu items are briefly described in the following table Description There are only two fixed user types Admin and Guest The respective access rights are Read Write and Read Only User Name The login name required for access to the management agent not case sensitive Password The password that must be provided with the user name to access the system not case sensitive Table 4 17 User Passwords Menu User Type Configuring the System 4 35 Fast EtherHub 3500 System User s Guide Console Lockout This function instructs the configuration program to automatically lock the console if no keyboard input is detected for the defined delay time The Console Lockout menu is shown below Console Lockout Return to Previous Panel Status ON Delay Time 20 Minutes Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 23 Console Lockout Menu Menu items
60. o Main Menu Figure 4 11 Hub Configuration Hub Selection Menu Configuring the System 4 21 Fast EtherHub 3500 System User s Guide Hub Configuration To configure a hub select it from the list shown above The following Hub Configuration menu will appear allowing you to set parameters for the base repeater unit or the network management module Hub Configuration Return to Previous Panel HubID 1 Position 1 Name H W Group Type EH3512M TX Segment 1 H W Ver 0 Status ATTACHED F W Ver 1 05 Power 1 OPERATIONAL Power2 NOT PRESENT Network Management Module NMM Status PRIMARY H W Ver 4 Segment 1 F W Ver 1 09 Bootup Option NORMAL Physical Address 00 04 AC B3 00 31 Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 12 Hub Configuration Menu 4 22 Configuring the System Fast EtherHub 3500 System User s Guide Menu items are briefly described in the following table Board Field p Repeater Unit Hub ID Hub identifier within the stack Up to 6 hubs may be connected via the FlexBus Network Management Module NMM management channel Name Any user defined name for the selected hub Status The hub may be isolated from the backplane or attached to the backplane Segment Attach the hub to a specified segment 1 3
61. o cascading devices through repeater ports cascading through the SmartExtender Module breaks up the collision domain The number of devices that can be cascaded is therefore theoretically unlimited However in practice the length of a cascade even one passing through switching ports as implemented in the extender modules may be limited by the time out requirements of the particular applications running over the network Considering these delay factors the IEEE 802 1D standard i e RFC for MAC bridges recommends restricting the number of interconnection devices between any two nodes to seven Installing the System 2 9 Fast EtherHub 3500 System User s Guide Setting the Communication Mode The 100BASE TX and 100BASE FX SmartExtender Modules both support half and full duplex communications The hub uses auto negotiation to determine the transmission mode for any new connection made to these modules However if a connected device does not also support auto negotiation and a link cannot be established using half duplex i e the last state tested by auto negotiation then you must manually set the transmission mode for the concerned port to full or half duplex via on board configuration Chapter 4 or using optional network management software Bridging Functions The SmartExtender Modules form a separate segment i e collision domain from the rest of the ports in the stack They therefore provide fully transparent bridgi
62. ode HALF DUPLEX Duplex In Use HALF DUPLEX Back Pressure DISABLED Forwarding Mode STORE AND FORWARD Forwarding In Use STORE AND FORWARD Return to previous panel Use arrow keys to move lt Enter gt to make changes lt Ctrl T gt to return to Main Menu Figure 4 16 SEM Port Configuration Menu Configuring the System 4 27 Fast EtherHub 3500 System User s Guide Menu items are briefly described in the following table A Description O O O O O O O O O O O OOOO O Hub ID Hub identifier within the stack Position The physical position in the stack as determined by its position from the top of the FlexBus chain Port ID Identifies this port as the SmartExtender Module Name User defined name for selected port Link State Indicates ifthe port has a valid connection to an external device Type Connection types for the SmartExtender Module include 100BASE TX 10BASE T 100BASE T4 100BASE FX Speed The 100BASE TX module relies on auto detection to set the speed at 10 or 100 Mbps while the 100BASE T4 and 100BASE FX modules are fixed at 100 Mbps Admin Status Any port may be set by the operator to ENABLED or DISABLED Oper Status Reflects the port s actual status as ENABLED or DISABLED Duplex Mode The extender module for 100BASE TX 10BASE T and 100BASE FX can be set to half or full duplex Duplex In Use Displays the actual duplex mode i
63. ol 4 30 Downloading System Software via a TFTP Server 4 32 Xmodem Download 4 34 Changing User Passwords 4 35 Console Lockout 4 36 Segment Statistics 4 37 Hub Statistics 4 38 Port Statistics 4 39 Chapter 5 Hardware Reference 5 1 Indicator Panel 5 2 Power Indicator 5 2 SmartExtender Module Indicator 5 2 Interhub 5 3 SNMP 5 4 Segment Indicators 5 4 Management Agent Indicators 5 5 Hub ID Indicator 5 5 Serial 5 6 Terminator 5 7 Isolation 5 7 Utilization Indicators 5 7 Collision Indicators 5 8 Port Status Indicators 5 10 Diagnostic Test Indicators 5 11 Contents xi Fast EtherHub 3500 System User s Guide Network Connections Station Ports Daisy Chain Port Serial Port Rear Panel Components Power Supply Modules FlexBus Ports In Out Appendix A Troubleshooting Diagnosing Hub Indicators System Diagnostics Power and Cooling Problems Installation Physical Configuration System Integrity Appendix B Pin Assignments RJ 45 Port DB9 Serial Port Pin Description Hub s 9 Pin Serial Port to PC s 9 Pin COM Port Hub s 9 Pin Serial Port to PC s 25 Pin DTE Port Hub s 9 Pin Serial Port to Modem s 25 Pin DCE Port Appendix C Product Specifications Product Specifications Appendix D Regulatory Standards EMI Warning FCC Class A Certification Voluntary Control Council for Interference VCCI 1 EN55022 Declaration of Conformance CE Mark Declaration of Conformance Safety Compliance B 4 B 5 C 1 C 1
64. olating Each Hub Extending the Network with Alternate Connections Linking the Stack to a Management Station Interconnecting the Segments Connecting Remote Stacks Operating in the Novell NetWare IPX Environment Operating in the TCP IP Environment Connecting to the Network Backbone Chapter 4 Configuring the System Making the Connections Required for System Configuration Direct Connection Network Connection Local In Band Telnet Connection Local In Band Network Connection Remote Connection Configuring the Fast EtherHub Site Configuring the Remote Site Remote Configuration Methods Accessing the Configuration Management Program Configuring Your System with the On board Program Using the Fast EtherHub 3500 System Configuration Program System Configuration Program for the Fast EtherHub 12i Configuring the SmartExtender Port 3 2 3 4 3 7 3 10 3 11 3 12 3 13 3 14 3 15 4 1 4 2 4 2 43 4 4 4 4 4 4 4 5 4 5 4 7 4 8 4 9 Contents Fast EtherHub 3500 System User s Guide System Configuration Program for the 12mi and Stack 4 11 Exiting the Configuration Program 4 12 Restarting the Agent 4 13 Displaying System Information 4 14 Configuring the SNMP Agent 4 15 Configuring SNMP Communities 4 16 Configuring IP Trap Managers 4 17 Configuring IPX Trap Managers 4 18 Changing the Segment Configuration 4 19 Configuring Hub Parameters 4 21 Configuring Port Parameters 4 25 Defining Backup Ports 4 29 Port Intrusion Contr
65. orts both of which can be connected to 10BASE T or 100BASE TX media types Transmission speed is automatically set to 10 or 100 Mbps via auto sensing and half or full duplex via auto negotiation e 100BASE T4 EM3551 T4 Provides two RJ 45 ports for 100BASE T4 connection Transmission speed is automatically set to 10 or 100 Mbps Product Overview 1 3 Fast EtherHub 3500 System User s Guide via auto sensing Transmission mode for 1OOBASE T4 is fixed at half duplex e 100BASE FX EM3551 FX SC or EM3551 FX ST Provides two SC or ST type connectors for 1OOBASE FX connection Transmission mode is automatically set to half or full duplex via auto negotiation Transmission speed is fixed at 100 Mbps Power Module Power Module EM3550 PWR Slide in power module for use in the slots on the back of hub When using two modules the load is shared equally between both reducing the chance of failure but still providing backup power in case either module should fail In Band Network Managment Software AccView Open SW6102 This Windows based network management software package analyzes and displays data received from the Fast EtherHub 3500 system This package allows the network supervisor to access information from and set parameters for any hub in stack by transmiting commands to the appropriate management agent AccView should be installed on the network management station designated to manage the Fast EtherHub 3500 stack
66. r of short fragments Runts Number of fragments that were too long to qualify as short events f simultaneous node transmissions detected by this device Late Events Number of frames where a collision occurred late in the transmission Data Rate Mis Number of frames for which the data rate does not match the local frequency Auto Partitions Number of times this porthas been automatically partitioned due to jabber Total Errors Total number of errors including FCS alignment FramesTooLong ShortE vents LateE vents Jabber and DataR ateMismatches detected on this device Number of times the source address has changed Last source address Number of symbol errors i e code group errors including collision artifacts or transmission errors Note that these errors are unique to 100 Mbps analog signals Table 4 21 Port Statistics Menu LSA Changes Last Source Addr Symbol Errors Collisions Number o Configuring the System 4 41 Fast EtherHub 3500 System User s Guide Statistics for SmartExtender Module Statistics for the SmartExtender Module includes the basic Ethernet variables shown below Screen statistics are not SEM Port Statistics automatically refreshed from the agent Select Refresh Statistics Return to Previous Panel to update the displayed values Refresh Statistics The
67. rovides access to the private MIB To gain full SNMP functionality you must use optional network management software e g AccView Open Multiple Agents You may include multiple agents in a stack To provide a fail safe backup management agent include it in the same segment with the Master agent You may also use several active agents in the same stack However they must be attached to different segments and have unique IP addresses SNMP Backup Agent The Fast EtherHub 3500 system supports a backup function for the management agent This special function allows the stack to have two or more SNMP network management agents attached to the same segment wherein one agent is configured as the Master agent and the other s as a Slave i e Backup agent The agent in slave mode behaves as a Fast EtherHub 12i But if the Master agent fails the Slave agent takes over its functions using the latest data mirrored from the Master including its IP address Note that to manage the stack out of band after the Slave has assumed control you must plug your PC or modem into the Serial port of the Slave agent If you are using optional network management software just ensure that your network management station can access the new control agent via its current network connection Note Placing redundant agents in a segment will cause the system to set the agent with longest up time as the Master and the other s asa slave If more than one
68. rwise the agent will not accept it Also be sure that you have already set the required bootup option for the target hub under the Hub Configuration menu File transfer status is indicated by messages at the bottom of the screen Firmware is first loaded into a temporary buffer If you selected download for permanent use it will then be transferred to nonvolatile memory After you finish transfering the firmware the agent will be reset and you will have to log back into the configuration program again The following screen shows an example of the Xmodem Download menu Xmodem Download Return to Previous Panel Download Mode TEMPORARY Process Download Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 21 Xmodem Download Menu Menu items are briefly described in the following table Description You can download to permanent flash ROM or temporary storage in RAM for test purposes only Initiate the file transfer process Table 4 16 Xmodem Download Menu Download Mode Process Download 4 34 Configuring the System Fast EtherHub 3500 System User s Guide Changing User Passwords The on board configuration program includes two fixed user types including Admin and Guest The access privilege is Read Write for administrator and Read Only for guest The default user names are admin and guest without passwords The admi
69. s to guarantee Product Overview Fast EtherHub 3500 System User s Guide flawless performance To ensure that you can manage any kind of network load the extender modules provide adaptive cut through switching based on Accton s smart algorithm This method dynamically changes the way it handles data based on the current error rate This switching strategy start at fragment free for a clean to moderately dirty data environment and changes to store and forward for a highly contentious environment By using this method the SmartExtender Modules deliver the best networking performance under any environment Moreover in addition to using adaptive switching to optimize throughput these modules also support back pressure to eliminate frame loss after their buffers fill by blocking unwanted traffic from being passed onto a segment Product Overview 1 11 Chapter 2 Installing the System This chapter describes how to install the Fast EtherHub unit and establish network connections You may install this hub on any level surface e g a table or shelf or in a standard equipment rack However please take note of the following minimum site requirements before you begin Pre Installation Requirements Before you start actual hardware installation make sure you can provide the right operating environment including power requirements sufficient physical space and proximity to other network devices that are to
70. se modules Installing a SmartExtender Module If you need to install an extender module take the following steps 1 Disconnect power to the hub 2 Remove the face plate on the expansion slot or a previously installed SmartExtender Module by removing the two screws with a Phillips i e cross head screwdriver 3 Before opening the package that contains the extender module touch the bag to the hub casing to discharge any potential static electricity 4 Remove the module from the anti static shielded bag 5 Holding the module level gently push it all the way into the expansion slot ensuring that it firmly engages with the connector 6 If you are sure the module is properly mated with the connector replace the retainer screws to secure the module in the expansion slot 7 Run corresponding media type between the extender module and the target device Connecting Twisted pair Cabling For the 1 OOBASE TX and 100BASE T4 modules prepare Category 5 straight through twisted pair cables with RJ 45 plugs at both ends When connecting the module directly to an end node device e g a workstation or file server a bridge or router run cable from the MDI X port on the SmartExtender Module to the target device However when connecting the module to a hub or switch Installing the System 2 7 Fast EtherHub 3500 System User s Guide connect one end of the cable to the MDI port on the extender module and the other
71. slave exists in a segment the slave higher up in the FlexBus chain will be chosen to function as the Master if it fails Setting Up Network Connections 3 3 Fast EtherHub 3500 System User s Guide Notes Port Backup Function The Fast EtherHub 3500 system supports a port backup function i e a redundant link A hub system can have up to 18 pairs of redundant links These links are configurable using the in band or out of band management program When a primary link fails the secondary i e backup link automatically takes over 1 To prevent traffic from looping the primary port is enabled and the backup port disabled If the system is functioning normally the Link indicator for the primary port and the Partition indicator for the backup port will be on 2 It is common practice to attach these links to the same physical device e g two separate adapter cards on a critical server However to provide more flexibility this is not enforced by the configuration program Security Features Intrusion Protection Any repeater port on the hub can be configured with a preferred source address If an unauthorized intruder is detected the network management station can be notified or a trap can be sent and the port disabled Setting Up Network Connections Fast EtherHub 3500 System User s Guide Sample Network Configurations The Fast EtherHub 3500 series stackable hubs are designed to provide flexibility
72. t on this hub to a crossover port on the switch However if you must connect to a switch via station ports at both ends of the cable use crossover cabling Connecting to a SmartExtender Module The Fast Ethernet 3500 Series includes a network expansion slot on the front panel that supports connection to 1OOBASE TX 10BASE T 100BASE T4 or 100BASE FX Each SmartExtender Module acts as a two port switch that can forward and filter data frames at line speed One port is connected to the hub s internal repeater bus while the other port on the hub s front panel can be used to connect the hub to any compatible network device The optional extender modules include 2 6 Installing the System Fast EtherHub 3500 System User s Guide Retain the face plate for possible future use w The SmartExtender Modules and not hot swappable Be sure the hub is powered off when installing these modules Avoid running your cables near equipment that may generate electromagnetic interference 10BASE T EM3551 TX SmartExtender Module 100BASE TX EM3551 TX SmartExtender Module 100BASE T4 EM3551 T4 SmartExtender Module 100BASE FX EM3551 FX ST SmartExtender Module EM3551 FX SC SmartExtender Module Note The EM3551 TX automatically adjusts to 10 or 100 Mbps using auto sensing Refer to SmartExtender Module in Chapter 1 The SmartExtender Modules are not hot swappable Be sure you power off the hub before installing any of the
73. t uses a standard LAN interface such as a workstation or server or also to a network interconnection device such as a bridge or router depending on the port type implemented 1 Prepare the network devices you wish to network Make sure you have installed suitable 1OOBASE TX network interface cards before making a connection to any of the hub s station ports You also need to prepare straight through 100Q Category 5 shielded or unshielded twisted pair cables with RJ 45 plugs at both ends 2 4 Installing the System Fast EtherHub 3500 System User s Guide Notes 2 Connect one end of the cable to the RJ 45 port of the network interface card and the other end to any available MDI X station port on the hub Just remember that if you use Port 12MDI X the daisy chain port 12MDI cannot be used When inserting an RJ 45 plug be sure the tab on the plug clicks into position to ensure that it is properly seated Using the hub ina stand alone configuration you can network up to 12 nodes Do not plug a phone jack connector into the RJ 45 port This may damage the switch Instead use only twisted pair cables with RJ 45 connectors that conform with FCC standards 1 Make sure each twisted pair cable does not exceed 100 meters 2 We advise using Category 5 cable for all network connections to avoid any confusion or inconvenience in the future when you upgrade attached devices to Fast Ethernet 3 You may also connect a devic
74. tender modules except for 100BASE T4 support both half duplex and full duplex communications However for this hub to correctly set the transmission mode the attached device must also support auto negotiation If auto negotiation fails the transmission mode defaults to half duplex If this setting is not suitable then the transmission mode must be manually configured via on board configuration Chapter 4 or optional network management software e g Acc View Open To reactivate auto negotiation just unplug a connection from the port on the hub and plug it in again Remember that full duplex mode can only be used for a dedicated link such as that provided by the SmartExtender Module When connecting to a shared collision domain i e another hub set the transmission mode for half duplex Quick Installation v Fast EtherHub 3500 System User s Guide Difference in connecting to the The Fast EtherHub 3500 stack can be connected to a larger extended network via the daisy chain port or SmartExtenter Module Network using any device such as a switch bridge or router Depending on your network configuration you may attain better performance by making a direct connection from the daisy chain port or a station port on this hub to an interconnection device Making a connection from an extender module may introduce slightly more delay Check your connections 11 Verify network communications by ensuring that e you
75. ter Transmission speed is automatically set for any connection made to the SmartExtender Module Transmission mode automatically configured for the connected device only if it supports auto negotiation Use half duplex for a shared collision domain 10 If an optional SmartExtender Module is installed in the expansion port it can be used to make a bridged connection from this hub to another network device using 100BASE TX 10BASE T 100BASE T4 or 1OOBASE FX media types When connecting a node to the expansion port the maxi mum cable length is 100 meters for twisted pair cable and 2 kilometers for fiber Refer to Chapter 2 for a more detailed description of calculating the maximum length permitted for fiber optic cable You can use the extender module to bridge this hub to another Ethernet or Fast Ethernet hub or stack or to attach it to a network interconnection device such as a switch bridge or router However when using the expansion port to cascade to other networking devices outside the stack note that the maximum cascade length should be limited to 7 devices For integrating legacy networks the 100BASE TX extender module provides for connection via either 1OOBASE TX or 10BASE T All 100BASE entender modules use auto sensing to set the transmission speed at 10 or 100 Mbps In other words this module can correctly set the transmission speed for the attached device even if it does not support auto negotiation The ex
76. ts on adjacent hubs Run a simple chain starting at the Out port on the top hub in the stack and ending at the In port on the bottom hub in the stack No more than 6 hubs can be connected via the backplane bus Quick Installation iii Fast EtherHub 3500 System User s Guide Attach each hub to one of the backplane segments Use the SmartExtender Module to 7 interconnect different segments in the stack Or interconnect the stack s segments by attaching the daisy chain port to a switch or the station ports to a router Attach to the extended network via the daisy chain port 6 Connect each hub to one of the 3 Fast Ethernet segments embedded in the backplane bus using either on board configuration Chapter 4 or optional network management software e g AccView Open You can leave a hub isolated from the backplane if required for your network environment e g to restrict network access for the attached user group However you should be careful to structure your network connections so that nodes which communicate frequently are located in the same segment Factory default is Segment 1 Bridge the different backplane segments in the Fast Ethernet 3500 stack by running a connection from the optional 100BASE TX extender module on this hub to any station port on another hub in the stack that has been assigned to a different segment Remember that devices connected to the switching port exist in a separate segment
77. ugh this device Number of bytes passing through this device Collisions Number of simultaneous node transmissions detected by this device Alignment Errors Number of mis synchronized data packets detected by this device Total Errors Symbol Errors Num CRC Errors Number of Ethernet Cyclic Redundancy Check errors detected by this device Total number of errors including FCS alignment FramesTooLong ShortE vents LateE vents abber and DataRateMismatches detected on this device bero errors Note that these errors are unique to 100 Mbps analog signals symbol errors i e code group errors including collision artifacts or transmission Table 4 19 Segment Statistics Menu Configuring the System 4 37 Fast EtherHub 3500 System User s Guide Screen statistics are not automatically refreshed from the agent Select Refresh Statistics to update the displayed values The values displayed have been accumulated since the last system reboot or counter reset Hub Statistics Displays statistics for any hub in the stack Select the required hub from the following menu Hub Statistics Hub Selection Menu Return to Previous Panel Hub 1 Statistics Hub 2 Statistics Hub 3 Statistics Hub 4 Statistics Hub 5 Statistics Hub 6 Statistics Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to
78. values displayed have been accumulated since the last Hub ID 1 Position 1 system reboot or counter reset Port ID SEM In Frames 4265954 FCS Errors 52 In Octets 842532471 Frames Too Long 0 In Discarded 744817 Runts 33 Out Frames Collisions 11678 Out Octets 4432038 Out Discarded Return to previous panel Use arrow keys to move lt Enter gt to confirm lt Ctrl T gt to return to Main Menu Figure 4 29 SEM Port Statistics Menu Displayed items are briefly described in the following table AR S Hub ID Hub identifier within the stack Position The physical position in the stack as determined by its position from the top of the FlexBus chain Port ID Portidentifier on the hub In Frames Number of frames received In Octets Number of octets received In Discarded Number of frames received and filtered Out Frames Number of frames transmitted Out Octets Number of octets transmitted Out Discarded Number of frames transmitted and filtered i e at the repeater to SEM interface FCS Errors Number of Frame Control Sequence errors Frames Too Long Number of times frame length has exceeded the maximum allowable size i e 1518 bytes Runts Number of fragments that were too long to qualify as short events Collisions Number of simultaneous node transmissions detected by this device Table 4 22 SEM Port Statistics Menu 4 42 Configuring the System
79. view Fast EtherHub 3500 System User s Guide Networking Flexibility via SmartExtender Modules Easy Installation Firmware update supported for the Fast EtherHub 12mi models via out of band Xmodem file transfer through the serial port or in band TFTP file transfer over the network One slot supports optional slide in network extender modules for connection to IOBASE T 100BASE TX 100BASE T4 or 100BASE FX on a separate segment Transparent bridging between stack and external device via optional network extender modules Uses adaptive cut through switching which dynamically changes between fragment free cut through and store and forward depending on the CRC error rate 100BASE TX SmartExtender module automatically senses transmission speed at 100 Mbps or 10 Mbps 100BASE TX and 100BASE FX SmartExtender modules support two interface modes full duplex or half duplex auto negotiates transmission mode for full duplex and half duplex if same feature is supported by attached device otherwise can be manually configured Automatically learns MAC addresses to build the routing information database Automatically filters local traffic Transparent to all higher level protocols Flexible installation for desktop or rack standard 19 size Plug and play Self diagnostics Automatic polarity detection and correction permits automatic recovery due to wiring errors Automatic ID assignment and auto terminator setting
80. xBus 3500 stack cable Accton s Fast EtherHub 3500 models each contain 12 Fast Ethernet 100BASE TX RJ 45 ports one MDI daisy chain port and one slot for an optional connection using 1OOBASE TX 10BASE T 100BASE T4 or 100BASE FX The smart design built into the front display panel and configure options provide a friendly interface that simplifies installation and network troubleshooting If you are already familiar with basic network operations you should be able to install this hub as described below 1 2 Unpack the Fast EtherHub 3500 unit Find a location close to the network devices you need to connect and within easy reach of an electrical outlet Mount the hub on a desktop or any other flat surface If you are installing multiple hubs you can stack them on top of each other after attaching the foot pads or install them in a standard EIA 19 inch rack Connect any devices that use a standard network interface to the RJ 45 MDI X station ports e g a workstation server or router Use 1000 Category 5 unshielded twisted pair UTP or 1000 shielded twisted pair STP cable Also be sure that the length of any twisted pair connection does not exceed 100 meters Refer to Chapter 2 for a more detailed description of calculating the maximum cable length permitted between two end nodes If you are stacking multiple hubs connect the FlexBus 3500 stack cable between the Out and In backplane por

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