VSS-Enabled Campus Best Practice Configuration Example
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- Raymond Stanley
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1 APPENDIXA VSS-Enabled Campus Best Practice Configuration Example Figure A-1 illustrates the baseline best practice configuration required to set up basic VSS enabled network. The circle indicates the essential steps required to create the VSS systems from standalone. The red text highlights the important CLI information with VSS configuration. Comments are provided in blue italic font. Figure A-1 Overall VSS-Enabled Campus Best Practice Configuration Summary 1 switch virtual domain 10 switch mode virtual mac-address use-virtual dual-active detection pagp trust channel-group Switch 1 Switch 2 2 interface Port-channel1 description VSL Link from Switch 1 no ip address switch virtual link 1 mls qos trust cos no mls qos channel-consistency interface Port-channel2 description VSL Link from Switch 2 no ip address switch virtual link 2 mls qos trust cos no mls qos channel-consistency Switch 1 Switch 2 interface ten 1/5/4 channel-group 1 mode on interface ten 1/1/1 channel-group 1 mode on interface ten 2/5/4 channel-group 2 mode on interface ten 2/1/1 channel-group 2 mode on 3 interface GigabitEthernet1/8/23 description Access Switch switchport switchport trunk native vlan 202 switchport trunk allowed vlan 2,102 <snip> channel-group 202 mode desirable MEC interface Port-channel202 description Access Switch switchport switchport trunk native vlan 202 switchport trunk allowed vlan 2,102 interface GigabitEthernet2/8/23 description Access Switch switchport switchport trunk native vlan 202 switchport trunk allowed vlan 2,102 <snip> channel-group 202 mode desirable A-1
2 End-to-End Device Configurations VSS Specific VSS Global Configuration The end-to-end devices configuration is categorized into three major sections. Each section configuration contains specific CLI which is a required as part of best practice configuration and corresponding explanation. VSS and L2 Domain- Includes above base configuration as well as L2 domain configuration Access-layer- Sample L2 domain configuration L3 Domain - Includes global L3 configuration for VSS and core routers. Then separate section for specifics topologies (ECMP and MEC) for EIGRP and OSPF. In addition, the core devices configuration shown below are standalone router/devices. switch virtual domain 10 Must configure unique domain ID switch mode virtual switch 1 priority 110 Not needed, helps in operational mgmt switch 2 priority 100 Not needed, helps in operational mgmt dual-active exclude interface GigabitEthernet1/5/3 Connectivity to VSS during dual active mac-address use-virtual Required for consistent MAC address dual-active detection pagp trust channel-group 202 Enhanced PAgP based dual active detection redundancy Default SSO Enabled main-cpu auto-sync running-config mode sso Switch 1 interface Port-channel1 Unique port-channel number for SW 1 description VSL Link from Switch 1 no ip address switch virtual link 1 Defines switch ID for SW 1 mls qos trust cos no mls qos channel-consistency interface ten 1/5/4 channel-group 1 mode on EC mode is ON EtherChannel Managemeent Protocol off interface ten 1/1/1 channel-group 1 mode on Switch 2 interface Port-channel2 Unique port-channel number for SW 1 description VSL Link from Switch 2 no ip address switch virtual link 2 Defines switch ID for SW 2 mls qos trust cos no mls qos channel-consistency interface ten 2/5/4 A-2
3 channel-group 2 mode on EC mode is ON - EtherChannel Managemeent Protocoloff interface ten 2/1/1 channel-group 2 mode on Layer-2 Domain VSS udld enable vtp domain campus-test vtp mode transparent spanning-tree mode rapid-pvst no spanning-tree optimize bpdu transmission spanning-tree extend system-id spanning-tree vlan priority STP Root port-channel load-balance src-dst-mixed-ip-port Enhanced hash algorithem vlan 400 VLANs spanning multiple access-layer SWs name L2_ Spaned_VLAN _400 vlan 450 name L2_ Spaned_VLAN _450 vlan 500 name L2_ Spaned_VLAN _500 vlan 550 name L2_ Spaned_VLAN _550 vlan 600 name L2_ Spaned_VLAN _600 vlan 650 name L2_Spaned_VLAN_650 vlan 900 name NetMgmt_VLAN_900 vlan 999 name Unused_Port_VLAN_999 vlan 2 name cr stack-data-vlan vlan 102 name cr stack-voice-vlan interface Vlan2 Sample VLAN interface configuration ip address no ip redirects no ip unreachables hold-queue 150 in hold-queue 150 out A-3
4 VSS Multi-Chassis EtherChannel PAgP interface GigabitEthernet1/8/23 Interface on SW 1 description Access Switch Facing Interface switchport switchport trunk native vlan 202 switchport mode dynamic desirable Trunk mod dynamic and desirable switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 Only allow need VLANs for a given trunk Logging for link status logging event trunk-status Logging for trunk status Logging for port-channel status channel-group 202 mode desirable Define Port-channel, PAgP mode desirable interface GigabitEthernet2/8/23 Interface on SW 2 description Access Switch Facing Interface switchport switchport trunk native vlan 202 switchport mode dynamic desirable switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 logging event trunk-status channel-group 202 mode desirable interface Port-channel202 Automatically created by defining at interfaces description Access Switch MEC switchport switchport trunk native vlan 202 switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 logging event spanning-tree status STP logging enabled on port-channel spanning-tree portfast Optional - helps during initialization LACP LACP Sample Configuration interface GigabitEthernet1/8/23 description Access Switch Facing Interface switchport switchport trunk native vlan 202 switchport mode dynamic desirable switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 A-4
5 logging event trunk-status channel-protocol lacp channel-group 202 mode active interface GigabitEthernet2/8/23 description Access Switch Facing Interface switchport switchport trunk native vlan 202 switchport mode dynamic desirable switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 logging event trunk-status channel-protocol lacp channel-group 202 mode active interface Port-channel202 Automatically created by defining at interfaces description Access Switch MEC switchport switchport trunk native vlan 202 switchport trunk allowed vlan 2,102,400,450,500,550,600,650,900 logging event spanning-tree status spanning-tree portfast Optional - helps during initialization Access-Layer Switch Sample Configuration (Platform Specific Configuration Varies) interface GigabitEthernet0/27 description Uplink to VSS Switch Gig 1/8/24 switchport trunk native vlan 203 switchport mode dynamic desirable switchport trunk allowed vlan 3,103,400,450,500,550,600,650,900 logging event trunk-status srr-queue bandwidth share srr-queue bandwidth shape priority-queue out channel-group 1 mode desirable interface GigabitEthernet0/28 description Uplink to VSS Switch Gig 2/8/24 switchport trunk native vlan 203 A-5
6 switchport trunk allowed vlan 3,103,400,450,500,550,600,650,900 switchport mode dynamic desirable logging event trunk-status srr-queue bandwidth share srr-queue bandwidth shape priority-queue out channel-group 1 mode desirable interface Port-channel1 Automatically created by defining at interfaces description EC Uplink to VSS switchport trunk native vlan 203 switchport trunk allowed vlan 3,103,400,450,500,550,600,650,900 switchport mode dynamic desirable logging event spanning-tree status spanning-tree portfast Optional - helps during initialization Layer-3 Domain The Layer 3 domain represents VSS interconnection to the core-layer. The core-layer devices configuration shown below are standalone router/switch. Global Configuration mls ip cef load-sharing <option> Apply Campus Best Practices Multicast VSS ip multicast-routing ip pim rp-address GOOD-IPMC override RP mapping with filter ip access-list standard GOOD-IPMC permit permit permit permit Core 1 Standalone Router (No VSS) Core RP ANYCAST - Primary ip multicast-routing interface Loopback0 description MSDP PEER INT MSDP Loopback ip address A-6
7 interface Loopback1 description ANYCAST RP ADDRESS (PRIMARY) Anycast RP Primary ip address interface Loopback2 description Garbage-CAN RP ip address interface Port-channel1 Core 1- Core2 L3 for MSDP description Channel to Peer Core Node ip address ip access-list standard GOOD-IPMC permit permit permit permit ip msdp peer connect -source Loopback0 MSDP Configuration ip msdp description ANYCAST-PEER-6k-core-2 ip msdp cache -sa-state ip msdp originator-id Loopback0 Core 2 Standalone Router (No VSS) ip multicast-routing interface Loopback0 description MSDP PEER INT ip address interface Loopback1 description ANYCAST RP ADDRESS ip address Secondary ANYCAST RP delay 600 interface Loopback2 description Garbage-CAN RP ip address interface Port-channel1 description Channel to Peer Core node ip address ip pim rp-address GOOD-IPMC override ip access-list standard GOOD-IPMC permit permit permit permit A-7
8 ip msdp peer connect-source Loopback0 ip msdp description ANYCAST-PEER-6k-core-1 ip msdp cache-sa-state ip msdp originator-id Loopback0 EIGRP MEC VSS router eigrp 100 no passive-interface Port-channel200 no passive-interface Port-channel201 network eigrp log-neighbor-warnings eigrp log-neighbor-changes no auto-summary eigrp router-id eigrp event-log-size 3000 nsf Enable NSF Capability interface Port-channel200 Create L3 MEC Interface first description 20 Gig MEC to CORE-1 (cr /1-4/3) ip address ip summary-address eigrp Summarization for Access-subnets ip summary-address eigrp interface Port-channel201 description 20 Gig to CORE-2 (cr /1-4/3) ip address ip summary-address eigrp ip summary-address eigrp interface TenGigabitEthernet1/2/1 description 10 GigE to Core 1 no ip address A-8
9 channel-group 200 mode desirable interface TenGigabitEthernet1/2/2 description 10 GigE to Core 2 no ip address channel-group 201 mode desirable interface TenGigabitEthernet2/2/1 description to core 1 no ip address logging event spanning-tree status channel-group 200 mode desirable interface TenGigabitEthernet2/2/2 description 10 GigE to Core 2 no ip address channel-group 201 mode desirable Core 1 Standalone Router (No VSS) router eigrp 100 no passive-interface Port-channel1 no passive-interface Port-channel20 no passive-interface Port-channel221 network no auto-summary eigrp log-neighbor-warnings eigrp log-neighbor-changes eigrp event-log-size 3000 interface Port-channel20 description 20 Gig MEC to VSS 1/2/1 2/2/1 A-9
10 ip address Core 2 Standalone Router (No VSS) router eigrp 100 no passive-interface Port-channel1 no passive-interface Port-channel20 no passive-interface Port-channel221 network no auto-summary eigrp log-neighbor-warnings eigrp log-neighbor-changes eigrp event-log-size 3000 interface Port-channel21 description 20 Gig to VSS 1/2/2-2/2/2 ip address EIGRP ECMP VSS router eigrp 100 no passive-interface TenGigabitEthernet1/2/1 no passive-interface TenGigabitEthernet1/2/2 no passive-interface TenGigabitEthernet2/2/1 no passive-interface TenGigabitEthernet2/2/2 network no auto-summary eigrp router-id eigrp log-neighbor-warnings eigrp log-neighbor-changes eigrp event-log-size 3000 nsf Enable NSF Capability interface TenGigabitEthernet1/2/1 description 10 GigE to Core 1 A-10
11 ip address ip summary-address eigrp interface TenGigabitEthernet1/2/2 description 10 GigE to Core 2 ip address ip summary-address eigrp interface TenGigabitEthernet2/2/1 description to Core 1 ip address ip summary-address eigrp interface TenGigabitEthernet2/2/2 description 10 GigE to Core 2 ip address ip summary-address eigrp Core 1 Standalone Router (No VSS) router eigrp 100 no passive-interface TenGigabitEthernet4/1 no passive-interface TenGigabitEthernet4/3 network no auto-summary A-11
12 eigrp log-neighbor-warnings eigrp log-neighbor-changes eigrp event-log-size 3000 interface TenGigabitEthernet4/1 description To VSS Ten1/2/1 ip address interface TenGigabitEthernet4/3 description To VSS Ten2/2/1 ip address Core 2 Standalone Router (No VSS) router eigrp 100 no passive-interface TenGigabitEthernet4/1 no passive-interface TenGigabitEthernet4/3 network no auto-summary eigrp log-neighbor-warnings eigrp log-neighbor-changes eigrp event-log-size 3000 interface TenGigabitEthernet4/1 description To VSS Ten 1/2/2 ip address interface TenGigabitEthernet4/3 description To VSS Ten 2/2/2 ip address A-12
13 OSPF MEC VSS router ospf 100 router-id log-adjacency-changes detail auto-cost reference-bandwidth Optional nsf Enable NSF Capability area 120 stub no-summary area 120 range cost 10 area 120 range cost 10 no passive-interface Port-channel200 no passive-interface Port-channel201 network area 120 network area 0 network area 120 interface Port-channel200 description 20 Gig MEC to VSS (cr /1-4/3) ip address interface Port-channel201 description 20 Gig to VSS (cr /1-4/3) ip address A-13
14 Core 1 Standalone Router No VSS) router ospf 100 router-id log-adjacency-changes detail Helps in NSF Restart Activities auto-cost reference-bandwidth Optional no passive-interface Port-channel1 no passive-interface Port-channel20 network area 0 interface Port-channel20 description 20 Gig MEC to VSS 1/2/1 2/2/1 ip address Core 2 Standalone Router (No VSS) router ospf 100 router-id log-adjacency-changes detail auto-cost reference-bandwidth Optional no passive-interface Port-channel1 no passive-interface Port-channel20 network area 0 interface Port-channel21 description 20 Gig to VSS 1/2/2-2/2/2 ip address OSPF ECMP VSS router ospf 100 router-id log-adjacency-changes detail auto-cost reference-bandwidth Optional nsf Enable NSF Capability area 120 stub no-summary A-14
15 area 120 range cost 10 area 120 range cost 10 no passive-interface TenGigabitEthernet1/2/1 no passive-interface TenGigabitEthernet1/2/2 no passive-interface TenGigabitEthernet2/2/1 no passive-interface TenGigabitEthernet2/2/2 network area 120 network area 0 network area 120 interface TenGigabitEthernet1/2/1 description 10 GigE to Core 1 ip address interface TenGigabitEthernet1/2/2 description 10 GigE to Core 2 ip address interface TenGigabitEthernet2/2/1 description to Core 1 ip address interface TenGigabitEthernet2/2/2 description 10 GigE to Core 2 ip address A-15
16 Core 1 Standalone Router (No VSS) router ospf 100 router-id log-adjacency-changes detail auto-cost reference-bandwidth Optional no passive-interface GigabitEthernet2/5 no passive-interface TenGigabitEthernet4/1 no passive-interface TenGigabitEthernet4/3 no passive-interface Port-channel1 network area 0 interface TenGigabitEthernet4/1 description To VSS Ten1/2/1 ip address interface TenGigabitEthernet4/3 description To VSS Ten2/2/1 ip address Core 2 Standalone Router (No VSS) router ospf 100 router-id log-adjacency-changes detail auto-cost reference-bandwidth Optional no passive-interface GigabitEthernet2/5 no passive-interface TenGigabitEthernet4/1 no passive-interface TenGigabitEthernet4/3 no passive-interface Port-channel1 network area 0 A-16
17 interface TenGigabitEthernet4/1 description To VSS Ten 1/2/2 ip address interface TenGigabitEthernet4/3 description To VSS Ten 2/2/2 ip address A-17
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