Avaya (BES50) User's Manual
Contents
1. gt 008 i Source Port 06544 gt Address Table r D gt uto Dowco Detection gt our Application Fiering SNTP M Administration a System Information Quick Str a Cable Test N Security amp Users Accounts I OPE Cup OT Others Authentication Gemngs HTTP Senings Port Secuety rd gt 802 1X Vac ACL Configuration a Port Binding r Logout A Reset gt Support Source Port Bit Mask 10629281 Copyrighted 2006 Norte Lime All rights reserved NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 18 Technical Notes QoS Features on BES50 NORTEL ontact Administration gt Security gt ACL Configuration Extended ACL Access RW gt Summary gt Configuration gt Statistics V Applicanons gt Spanning Tree gt aa gt uor gt Priority gt 008 gt Address Table Extended ACL gt Auto Device Detecvon Soup Application Fitering a SNTP V Administration System Information Quick Stor Cable Tost N Security Users Accounts Authentication Semngs a HTTP Settings Port Security gt en GO ap Vac ACL Configuration amp Port Binding A Logout f Resol gt Support Coyrrights 2006 Norte Lime All eights reserved Figure 11 BES50FE Extended ACL Rule Step 2 Define a class map that matches the classification of the ACL This step identifies the matching traffic as a traffic stream All packets within2. gt Auto Device Detection 9 C Enabled 10 Enabled Poacyoot v Application F stering a SNIP 1 C Enabled M Aamieistrason System Information 12 enabled Quick Start 2 Cape Test V Security Users Accounts Authentication Settings HTTP Sefing Port Security gt 8021x V ACL amp ACL Configuration a Port Binding Logout f Reset gt Support Coprrighty 7094 Nortel lnc All rights reserved SUA D internet Figure 15 BES50FE Apply QoS Policy to Ingress Port BES50GE Configuration Step 1 Define the traffic classifier in an extended Access Control List ACL This step describes the classification criteria to identify a subset of incoming traffic for the desired QoS treatment The criteria are based on the five tuples in the IP header NOTE The action associated with the ACL rule MUST be set to Permit NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 24 Technical Notes QoS Features on BES50 2 Lihernet Switch Microsoft Internat Explorer D dt yew Pawos Jods P a O CO WAG Ps hie D 88 1 COIN oso en Lat Applications gt Priority gt ACL Priority Mapping ACL Priority Configure Access RW gt Summary r gt Configuration gt Statistes W Applications gt Spanning Tree gt MAN gt upe W Priority a Datsun Port Prionty Defaut Trunk Priory Trafic Classes Queue Mode Queue Scheduling a IP DSCP Status IP DSCP Priority e Prio
3. V Applications gt Spanning Treo gt MAN gt ub N Priory Default Port Priory Default Trunk Priority Traffic Classes Queue Modo Queue Scheduling IP OGCP Status a IP DSCP Priory Priority to DSCP Mapping ees ow um Mater Status gt geg gt Address Table gt Auto Device Detection gt omP Application Filtenng ante W Administration a Systam Information a Quick Start Cable Test gt Security LAT A Resot gt Support 0 1 2 3 4 5 6 Copyright 2096 Nortmlinc AH rights reserved Figure 2 BES50GE Priority to Traffic Class Mapping These traffic classes are served by a scheduler that can run in either Weighted Round Robin WRR or Strict Priority NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 8 Technical Notes QoS Features on BES50 e Strict Priority queuing operates in a pre emptive fashion Frames in the higher priority queues always take precedence over frames in lower priority queues A low priority queue will not be serviced as long as there is a frame in one of the higher priority queues When the highest priority queue is empty frames from the other queues are serviced based on their precedence i e from the higher priority queue to the lower priority queue With strict priority queuing it is possible that some queues may never be serviced causing frames dropped and starvation Use of Strict Priority queuing must be used with great care e With Weighted Round
4. Default Trunk Priory Action Pema v Source Port pasen a Tame Classes amp Queue Mode Source Address Type Am w Source Port Bit Mask 1046929 Queue Scheduling IP DECP Stols Source IP Address Destination Part 85535 IP DSCP Priority Source Subnet Mask Destination Port Bit Mask 1025226 Prionty lo DEC Mapping amp ACL Prionty Mapping Destination Address Type am M Marker Statue Destination IP Address gt 008 gt Address Table Destination Subnet Mask 1 ees Protocol Orre Cup un O Others lo Application F tering Mou CL CL c N Administration System information Quick Start Cable Tett N Security Users Accounts Authenticabon Setting HTTP Settings Port Bocurtty gt 0021x Y act ACL Configuration Port inding A Logout Copyright 2886 Zeene kee All steht reserved go internet Figure 16 BES50GE Extended ACL Rule Step 2 Bind ACL classification rule to an ingress port This step binds the ACL classification rule to an ingress port Traffic classification is carried out at the ingress port where the incoming IP packets enter the BES50GE switch All packets that match the classification rule are considered as belonging to the same traffic stream A priority index is assigned to the traffic stream which is then mapped into one of the 8 CoS value Since IP DSCP is a 6 bits value there are more than 8 different combinations of valid DSCP value A one to one priority index to CoS mapping limits
5. Figure 14 BES50FE Policy Setting DSCP Value eene nennen nnne 23 Figure 15 BES50FE Apply QoS Policy to Ingress Port ss 24 Figure 16 BES50GE Extended ACL Rule eene tenen nennen sinn ener 26 Figure 17 BES50GE ACL Priority Mappimg sisi 28 Figure 18 BES50GE IP DSCP Re Marking Status eene 29 Figure 19 BES50GE Priority Index to IP DSCP Mapping nennen 30 NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 5 Technical Notes QoS Features on BES50 Overview BES50 provides a number of features to support different Quality of Service QoS for different types of traffic There are multiple levels of traffic prioritization on BES50 both BES50FE and BES50GE Prioritization can be based on 1 Default port priority 2 802 1p value of the incoming tagged Ethernet frame 3 IP DSCP of the incoming IP packet 4 ACL based using the 5 tuples in IP header source and destination IP addresses source and destination ports and protocol number BES50 has pre defined precedence or order when applying these mechanisms ACL based prioritization has the highest precedence over the others and default port priority has the lowest precedence if nothing else has been configured When an incoming Ethernet frame arrives at an ingress port BES50 first determines the traffic priority CoS value between 0 7 based on the L2 L3 information carried in the Ethernet frame and or the IP header IP DSCP IP addresses port numbers and protocol
6. a default priority to traffic class mapping The priority to traffic mapping for BES50FE and BES50GE are depicted in the following table Traffic Class Priority CoS BES50FE BES50GE Table 1 BES50 Priority to Traffic Class Mapping This mapping is also user configurable if the user desired to use a different setting To review and or configure the priority to traffic class mapping navigate to the Applications gt Priority gt Traffic Classes panel NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 7 Technical Notes QoS Features on BES50 NORTEL ontact Applications gt Priority gt Traffic Classes Access RW gt summary Traffic Classes o gt Configuration gt Statistics V Appikatons gt Spanning Tree gt An gt LLOF V Priority Defaus Port Priority Defaut Trunk Prionty Trame Classes Queue Mode Queue Scheduling IP DSCP Status IP OSCP Priority gt 008 gt Address Table gt A n Device Detection gt IOMP Application Filtering a SNTP W Administration System Information Quick Start Cable Test gt Securny A Logout fr Reset gt Support wona una OF Copyrights 208 Nerte Lime All right reserved Figure 1 BES50FE Priority to Traffic Class Mapping NORTEL Contact Applications gt Priority gt Traffic Classes Aceoss RW gt Summary Traffic Classes o gt Contguration Priori ruffic Class gt Stagen
7. default out of the box settings that are captured in the following table Traffic Prioritization Method Default Status Default CoS Priority Value Default port priority Enabled 0 802 1p bit tagged Ethernet Enabled Taken from 802 1p value of the incoming frame tagged Ethernet frames IP DSCP Disabled N A ACL based Disabled N A Table 5 Default QoS Settings of BES50 Without modifying the default settings the followings describe the default QoS behaviour of both BES50FE and BES50GE e f the incoming Ethernet frame is a tagged frame BES50 will take the 802 1p value specified in the VLAN tag as the CoS priority value This CoS value is used to put the incoming frame into one the of traffic classes see Table 1 BES50 Priority to Traffic Class Mapping e If the incoming Ethernet frame is an untagged frame BES50 will use the default port priority value 0 as the CoS priority and maps the frame into one of the traffic classes see Table 1 BES50 Priority to Traffic Class Mapping o For BES50FE CoS value of 0 maps into traffic class 1 For BES50GE CoS value of 0 maps into traffic class 2 o This means that only tagged Ethernet frames with 802 1p value of either 1 or 2 will have lower priority than the untagged Ethernet frames e The IP DSCP value specified in the IP header has no effect on the default QoS behaviour of BES50 switches Incoming traffic is prioritized based on either the 802 1p value of the
8. number Each priority CoS basically 802 1p bit value maps into one of the traffic class 4 classes for BES5OFE and 8 classes for BES50GE These traffic classes are served by a scheduler that can run in either Weighted Round Robin WRR or Strict Priority BES50 also provides the capability to mark or re mark the 802 1p value CoS or the DSCP value of the egress Ethernet frames and or IP packets The following table summarizes these two features Egress re marking Traffic CoS 1p tagged DSCP IP packets Prioritization Ethernet frames BES50GE BES50FE Default port Yes optional No priority 802 1p bit tagged Yes optional No Ethernet frame IP DSCP Yes optional No ACL based Yes optional Yes if the applied policy has an associated action to set IP DSCP value NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 6 Technical Notes QoS Features on BES50 High level Description of QoS Treatment in BES50 A central element for providing different QoS treatment is the concept of traffic priority and traffic classes When an incoming Ethernet frame arrives at an ingress port BES50 first determines the priority CoS value between 0 7 of the incoming frame based on the L2 L3 information carried in the Ethernet frame and or the IP payload Each priority CoS basically 802 1p bit value maps into one of the traffic class 4 classes for BES50FE and 8 classes for BES50GE BES50 provides
9. right reserved Figure 13 BES50FE Policy Setting CoS Value IP DSCP The new DSCP value first maps into a CoS priority value based on a defined DSCP to CoS mapping see Figure 10 BES50 DSCP to COS Mapping The new CoS value is then mapped into one of the traffic class based on the CoS to traffic class mapping see Figure 1 BES50FE Priority to Traffic Class NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 22 NOTE Technical Notes QoS Features on BES50 Using a QoS policy to set the new IP DSCP will modify the DSCP value of the target IP packet as well as the 802 1p value of the egress Ethernet frame that encapsulated the target IP packet NORTEL Access RW gt Surnmary gt Configurason gt Statistics V Applications gt Spanning Tree gt VLAN gt LLDP gt Priority Y 008 V Dan Class Map Policy Map Service Policy Settings gt Address Table gt Auto Device Detection gt tome Application Fatering Users Accounts Authentication Semngs a HTTP Semngs amp Port Security gt 21xX N ACL ACL Configuration a Port Binding Logout Reset gt Support Applications gt QoS gt DiffServ gt Policy Rule Settings Policy Rule Settings Bailey ame Classoo1 A sa mir oser s vied Rate 1 100000 Qu c Copyright 2085 Nortel lnc All rights reserved Access RW gt Surnmory gt Configurason gt Statisties V Applica
10. the egress DSCP marking remarking to only 8 DSCP values BES50 defines 16 priority index and a non configurable Priority Index to CoS mapping which are used in both QoS treatment and IP DSCP marking re marking Unlike BES50FE Ethernet frame and IP packet marking re marking is performed on the egress side of BES50GE when the Ethernet frame is transmitted NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 26 Technical Notes QoS Features on BES50 Priority CoS Value Index NI OD 01 CO TO OI NOIR ON o Table 3 BES50GE Priority Index to CoS Mapping NORTEL Applications gt Priority gt ACL Priority Mapping Access RW gt Summary ACL Priority Configure gt Configuration Port Rame I Prior 15 gt Statistics ne ACLODIJP zi V Applications gt Spanning Tree gt ACL Priority Configure Port Deput Port Prionty Default Trunk Pricey Tre Classes Queue Mode Queue Scheduling a IP DSCP Status a IP DSCP Priority a Priority to DSCP Mapping ACL Priory Mapping Marker Status gt 008 gt Address Table Ato Device Detection gt IMP Applicaton Filtering SNTP ACL Configuration Por Binding dE Logout Copyrights 2006 Nortel Inc All rights reserved NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 27 Technical Notes QoS Features on BES50 Applications Priority ACL Prio
11. the same traffic stream are subject to the same QoS policy NORTEL oniac Applications QoS DiffServ Class Map Add Access RW gt summary Class Configuration CL cs 2 gt Configuration T gt Stanstes ET V Applications match any v gt Spanning Tree a gt MAN gt uor gt Priory W avs N Dien a Class Map om Lu 2 Policy Map Service Policy Settings gt Address Table gt Auto Device Detection gt GMP amp Application Filtering SNTP W Administration System Information a Quick Start Cable Test V Security Users Accounts Aumentication Settings HTTP Somngs ACL Configuration Por Binding A Logout fr Reset gt Support Copyright 2886 Nertel tine All eights revered NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 19 Technical Notes QoS Features on BES50 NORTEL Applications QoS gt DiffServ gt Class Map Match Class Settings gt Summary Match Class Settings ca o gt Configuration R T XT gt Statistics V Applications gt Spanning Tree gt MAN gt uoe gt Priority V 008 V Dinserv a Class Map Policy Mop Senice Policy Settings Reload dose cl gt Auto Device Detection gt up amp Application Fitering Uners Accounts Authentication Setings HTTP Somngs Port Security gt 60214 VAL ACK Configuration Port Binding A Logout E Raset gt Support Copyright 1086 Nortel ine All right
12. 2 1Q VLAN tagged frame the IEEE 802 1p User Priority bits contained in the Ethernet frame will be used for traffic prioritization If the egress port is an untagged member of the associated VLAN the egress frames are stripped of all VLAN tags prior to transmission To review and or modify the default port priority settings navigate to the Applications Priority Default Port Priority panel NORTEL Applications gt Priority gt Default Port Priority Default Port Priority exp MD o PETTEE Egece Trame Cases T Port vvv m 4 4 4 4 4 4 4 4 4 4 4 4 e reme Figure 8 BES50 Default Port Priority Settings 2 802 1p User Priority BES50 can use the IEEE 802 1p user priority embedded in the incoming tagged Ethernet frames to determine the appropriate user traffic priority Up to 8 traffic priorities are defined in IEEE 802 1D BES50 provides a default user priority to traffic class mapping in accordance with Annex G of the IEEE 802 1D keep in mind there are 4 traffic classes for BES50FE and 8 traffic classes for BES50GE This mapping is also user configurable if the user desired to use a different mapping To review and or configure the traffic priority to traffic class mapping navigate to the Applications Priority Traffic Classes panel see Figure 1 BES50FE Priority to Traffic Class and Figure 2 BES50GE NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 14 Technical Notes
13. BES50GE uses the ACL Priority Mapping to map traffic matching the ACL to a specified priority index see Figure 17 BES50GE ACL Priority Mapping 3 Location of frame packet re marking BES50FE classifies and re mark CoS DSCP at the ingress port i e the port in which the Ethernet frame enters BES50FE of the switch In contrast BES50GE classifies traffic at the ingress port but re mark CoS DSCP at the egress port i e the port in which the Ethernet frame is emitted from BES50GE of the Switch 4 IP DSCP re marking Both BES50FE and BES50GE support re marking of the DSCP value of an IP packet However there are subtle differences in terms of how the IP packet is re marked e BES50FE re marks packets on a per traffic stream level i e all traffic that matches the same QoS policy configured on a specific ingress port e BESBOGE re marks packets on a per port basis specifically IP packets that are emitted from an egress port with IP DSCP re marking enabled e BESBOFE only re marks DSCP value of the IP packets that match a QoS Policy with an associated Set IP DSCP action e If re marking is enabled on an egress port BES50GE always re mark the DSCP value of all IP packets emitted from that egress port based on the priority index determined by BES50GE NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 32 Technical Notes QoS Features on BES50 Default QoS Behaviour of BES50FE and BES50GE BES50 provides a set of
14. OO PO o Table 4 BES50GE Priority Index to CoS and IP DSCP Mapping A word of caution when IP DSCP based traffic prioritization is enabled Since the DSCP value is 6 bits and there are only 8 CoS priority value enabling IP DSCP remarking may alter IP DSCP to an undesirable value The following table combines the default DSCP to CoS mapping with Table 4 BES50GE Priority Index to CoS and IP DSCP Mapping Ingress IP DSCP Value CoS Value Priority Index Egress IP DSCP Value 0 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 48 46 56 E g If IP DSCP traffic prioritization is enabled and the incoming IP packet with DSCP value of 36 does not match any one of the ACL rules BES50GE will map the traffic to the traffic class 4 with a corresponding priority index value 4 When IP DSCP re marking is enabled at the egress port BES50 will map the priority index value 4 to IP DSCP value 18 and re mark the outgoing IP packet with this value NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 31 Technical Notes QoS Features on BES50 Difference Between BES50FE and BES50GE 1 Number of traffic class BES50FE has four traffic classes while BES50GE has eight traffic classes 2 Different ways to configure ACL Based traffic prioritization BES50FE uses the QoS Policy to facilitate ACL based traffic prioritization see Figure 15 BESBOFE Apply QoS Policy to Ingress Port while
15. QoS Features on BES50 3 Traffic prioritization based on IP DSCP This section focuses on prioritizing traffic based on the IP DSCP value in the incoming IP packets In brief the user first needs to enable IP DSCP prioritization it is disabled by default When an incoming IP packet arrives at an ingress port BES50 first maps the DSCP value in the incoming IP packet to a traffic priority CoS value between 0 7 Each traffic priority CoS is mapped to one of the traffic classes each traffic class will be serviced by the scheduler Keep in mind that the IP DSCP field of an IP packet is 6 bits while the 802 1p field of an Ethernet frame is only 3 bits there are a lot more IP DSCP value combination than the 802 1p value BES50 provides a default DSCP to CoS mapping as depicted in the following table The DSCP to CoS mapping is also user configurable if the user desired to use a different setting IP DSCP Value CoS Value 0 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Table 2 BES50 IP DSCP to CoS Mapping E g e DSCP value of 40 or 0x28 maps into CoS 5 and then maps into traffic class 2 in BES50FE or traffic class 5 in BESBOGE e DSCP value of 46 or 0x2e maps into CoS 7 and then maps into traffic class 3 in BES50FE or traffic class 7 in BES50GE NOTE When IP DSCP prioritization is enabled in the event that that the incoming Ethernet frame is also tagged with an 802 1p value BES50 will use the D
16. Robin queuing each queue is assigned a weight which represents a relative proportion of time during which the queue can send packets This technique ensures each queue gets appropriate share of bandwidth for transmitting its packets With Weighted Round Robin no priority is assigned to the queues Each queue sends frames in proportion to its configured weight BES50 uses WRR queuing by default If the user decided to change the scheduling algorithm navigate to the Applications gt Priority gt Queue Mode panel Applications Priority gt Queue Mode gt Summary Queue Mode C C gt Configuration Queue Mode WRR v gt Statistics V Appikatons gt Spanning Tree gt MAN 0 Dofus Port Priority Defaut Trunk Priority 9 Trame Classes a IP DSCP Status IP OSCP Priority Pnorityto DSCP Mapping amp ACL Priority Mapping Marker Status gt 008 gt Address Table gt A n Device Detection gt 10MP Applicaton Filtering NTP N Administration System Informadon a Quick Start Cable Test gt Security A Logout r Roset gt Support eprright 2004 NerteLine All right reserved gom internet Figure 3 Scheduler Queuing Mode When running in WRR the weight assigned to each class are pre defined and not user configurable To view the assigned weight for each class navigate to the Applications gt Priority gt Queue Scheduling panel NN70000 004 issue 1 00 Copyright 2009 Nortel Ne
17. SCP value in the IP packet for traffic prioritization instead of the 802 1p value in the Ethernet frame Step 1 Enable IP DSCP Prioritization BES50 has the capability to prioritize traffic based on DSCP of the incoming IP packet By default this feature is disabled the user has to enable it if desired Each DSCP is mapped into a CoS priority which in turns in mapped into one of the traffic class Navigate to the Applications gt Priority gt IP DSCP Status panel NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 15 Technical Notes QoS Features on BES50 2 Lihernet Switch Microsoft Internet Explorer De DR Wew Favorites Tools mp r Ou D DAO Pur dom O 2S BU Agresi L I nto t so 162 1 1287 NORTEL Contact Applications gt Priority gt DSCP Priority Status gt Summary DSCP Priority Status ZT onfigura amp ion Stan Enabled gt Statistics eee 5 W Applications gt Spanning Tree gt VAN Access RW Default Port Ponty Defwull Trunk Priority Traffic Classes Queue Mode Queue Scheduling IP DSCP Status IP DSCP Priority a Priontyto DSCP Mapping ACL Priory Mapping Marker Status gt 008 gt Address Table gt Auto Device D tection IGMP Application Fitering e SNIP Copyright 2006 Nortel lae All rights reserved Figure 9 BES50 IP DSCP Priority Status Step 2 Configure Check DSCP to CoS mapping BES50 has a predefined DSCP to CoS mapping H
18. Technical Notes QoS Features on the Business Ethernet Switch 50 BES50 Version NN70000 004 issue 1 00 Date February 3 2009 Status Released Copyright 2009 Nortel Networks All rights reserved The information in this document is subject to change without notice The statements configurations technical data and recommendations in this document are believed to be accurate and reliable but are presented without express or implied warranty Users must take full responsibility for their applications of any products specified in this document The information in this document is the property of Nortel Networks Technical Notes QoS Features on BES50 Revision History Revision Issue Date Document Change Description Ver Iss 1 00 2009 02 03 Released First released version NN70000 004 issue 1 00 Copyright 2009 Nortel Networks Technical Notes QoS Features on BES50 About this Document This application note describes the Quality Of Service QoS capability of BES50 family of switches This document also outlines the procedure to properly configure different QoS features of BES50 The document is intended for people responsible for deployment and support of the Nortel Business Ethernet Switch 50 This may include Customer System Engineering Channel Partner Engineering Nortel Solutions Engineering Knowledge Systems Education Services NN70000 004 issue 1 00 C
19. ic prioritization method see 3 Traffic prioritization based on IP DSCP on page 15 on BES50 since BCM does not tag outgoing Ethernet frames It is also recommended not to enable IP DSCP re marking on BES50 so all QoS capable devices within the customer premise network will apply the same DiffServ QoS behaviour to the IP packets passing through the network Typically DSCP is re marked if necessary when IP packets traverse across DiffServ boundary BES50 is a layer 2 device re marking DSCP is better off performed by a layer 3 router or gateway locating at the edge of two DiffServ boundary NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 34 Technical Notes QoS Features on BES50 Software Baseline This application note draws upon the capabilities available from the following BES50 software releases e BESB5OFE v1 0 3 0 Release 1 1 e BES50GE v1 0 5 0 Release 1 1 NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 35
20. igure 6 BES50FE Traffic Prioritization Flow Chart NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 12 Technical Notes QoS Features on BES50 Match ACL Mapping IP DSCP Is it an IP Enabled packet Tagged Ethernet Frame Figure 7 BES50GE Traffic Prioritization Flow Chart The resulting priority CoS basically 802 1p bit value maps into one of the traffic class 4 classes for BESBOFE and 8 classes for BES50GE These traffic classes are served by a scheduler that can run in either Weighted Round Robin WRR or Strict Priority To review and or configure the traffic priority to traffic class mapping navigate to the Applications gt Priority gt Traffic Classes panel see Figure 1 BES50FE Traffic Classes and Figure 2 BES50GE Traffic Classes NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 13 Technical Notes QoS Features on BES50 Configure BES50 Traffic Prioritization 1 Default Port Priority A default port priority can be specified for each port on the BES50 All untagged packets entering the BES50 are tagged with the specified default port priority and then sorted into the appropriate priority queue at the output port The default priority applies for an untagged frame received on a port set to accept all frame types i e can receive both untagged and tagged frames The default port priority does not apply to IEEE 802 1Q VLAN tagged frames If the incoming frame is an IEEE 80
21. ion if this feature is enabled IP DSCP priority is disabled by default If the ingress Ethernet frame encapsulates an IP packet BES50 uses the DSCP value contained in the IP header to determine the CoS value for the ingress traffic If IP DSCP based prioritization is disabled or the ingress Ethernet frame does not encapsulate an IP packet BES50 extracts the 802 1p value from the tagged ingress Ethernet frame to determine the appropriate CoS If the ingress Ethernet frame is untagged BES50 eventually use the user configurable default port priority to determine the CoS for the incoming traffic Even though both BES50FE and BES50GE follow similar framework to prioritize incoming traffic there are minor difference in the way these mechanisms are implemented BES50FE maps traffic directly into a CoS priority value which in turns identifies the traffic class which will be used for the frame or packet BES50GE first maps traffic into a priority index which in turns maps into a CoS priority value to identify the traffic class which will be used for the frame or packet The following two figures illustrate the flow chart of how traffic prioritization is achieved in both BES50FE and BES50GE NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 11 Technical Notes QoS Features on BES50 Match QoS s Action is Policy Set DSCP No action is Set CoS IP DSCP Is it an IP Enabled packet Tagged Ethernet Frame F
22. ions gt Priority gt Priority to DSCP Mapping Priority to DSCP Mapping C GC o IP DECP Status a IP DSCP Priority a Prionty to O8CP Mapping ACL Priority Mapping 5 Marker Status eco c Figure 19 BES50GE Priority Index to IP DSCP Mapping When IP DSCP re marking is enabled BES50GE always re mark the DSCP value of all IP packets emitted from that egress port based on the priority index determined by BES50GE The re marking process is summarized as follows If the egress port is not configured to re mark IP DSCP or the outgoing Ethernet frame does not encapsulate an IP packet then BES50GE will skip the IP DSCP re marking process If the egress port is configured to re mark IP DSCP and the outgoing Ethernet frame encapsulates an IP packet BES50GE will use the resulting priority index associated with the Ethernet frame to determine the corresponding DSCP value The outgoing IP packet will be re mark with this new DSCP value The following table combines the default Priority Index to CoS mapping and the default Priority Index to IP DSCP to illustrate the respective values used in CoS re marking and IP DSCP re marking mapped from the same priority index NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 30 Technical Notes QoS Features on BES50 Priority CoS Value IP DSCP Index 0 1 2 3 4 5 6 7 8 9 NIIA B OO DO N OM 01 S
23. ly re mark IP DSCP of the outgoing IP packet if the matched QoS Policy has an associated Set IP DSCP action see Figure 14 BES50FE Policy Setting DSCP Value IP DSCP Re Marking on BES50GE Figure 7 BES50GE Traffic Prioritization Flow Chart depicts the flow chart of how the priority index and CoS priority are determined by BES50GE Just like BES50FE BES50GE always re marks the 802 1p value of the tagged egress Ethernet frame with the determined CoS priority value Re marking IP DSCP in BES50GE is slightly different from BES50FE By default IP DSCP re marking is disabled on all the ports The user must manually enable IP DSCP re marking on the egress port i e the port in which IP packet is emitted out from BES50GE if they desired to do so To enable disable IP DSCP re marking on an egress port navigate to the Applications Priority Marker Status panel NORTEL Applications gt Priority gt Marker Status Marker Status CL C o ES cos E dore e ronet Figure 18 BES50GE IP DSCP Re Marking Status NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 29 Technical Notes QoS Features on BES50 BES50GE provides a default priority index to IP DSCP mapping and this mapping is also user configurable if they desired to use a different setting To review and or configure the traffic index to IP DSCP mapping navigate to the Applications gt Priority gt Priority to DSCP panel NORTEL Applicat
24. opyright 2009 Nortel Networks 3 Technical Notes QoS Features on BES50 Table of Contents Revision History e 2 About this Document 3 Table Of Gontents mec 4 Table gel e UC c A Kan akan 5 OV TV OW eM EE PPAR 6 High level Description of QoS Treatment in BES50 rrnnvvnnnnvnnnnnvnnnnnnnnnvvnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnennn 7 Configure BES50 Traffic Prioritization rrssrnnnnnrnnnvvnnnnvnnnnnvnnnnnennnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnr 14 1 Default Port PON s is Ber Leti a e Be rea Gitter ie i lie ceed Pane 14 2 802 1p User Priority siet e eter ee e ate tete ed en edite ttes e veto Eng AA TA vette bete ah 14 3 Traffic prioritization based on IP DCH 15 4 ACL Based Traffic prioritization ss 17 BES50 Re Marking Capability erannvnnnnvnnnnvnnnnnvnnnnnnnnnvnnnnnvnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnenn 29 IP DSGP Re Markingion BESbOFE steiere t ed ian eee tian t 29 IP DSCP Re Marking on BES5OGE aana ia ang Aa AN a agin entente inneren da SENG inneren 29 Difference Between BES50FE and BES50GE nnnsvnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnenr 32 1 Number of traffic class eio ere rere e bete ditata ur di EN Ra ELA a Do aa dn 32 2 Different ways to config
25. owever the users can still modify the mapping if they desired Navigate to the Applications gt Priority gt IP DSCP Priority panel NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 16 Technical Notes QoS Features on BES50 1 Applications gt Priority gt IP DSCP Priority Access RW gt Summary IP DSCP Priority CL X gt Configuration IDSCP 40 CoS 5 gt Stanskcs DSCP 41 CoS 0 V oplicabons OSCP 42 CoS 5 gt Spanning Tree DSCP Priority Table DSC C gt MAN DSCP 44 C980 gt uor OSCP 45 Cog 0 V Priory DSCP 46 CoS 7 M Default Port Priory Class of Service Value 0 7 Default Trunk Priority Trae Classes Restore Defaut Queue Mode Queue Scheduling Cc c IPDSCP Status IP DGCP Priorty Priority 3o OSCP Mapping ACL Priority Mapping a Marker Status gt 005 gt Address Table gt Auto Device Detection gt omP Appite ation Filtering SNTP W Administration System information a Quick Start a Cable Test gt Security A Logo Reset gt Support apyrighty 2006 NerteLinc All rights reserved Figure 10 BES50 DSCP to COS Mapping 4 ACL Based Traffic prioritization Using the ACL classification rules BES50 can also prioritize traffic based on the following IP header information of the incoming IP packets Source IP address Destination IP address Source port number Destination port number Protocol ID Even though both BES50FE and BES50GE suppo
26. rity Mapping Access RW gt Summary ACL Priority Configure mun Port e Type Priority 0 45 gt Configurason gt Statistics V Applications gt Spanneng Tree gt VAN ACL Priority Cot gt LLDP Port V Priority Default Port Priority Dofaun Trank Priority gt Trafic Classes CL Queue Mode Queue Scheduling a IP DSCP Status amp IP DECP Priority Priority to DSCP Mapping ACL Four Mapping Marker Status gt 208 gt Address Table gt Auto Device Detection gt 164P Application Fitering a SNTP W Administration amp System Information a Quick Start Cable Test N Secunty a Users Accounts amp ACL Configuration Port Binding r Logout Copyright 1084 Noriel lnc All rights reserved Figure 17 BES50GE ACL Priority Mapping NN70000 004 issue 1 00 Copyright 2009 Nortel Networks Technical Notes QoS Features on BES50 BES50 Re Marking Capability In addition to traffic prioritization BES50 also provides the capability to re mark the IP DSCP value of an outgoing IP packet and the 802 1p value CoS of an outgoing Ethernet frame IP DSCP Re Marking on BES50FE Figure 6 BES50FE Traffic Prioritization Flow Chart depicts the flow chart of how CoS priority is determined by BESBOFE Re marking in BES50FE is a simple extension to this process BES50FE always re marks the 802 1p value of the tagged egress Ethernet frame with the determined CoS priority value On the other hand BES50FE will on
27. rity to DSCP Mapping amp ACL Prionty Mapping Marker Status gt 008 gt Address Table gt Auto Dewice Detection gt lou Application f ring SNIP M Aaministraton System information Quick Start Cable Test N Securite Users Accounts Authentication Gemngs HTTP Settings a Port Security gt 802 1X VAL ACL Configuration a PortBinding A Logout Copyrighti 2084 Nortel lnc All rights reserved NORTEL Contact Administration gt Security gt ACL Configuration Extended ACL Access RW gt Summary Extended ACL gt Configuration gt Statistics N pplicabons gt Spanning Tree gt aan gt LLDP gt Priority gt 008 gt Address Table gt Auto Device Detection gt Mr Application Filtering a SNTP V Administration d System Information Quick Diet Cable Test V Security Users Accounts Authentication Semngs HTTP Setings a Port Secure Seu vocc ACL Configuration Por Binding r Logout A Rosel gt Support Copyright 2006 Norte Lime All eight reverved NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 25 Technical Notes QoS Features on BES50 Contact Administration gt Security gt ACL Configuration Extended ACL Access RW gt Summary Extended ACL gt Configurao gt Statistics V Applications gt Spanning Tree gt VAN gt uoe V Pronty Default Port Priority Add ACE
28. rt traffic prioritization based on these five tuples in the IP header the configuration process on these two units are different from each other BES50FE Configuration Step 1 Define the traffic classifier in an extended Access Control List ACL This step describes the classification criteria to identify a subset of incoming traffic for the desired QoS treatment The criteria are based on the five tuples in the IP header NOTE The action associated with the ACL rule MUST be set to Permit NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 17 Technical Notes QoS Features on BES50 NORTEL ontact Administration gt Security gt ACL Configuration Access RW gt Summary ACL Configuration Submit Reload gt Configuration rm E Se e Stasis Applications gt Spanning Tree Add ACL gt MAN gt uor gt Priory gt oos gt Address Table gt Auto Device Detection gt omP Application Filtering SNTP W Administration a System Information Quick H rt a Cable Test W Security Users Accounts Nutnibcation Setings a HTTP Settings a Port Security gt 002 1 V ACL AGL Configuration a Port Binding f Logout A Reset gt Support Copyright 2096 Nortellnc All rights sererved Administration gt Security gt ACL Configuration Extended ACL Access RW gt Summary gt Configuration gt Statistics V pplicabons gt Spanning Tree gt VAN gt uor gt Priority
29. s reserved glo ten NORTEL Applications gt QoS DiffServ gt Class Map Match Class Settings gt Summar Match Class Settings o Class Ni T Classi Class Map Policy Map Service Policy Settings ca Ww gt Address Tabia Copyright 2085 Nortel Ine All rights reserved Figure 12 BES50FE Class Map NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 20 Technical Notes QoS Features on BES50 Step 3 Define a QoS policy for the selected traffic stream A QoS policy determines the course of action applying to incoming IP packets that belong to the same traffic stream The action can be mark re mark IP DSCP or mark re mark the CoS priority of the incoming Ethernet frames BES50FE will provide QoS treatment based on the new IP DSCP or CoS value e CoS The new CoS value maps into one of the traffic class based on the CoS to traffic class mapping see Figure 1 BES50FE Priority to Traffic Class NOTE Using a QoS policy to set the new CoS value will not modify the DSCP of the affected IP packet Only the 802 1p value of the egress Ethernet frame that encapsulated the affected IP packet will be modified NORTEL Applications gt QoS gt DiffServ gt Policy Map Add gt Summary Policy Configuration uw a o Configuration gt Suis Policy Name Policy001 V Applications gt Spanning Ti script gt MAN L4 gt uoe gt Priority V 008 CL 3 V Dien Senice Policy Set
30. t Auto Device Detection gt romp a Appieaton Filtenng SNTP QPot vi W Administration System Information Quick Start Cable Test gt Security fr Logo A Rosut gt Support Capyrightiy 2096 Nortellnc All rights reserved O Tw v rene Figure 5 BES50GE WRR Weight Settings NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 10 Technical Notes QoS Features on BES50 BES50 provides multiple ways to classify different types of traffic and map the traffic to one of the 8 defined priority CoS values There are four different methods to classify and prioritize incoming traffic these methods are based on ON Traffic Default port priority 802 1p value of the incoming tagged Ethernet frame IP DSCP of the incoming IP packet ACL based using the 5 tuples in IP header source and destination IP addresses source and destination ports and protocol number priority is determined by applying these mechanisms in a pre defined precedence ACL based prioritization has the highest precedence over the others and default port priority has the lowest precedence If ACL based prioritization is enabled and the ingress traffic matches one of the defined ACL rules the CoS value is determined by the action associated with the configured ACL If ACL based prioritization is disabled or the ingress traffic does not match any of the ACL rules then the ingress traffic is subjected to IP DSCP based prioritizat
31. tagged Ethernet frames or the default priority value of 0 for all the untagged Ethernet frames e Since both BES50GE and BES50FE do not alter the CoS value there is no 802 1p re marking of any Ethernet frames switched through BES50 e By default IP DSCP re marking is disabled on both BES50FE and BES50GE Default QoS Behaviour on BCM Traffic Since both BCM50 and BCM450 do not have VLAN capability all the Ethernet frames transmitted from the BCM must be untagged Ethernet frames When a BCM either BCM50 or BCM450 is connected to a BES either BES50FE or BES50GE with default QoS settings all the traffic transmitted from BCM will map to the same traffic class Effectively there is no service differentiation among the traffic transmitted from the BCM In the presence of Ethernet traffic from other L2 devices only tagged Ethernet frames with 802 1p value of either 1 or 2 will have lower priority than the traffic transmitted from BCM Default QoS treatment on the Ethernet frame sent to BCM is solely depending on whether the frame is tagged when it arrives at the ingress port of the BES50 The BES50 behaviour is captured in the section titled Default QoS Behaviour of BESSOFE and BES50GE NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 33 Technical Notes QoS Features on BES50 When BES50 is used in a customer premises network with BCM50 BCM450 and QoS treatment is required it is recommended to use the IP DSCP traff
32. tings gt Address Table gt Auto Device Detection gt awe Application Fitering Authenticabon Setings HTTP Semngs Copyrighti 2086 Nortel Ine All rights revered cor internet NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 21 NORTEL Access RW gt Summary gt Configuraton gt Statistics V Applications gt Spanning Tree gt MAN gt upe Policy Map gt Address Table gt Auto Device Detection tome amp Application Fitering a SNIP Port Securty gt 8021X VAL ACL Configuration Port Binding A Logout Sonico Pobcy Settings Technical Notes QoS Features on BES50 Applications gt QoS gt DiffServ gt Policy Rule Settings Classt0 vw Rate 1 100000 Burst 64 1522 C c Copyrights 2084 sens Lime All righ r reserved 4B Store Access RW gt Summary gt Configuration gt Statistics V Applications gt Spanning Tree gt MAN gt up gt Priority V 008 N DiffServ a Class Map amp Policy Map gt Address Table gt Auto Device Detection tome Application Fitering i gt Support Service Policy Settings Applications QoS gt DiffServ gt Policy Rule Settings Policy Rule Settings cy N D Meter Class Name Action Rate kbps Burstibyte Exceed Action Set CoS 7 Namo Class ciassoot A s w ceon sl Pate 1 100000 Burst 64 1522 is he Copyrights 2084 Nortel lnc All
33. tions gt Spanning Tree gt MAN gt Lube gt Priority Y 008 V Dinsorv Class Map Policy Map Senice Policy Settings gt Address Tabla gt Auto Device Detection gt loup Application Fitering a Users Accounts Authentication Settings a HTTP Semngs Port Security gt 6021 N act amp ACL Configuration a Port Binding Logout 4 Reset gt Support NN70000 004 issue 1 00 Applications gt QoS gt DiffServ gt Policy Rule Settings Policy Rule Settings lt 2 Policy Name Set IP DSCP 44 ciass00 5 sien w Rate 1 100000 Burst 54 1522 e Qu ad Coprrighty 20 Nortel lnc All rights reserved Figure 14 BES50FE Policy Setting DSCP Value Copyright 2009 Nortel Networks 23 Technical Notes QoS Features on BES50 Step 4 Apply the QoS policy to an ingress port This step applies the QoS policy to an ingress port Traffic classification and marking re marking are carried out at the ingress port where the incoming IP packets enter the BES50FE switch Contact Applications gt QoS DiffServ gt Service Policy Settings Access RW gt Summar Service Policy Settings cap CD gt gt Configurason gt Statistics Enabled V Applications 1 g gt Spanning Tree 2 ClEnsbied cen Enabled gt LLDP gt Priority 4 CJEnsbled Y 008 5 Enabled Y Omsen Class Map 6 Densbiod a Policy Map 7 ClEnsbied Senice Policy Settings H gt Address Table 8 DEnabled
34. tworks 9 Technical Notes QoS Features on BES50 NORTEL Contact Applications gt Priority gt Queue Scheduling Access RW gt Summary Queue Scheduling gt Contguration gt Stabstes i N Applications ouer gt Spanning Tree gt VLAN gt upr M Priory Default Port Priory Default Trunk Priority Traffic Classes Queue Modo Queue Scheduling IPOBCP Status a IP DSCP Priory gt dos gt Address Table gt Auto Device Detection gt our Appseabon Filtenng a SNTP VW Administration System Information Quick Start Cable Test Oper v Traffic Clase 2 weight Teame Class O weight Traffic Claes 1 weight 2 Traffic Class 3 weight gt Socunty A Logout A Reset gt support Cayyright 2006 NerteLinc AU rights reserved a O Tuk D internet Figure 4 BES50FE WRR Weight Settings NORTEL ontact Applications gt Priority gt Queue Scheduling gt Summary Queue Scheduling gt Contiguration Hane W Anplicanons Query gt Spanning Tree gt uw Trape Clans O weight gt Lor Trafic Class 1 weight 2 W Priory WAR Soning Table Trafic Cass 2 weight 4 Detautt Port Prony Trafic Class 3 weight 6 Default Trunk Priority Trafic Class 4 weipht vw amp Trafe Classes Queue Mode Queue Scheduling IPOSCP Status IPOSCP Priorty Priority to DSCP Mapping ACL Priority Mapping a Marker Status gt 008 gt Address Table g
35. ure ACL Based traffic prioritization ses asas aee ae eaaa anana anana aaa 32 3 Location of frame packet re marking ss 32 4 IPD SCP Feta rine sn ott eck sect Stee otii toe e ttem en 32 Default QoS Behaviour of BES50FE and BESSOGE rrnnnvnnnnnnnnnnvnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnennr 33 Default QoS Behaviour on BCM Traffic 33 Ln ruE Ltll zc m 35 NN70000 004 issue 1 00 Copyright 2009 Nortel Networks 4 Technical Notes QoS Features on BES50 Table of Figures Figure 1 BES50FE Priority to Traffic Class Mapping aaa sa aaa aaa aaa aana anana aana anana anana anana nenen naa aane 8 Figure 2 BES50GE Priority to Traffic Class Mapping sasa aaaa aana aana aana a anana anan anana anana nennen 8 Figure 3 Scheduler QUEUING Mode sise 9 Figure 4 BESSOFE WRR Weight Settings iii 10 Figure 5 BES50GE WRR Weight Settings ir 10 Figure 6 BES50FE Traffic Prioritization Flow Chart 12 Figure 7 BES50GE Traffic Prioritization Flow Chart 13 Figure 8 BES50 Default Port Priority Settings 14 Figure 9 BES50 IP DSCP Priority Status sisi 16 Figure 10 BES50 DSCP to COS Mapping nennen nennen tenen reser sinn enne 17 Figure 11 BES50FE Extended ACL Pule nennen nennen rennen sinn enn nes 19 Figure 12 BESbOFE Glass Map eiii iicet teet era Po deti dde Pe donet er Pe gabbana esos 20 Figure 13 BES50FE Policy Setting CoS Value nennen nnne 22
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