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Avaya 8600 Engineering

Avaya 8600 Engineering

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Download this manual See also: Configuration Manual, Maintenance Manual
Ethernet Routing Switch
8600, 8300, 5x00, 4500, 2500
Engineering
RSTP/MSTP Technical Configuration
Guide
Avaya Data Solutions
Document Date: July 2010
Document Number: NN48500-583
Document Version: 2.1

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Summary of Contents for Avaya 8600

  • Page 1 Ethernet Routing Switch 8600, 8300, 5x00, 4500, 2500 Engineering RSTP/MSTP Technical Configuration Guide Avaya Data Solutions Document Date: July 2010 Document Number: NN48500-583 Document Version: 2.1...
  • Page 2 Avaya Support Web site: http://www.avaya.com/support Please note that if you acquired the product from an authorized reseller, the warranty is provided to you by said reseller and not by Avaya. Licenses THE SOFTWARE LICENSE TERMS AVAILABLE ON THE AVAYA WEBSITE, HTTP://SUPPORT.AVAYA.COM/LICENSEINFO/...
  • Page 3 Abstract This document provides an overview of Rapid Spanning Tree Protocol (RSTP) and Multiple Spanning Tree Protocol (MSTP). Revision Control Date Version Revised by Remarks 06/02/2009 Modifications to Software Baseline section RSTP/MSTP Technical Configuration Guide July 2010...

  • Page 4: Table Of Contents

    Reference Documentation ........................ 61 Customer service ..........................62 Getting technical documentation ....................62 Getting product training ....................... 62 Getting help from a distributor or reseller ..................62 Getting technical support from the Avaya Web site ..............62 RSTP/MSTP Technical Configuration Guide July 2010...

  • Page 5: Figures

    Figures Figure 1 Negotiation Process ........................13 Figure 2: Cisco R-PVST Interoperability with Avaya .................. 15 Figure 3: RSTP Configuration Example ...................... 17 Figure 4: RSTP Example – Normal Data Flow ................... 17 Figure 5: MSTP Example with One Region ....................26 Figure 6: MSTP Example with One Region –...

  • Page 6: Document Updates

    Italic text in a Courier New font indicates text the user must enter or select in a menu item, button or command: ERS5520-48T# show running-config Output examples from Avaya devices are displayed in a Lucinda Console font: ERS5520-48T# show running-config ! Embedded ASCII Configuration Generator Script ! Model = Ethernet Routing Switch 5520-24T-PWR ! Software version = v5.0.0.011...

  • Page 7: Overview: Rstp/Mstp

    1. Overview: RSTP/MSTP The original IEEE 802.1D Spanning Tree Protocol (hereby referred to as STP) standard (802.1D-1998 clause 8) provides loop protection and recovery, but, it is slow to respond to a topology change in the network (for example, a dysfunctional link in a network).

  • Page 8: Interoperability With Legacy Stp

    Backward compatibility with other switches that are running legacy 802.1D STP or Avaya MSTG (STP group 1 only). The user can configure an Avaya switch to run Avaya STP, RSTP (802.1w), or MSTP (802.1s) configuration. 1.1 Interoperability with Legacy STP RSTP provides a new parameter ForceVersion for backward compatibility with legacy STP.

  • Page 9: Differences In Port Roles

    1.2 Differences in Port Roles RSTP is an enhanced version of STP. These two protocols have almost the same set of parameters. Table 1 lists the differences in port roles for STP and RSTP. STP supports 2 port roles while RSTP supports four port roles.

  • Page 10: Path Cost Values

    1.4 Path Cost Values RSTP and MSTP recommend new path cost values that support a wide range of link speeds. Table 2 lists the recommended path cost values. Table 2 Recommended Path Cost Values Link speed Recommended value Less than or equal 100Kb/s...
  • Page 11 Designated Forwarding Port All bridges connected on a given segment listen to each other’s BPDUs and agree on the bridge sending the best BPDU as the designated bridge for the segment. The corresponding port on the bridge is referred to as a Designated Forwarding (DF) Port.

  • Page 12: Rapid Convergence

    1.7 Rapid Convergence In RSTP and MSTP, the designated port can ask its peer for permission for going to the Forwarding State. If the peer agrees, then the designated port moves to the Forwarding State without any delay. This procedure is called the Negotiation Process.

  • Page 13: Mstp Mst Region Configuration

    (MCID). The MCID contains the following components:  The MCID Format Selector version: A single byte of value 0 in the current MSTP specification; on the Avaya ERS products this value is exposed and configurable however it should be left at default value 0. ...

  • Page 14: Spanning Tree Interoperability Between Avaya And Cisco

    Cisco core take care of any loops. This is illustrated in Figure 2. The proprietary BPDUs generated by the Cisco Core will simply be re-flooded in the vlan by the Avaya edge switch and thus one of the Cisco’s will block one of the uplinks. Note that in this design only non-native VLANs must be tagged on the uplinks to the Avaya switches.

  • Page 15: Rstp/Mstp Definitions

    Figure 2: Cisco R-PVST Interoperability with Avaya 1.11 RSTP/MSTP Definitions As per the IEEE 802.1s (MSTP) [integrated in IEEE 802.1Q-2005] and IEEE 802.1w (RSTP) [integrated in IEEE 802.1D-2004] standards: Boundary Port: A Bridge Port attaching an MST Bridge to a LAN that is not in the same region.
  • Page 16 NOTE - It follows from this definition that the MCID is the same for all LANs and Ports in the Region and that the set of MST Bridges in the region are interconnected by the LANs. Multiple Spanning Tree Bridge Protocol Data Unit (MST BPDU): The MST BPDU specified.

  • Page 17: Rstp Configuration Example

    Layer 2 network  As an option, we can set the RSTP port priority on 8600-1 to influence the link taken between 8600-1 and 8600-2. The default port priority simply has to be changed to a lower value on 8600-1 from the default setting of 128 ...

  • Page 18: Configuration

    2.1 Configuration For this configuration example, 8600-1 will be configured using ACLI while 8600-2 will be configured using PPCLI. 2.1.1 Set Spanning Tree Mode to RSTP ERS8600-1: Step 1 – Set the bootconfig Spanning Tree mode to RSTP ERS-8610:5(config)# boot config flags spanning-tree-mode rstp ERS-8610:5(config)# save bootconfig ERS-8610:5(config)# boot –y...
  • Page 19 ERS8600-1: Step 1 – Create VLANs 200 and 1000 and add port members ERS8600-1:5(config)# vlan create 200 name mgmt type port-mstprstp 0 ERS8600-1:5(config)# vlan create 1000 type port-mstprstp 0 ERS8600-1:5(config)# vlan ports 4/23,4/24,1/33,1/35 tagging tagAll ERS8600-1:5(config)# vlan members remove 1 1/5,4/23,4/24,1/33,1/35...
  • Page 20 VLAN. 2.1.2 RSTP Configuration For this example, we will change the RSTP priority to make 8600-1 the root bridge and 8600-2 the backup root bridge. We will leave both 4550T-1 and 4548GT-2 with the default bridge priority setting of 32768.

  • Page 21: Verify Operations

    2.2.1 Verify RSTP Configuration and Root Bridge Step 1 – Verify that the RSTP is enabled and priority is set to 4096 on 8600-1 and 8192 on 8600-2 to make 8600-1 the root bridge and 8600-2 the backup root bridge...
  • Page 22 Bridge Forward Delay Time : 15 seconds Tx Hold Count PathCost Default Type : 32-bit ERS8600-2:5# show rstp config Result: ====================================================== RSTP Configuration ====================================================== Rstp Module Status Enabled Priority 8192 (0x2000) Stp Version rstp Mode Bridge Max Age : 20 seconds...
  • Page 23 STP Traps: Enabled Step 2 – Verify that the RSTP root is 8600-1: ERS8600-1:5# show spanning-tree rstp status Result: ============================================================ RSTP Status Information ============================================================ Designated Root 10:00:00:e0:7b:b3:04:01 Stp Root Cost Stp Root Port Stp Max Age : 20 seconds...
  • Page 24 On an ERS8600 using PPCLI, enter the command show sys info. On each switch, verify the following information: Option Verify Root Verify that the RSTP root bridge is 8600-1 whose address is 00:E0:7B:B3:04:01. Root Port Verify that under normal operations that the correct port to the Root is used: ...
  • Page 25 Verify that under normal operations that the correct port to the RSTP root bridge is used:  8600-2: Port 1/24 (assuming RSTP port priority on 8600-1 port 4/24 changed from default setting of 128 to 16)  4550T-1: Port 33 ...

  • Page 26: Mstp Configuration Example - One Region

    C3750-2 will be configured as the root bridge for MSTI 2 and backup root for MSTI 1  8600-1 will be configured with a CIST and MSTI 1 priority of 12288 so that will become both CIST and MSTI 1 root if both C3750-1 and C3750-2 should fail ...

  • Page 27: Figure 6: Mstp Example With One Region - Cist Instance 0 Data Flow

    8600-2 will be configured with a MSTI 2 priority of 12288 so that it will become MSTI 2 root if both C3750- 1 and C3750-2 should fail After all the switches have been configured using the above settings, the traffic flow for each MSTI instance and CIST should be as that shown in the following diagrams.

  • Page 28: Configuration

    Figure 8: MSTP Example with One Region – MSTI 2 Data Flow Configuration 3.1.1 Set Spanning Tree Mode to MSTP ERS8600-1: Step 1 – Set the bootconfig Spanning Tree mode to MSTP ERS-8610:5(config)# boot config flags spanning-tree-mode mstp ERS-8610:5(config)# save bootconfig ERS-8610:5(config)# boot –y...
  • Page 29 4550T(config)# boot Reboot the unit(s) (y/n) ? y 4550T(config)# snmp-server name 4550T-1 4550T-1(config)# banner disabled ERS4528GT-2: Step 1 – Set Spanning Tree Operation mode to MSTP 4548GT#(config)# spanning-tree op-mode mstp 4548GT#(config)# write memory 4548GT#(config)# boot Reboot the unit(s) (y/n) ? y...
  • Page 30 ERS8600-2:5# config vlan 1100 create byport-mstprstp 2 ERS8600-2:5# config ethernet 1/23,1/24,1/34,1/36 perform-tagging enable ERS8600-2:5# config vlan 1 ports remove 1/5,1/6,1/23,1/24,1/34,1/36 ERS8600-2:5# config vlan 200 ports add 1/23,1/24,1/34,1/36 ERS8600-2:5# config vlan 1000 ports add 1/5,1/23,1/24,1/34,1/36 ERS8600-2:5# config vlan 1100 ports add 1/6,1/23,1/24,1/34,1/36 ERS4550T-1: Step 1 –...
  • Page 31 C3750-1(config-vlan)# vlan 1000 C3750-1(config-vlan)# vlan 1100 C3750-1(config-vlan)# exit C3750-1(config)# interface range gigabitEthernet 7/0/21 – 24 C3750-1(config-if-range)# switchport trunk encapsulation dot1q C3750-1(config-if-range)# switchport mode trunk C3750-1(config-if-range)# switchport trunk allowed vlan 200,1000,1100 C3750-1(config-if-range)# exit C3750-1(config)# interface gigabitEthernet 7/0/5 C3750-1(config-if)# switchport mode access...
  • Page 32 On the ERS4500, if a port is removed from the default VLAN (VLAN 1) prior to adding the port as a port member to a different VLAN, STP participation is disabled for this port. Hence, at an  interface level, Spanning Tree Port must be re-enabled for each removed port. This inconvenience can be avoided if the port or ports are removed from the default VLAN after the port or ports are added to a different VLAN.
  • Page 33 C3750-1(config-mst)# revision 1 C3750-1(config-mst)# instance 1 vlan 200,1000 C3750-1(config-mst)# instance 2 vlan 1100 C3750-1(config-mst)# exit C3750-1(config)# spanning-tree mst 0,1 priority 4096 C3750-1(config)# spanning-tree mst 2 priority 8192 C3750-2: Step 1 – Add MSTP configuration C3750-2(config)# spanning-tree mst configuration C3750-2(config-mst)# name region1...

  • Page 34: Verify Operations

    3.1.4 Management VLAN Configuration ERS8600-1: Step 2 – Add management IP address and add port members ERS8600-1:5(config)# interface vlan 200 ERS8600-1:5(config-if)# ip address 10.12.200.12 255.255.255.0 ERS8600-1:5(config-if)# exit ERS8600-2: Step 2 – Add management IP address ERS8600-2:5# config vlan 200 ip create 10.12.200.13/24 ERS4550T-1: Step 2 –...
  • Page 35 Result: ============================================================== MSTP Status ============================================================== -------------------------------------------------------------- Bridge Address : 00:e0:7b:b3:04:01 Cist Root 10:00:00:0d:65:cc:09:00 Cist Regional Root 10:00:00:0d:65:cc:09:00 Cist Root Port 1/23 Cist Root Cost Cist Regional Root Cost : 200000 Cist Instance Vlan Mapped : 1-199,201-999,1001-1024 Cist Instance Vlan Mapped2k...
  • Page 36 Result: Bridge Address: 00:19:69:E6:40:00 Cist Root: 10:00:00:0D:65:CC:09:00 Cist Regional Root: 10:00:00:0D:65:CC:09:00 Cist Root Port: Cist Root Cost: Cist Regional Root Cost: 400000 Cist Max Age: 20 seconds Cist Forward Delay: 15 seconds C3750-2# show spanning-tree mst 0 Result: ##### MST0...
  • Page 37  8600-1: Port 1/23  8600-2: Port 1/24  4550T-1: Port 33  4548GT-2: Port 35  C3750-2: Either port 1/0/21 or 1/0/22 3.2.2 Verify MSTI 1 Root and port forwarding state Step 1 – Verify that the MSTI 1 root is C3750-1:...
  • Page 38 Msti Instance Vlan Mapped3k Msti Instance Vlan Mapped4k 4550T-1# show spanning-tree mstp msti config 1 Result: Msti Bridge Regional Root: 10:00:00:0D:65:CC:09:00 Msti Bridge Priority (hex): F000 Msti Root Cost: 400000 Msti Root Port: Msti State: Enabled VLAN members ------ ------ ------ ------ ------ ------ ------ ------...
  • Page 39 Gi7/0/24 Desg FWD 200000 128.348 C3750-2# show spanning-tree mst 1 Result: ##### MST1 vlans mapped: 200,1000 Bridge address 000f.9053.d300 priority 8193 (8192 sysid 1) Root address 000d.65cc.0900 priority 4097 (4096 sysid 1) port Gi1/0/21 cost 20000 rem hops 19...
  • Page 40 Result: ================================================================================ MSTI Port Roles and States ================================================================================ Port-Index Instance-Id Port-Role Port-State Port-STP Port-Oper -------------------------------------------------------------------------------- 1/23 Alternate Discarding Enabled Enabled 1/23 Root Forwarding Enabled Enabled 1/24 Root Forwarding Enabled Enabled 1/24 Alternate Discarding Enabled Enabled 1/34 Designated Forwarding Enabled...
  • Page 41 MSTI 1 Root Port Verify that under normal operations that the correct port to the MIST 1 root bridge is used:  8600-1: Port 1/23  8600-2: Port 1/24  4550T-1: Port 33  4548GT-2: Port 35  C3750-2: Either port 1/0/21 or 1/0/22 VLANs Verify that only VLANs 200 and 1000 are configured for MSTI 1.
  • Page 42 Msti Root Port 1/23 Msti Instance Vlan Mapped Msti Instance Vlan Mapped2k 1100 Msti Instance Vlan Mapped3k Msti Instance Vlan Mapped4k 4550T-1# show spanning-tree mstp msti config 2 Result: Msti Bridge Regional Root: 10:00:00:0F:90:53:D3:00 Msti Bridge Priority (hex): F000...
  • Page 43 ---------------- ---- --- --------- -------- -------------------------------- Gi7/0/21 Root FWD 20000 128.345 Gi7/0/22 Altn BLK 20000 128.346 Gi7/0/23 Desg FWD 200000 128.347 Gi7/0/24 Desg FWD 200000 128.348 C3750-2# show spanning-tree mst 2 Result: ##### MST2 vlans mapped: 1100 Bridge address 000f.9053.d300...
  • Page 44 Result: ================================================================================ MSTI Port Roles and States ================================================================================ Port-Index Instance-Id Port-Role Port-State Port-STP Port-Oper -------------------------------------------------------------------------------- 1/23 Alternate Discarding Enabled Enabled 1/23 Root Forwarding Enabled Enabled 1/24 Root Forwarding Enabled Enabled 1/24 Alternate Discarding Enabled Enabled 1/34 Designated Forwarding Enabled...
  • Page 45 MSTI 2 Root Port Verify that under normal operations that the correct port to the MIST 2 root bridge is used:  8600-1: Port 1/24  8600-2: Port 1/23  4550T-1: Port 34  4548GT-2: Port 36  C3750-2: Either port 1/0/21 or 1/0/22 VLANs Verify that only VLAN 1100 is configured for MSTI 2.

  • Page 46: Mstp Configuration Example - Two Regions

    8600-1 port 1/23. In the region named ―region2‖, 8600-1 will become the root bridge for MSTI 1 while 8600-2 will become the root bridge for MSTI 2. 8600-1 will also become the CIST Regional Root for the region named ―region2‖ based on the priority settings configured.

  • Page 47: Figure 10: Mstp Example With Two Regions - Msti 1 Data Flow

    After all the switches have been configured using the above settings, the traffic flow for each MSTI instance should as that shown in the following diagrams. Figure 10: MSTP Example with Two Regions – MSTI 1 Data Flow Figure 11: MSTP Example with Two Regions – MSTI 2 Data Flow...

  • Page 48: Configuration

    Step 1 – Verify that the CIST root bridge is C3750-1. Verify that the regional root bridge is C3750-1 for the region named ―region1‖ and 8600-2 for the region named ―region2‖. There should only be one forwarding port between the regions which should be via port 1/23 on 8600-1.
  • Page 49 Cist Instance Vlan Mapped3k : 2049-3072 Cist Instance Vlan Mapped4k : 3073-4094 Cist Max Age : 20 seconds Cist Forward Delay : 15 seconds ERS8600-2:5# show mstp status Result: =========================================================== MSTP Status =========================================================== ----------------------------------------------------------- Bridge Address : 00:80:2d:ba:d4:01 Cist Root...
  • Page 50 Result: Bridge Address: 00:1B:25:F3:90:00 Cist Root: 10:00:00:0D:65:CC:09:00 Cist Regional Root: 30:00:00:E0:7B:B3:04:01 Cist Root Port: Cist Root Cost: 200000 Cist Regional Root Cost: 200000 Cist Max Age: 20 seconds Cist Forward Delay: 15 seconds C3750-1# show spanning-tree mst 0 Result:...
  • Page 51 C3750-2: Either port 1/0/21 or 1/0/22 4.2.2 Verify MSTI 1 Root and port forwarding state Step 1 – Verify that the MSTI 1 root is 8600-1 for the region named ―region2‖ and C3750-1 is the MSTI 1 root for the region named ―region1‖:...
  • Page 52 Msti Instance Vlan Mapped2k Msti Instance Vlan Mapped3k Msti Instance Vlan Mapped4k ERS8600-2:5# show mstp instance 1 Result: ============================================================== ============================================================ MSTP Instance Status ============================================================ Instance Id Msti Bridge Regional Root 30:00:00:e0:7b:b3:04:01 Msti Bridge Priority : 32768 (0x8000) Msti Root Cost...
  • Page 53 Msti State: Enabled VLAN members ------ ------ ------ ------ ------ ------ ------ ------ 1000 C3750-1# show spanning-tree mst 1 Result: ##### MST1 vlans mapped: 200,1000 Bridge address 000d.65cc.0900 priority 4097 (4096 sysid 1) Root this switch for MST1 Interface Role Sts Cost Prio.Nbr Type...
  • Page 54 ================================================================================ Port-Index Instance-Id Port-Role Port-State Port-STP Port-Oper -------------------------------------------------------------------------------- Disabled Discarding Enabled Disabled Disabled Discarding Enabled Disabled 1/23 Master Forwarding Enabled Enabled 1/23 Master Forwarding Enabled Enabled 1/24 Alternate Discarding Enabled Enabled 1/24 Alternate Discarding Enabled Enabled 1/33 Designated Forwarding...
  • Page 55 MSTI instance will not come up on the corresponding switch. 4.2.3 Verify MSTI 2 Root and port forwarding state Step 1 – Verify that the MSTI 2 root is C3750-2 for region named ―region1‖ and the MSTI 2 root is 8600-2 for region named ―region2‖:...
  • Page 56 Msti Root Port 1/33 Msti Instance Vlan Mapped Msti Instance Vlan Mapped2k 1100 Msti Instance Vlan Mapped3k Msti Instance Vlan Mapped4k ERS8600-2:5# show mstp instance 2 Result: ============================================================== MSTP Instance Status ============================================================== Instance Id Msti Bridge Regional Root 30:00:00:80:2d:ba:d4:01...
  • Page 57 Msti Root Port: Msti State: Enabled VLAN members ------ ------ ------ ------ ------ ------ ------ ------ 1100 C3750-1# show spanning-tree mst 2 Result: ##### MST2 vlans mapped: 1100 Bridge address 000d.65cc.0900 priority 28674 (28672 sysid 2) Root address 000f.9053.d300...
  • Page 58 Result: ================================================================================ MSTI Port Roles and States ================================================================================ Port-Index Instance-Id Port-Role Port-State Port-STP Port-Oper -------------------------------------------------------------------------------- Disabled Discarding Enabled Disabled Disabled Discarding Enabled Disabled 1/23 Master Forwarding Enabled Enabled 1/23 Master Forwarding Enabled Enabled 1/24 Alternate Discarding Enabled Enabled 1/24...
  • Page 59 Verify Root Verify that the MIST 2 root bridge is C3750-2 whose address is 000f.9053.d300. Verify that the MSTI 2 root bridge is 8600-2 for region named ―region2‖ whose address is 00:80:2d:ba:d4:01 MSTI 2 Root Port Verify that under normal operations that the correct port to the MIST 2 root bridge is used: ...

  • Page 60: Software Baseline

    5. Software Baseline The software levels used in the document are based on the following:  ERS 4500 Release 5.3  ERS 8600 Release 5.1  Cisco 3750 Must be at least 12.2(25)SEC or greater RSTP/MSTP Technical Configuration Guide July 2010...

  • Page 61: Reference Documentation

    6. Reference Documentation Document Title Publication Number Description Configuration — VLANs, NN47200-502 Avaya Ethernet Routing Switch 5000 Series Spanning Tree, and Link Aggregation Configuration — VLANs, NN47205-501 Avaya Ethernet Routing Switch 4500 Series Spanning Tree, and MultiLink Trunking Configuration — VLANs,...

  • Page 62: Customer Service

    7. Customer service Visit the Avaya Web site to access the complete range of services and support that Avaya provides. Go www.avaya.com or go to one of the pages listed in the following sections. 7.1 Getting technical documentation To download and print selected technical publications and release notes directly from the Internet, go to www.avaya.com/support.

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