Data Center Multi-Layer VPC Design Aggregation Layer Failure Scenarios (LACP) Configuration Example: Part I

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Contents

Introduction

Test Details: GOALS OF THE TEST

Data Center Multi-Layer VPC design aggregation layer failure scenarios are depicted in this document. The tests involve a multiple VPC domain design with VPC extended from Core to Aggregation as well as Aggregation to Access. The Failure scenarios covered in this test document are the following

   * Failure of the Peer Keepalive link - simulated by the shutdown of Ethernet1/1 on AGG1 router
   * Failure of a single link in the Peer-link bundle- Simulated by shutting down either Ethernet2/1 on the AGG1 router
   * Failure of the peer-link port-channel- Simulated by shutting down the Port-channel 3000 interface between AGG1 and AGG2 routers
   * SFM module failure on Aggregation router
   * Supervisor Failure/switchover on an aggregation router
   * Linecard failure on the AGG1 router
   * Failure of an aggregation node

DATA TO RECORD

Verification of operation of VPC and its configuration using the following commands

   * show vpc brief
   * show port-channel summary
   * show port-channel traffic
   * show run int port-channel xxxx
   * show run vpc

ESTIMATED TIME 120 minutes


Design

Sample topology.jpg

Procedures

1. This document highlights the failure scenarios with the above mentioned topology in the Aggregation layer.

2. The following failures were conducted on the Aggregation layer to verify the operation and resiliency of VPC in a multi-domain VPC environment with the entire Data Center running on VPC.

  • Failure of the Peer Keepalive link - simulated by the shutdown of Ethernet1/1 on AGG1 router
  • Failure of a single link in the Peer-link bundle- Simulated by shutting down either Ethernet2/1 on the AGG1 router
  • Failure of the peer-link port-channel- Simulated by shutting down the Port-channel 3000 interface between AGG1 and AGG2 routers
  • SFM module failure on Aggregation router
  • Supervisor Failure/switchover on an aggregation router
  • Linecard failure on the AGG1 router
  • Failure of an aggregation node

Baseline Configurations for VPC on all routers

Configs for Core1-VDC1

CORE1-F10# show run vpc

!Command: show running-config vpc
!Time: Tue Aug 11 21:08:08 2009

version 4.2(1)
feature vpc

vpc domain 1
  peer-keepalive destination 11.21.1.2 source 11.21.1.1 vrf peerkeepalive


interface port-channel50
  vpc 50

interface port-channel100
  vpc 100

interface port-channel1000
  vpc peer-link
 
CORE1-F10# show run int vlan 100

!Command: show running-config interface Vlan100
!Time: Tue Aug 11 21:11:24 2009

version 4.2(1)

interface Vlan100
  no shutdown
  description Server Subnet - Vlan 100
  ip address 100.100.11.1/24
  ip router ospf 100 area 0.0.0.0
  hsrp 100
    preempt delay minimum 15
    priority 120
    timers  1  3
    ip 100.100.11.254

CORE1-F10# show run int port-channel 50

!Command: show running-config interface port-channel50
!Time: Tue Aug 11 21:11:29 2009

version 4.2(1)

interface port-channel50
  description Port-Channel to Northbound Spirent Test Port (via 6500)
  switchport
  switchport mode trunk
  vpc 50
  switchport trunk allowed vlan 1,100
  spanning-tree port type edge trunk
  spanning-tree bpdufilter enable

CORE1-F10# show run int port-channel 100

!Command: show running-config interface port-channel100
!Time: Tue Aug 11 21:11:31 2009

version 4.2(1)

interface port-channel100
  description vPC to Aggregation Layer
  switchport
  switchport mode trunk
  vpc 100
  switchport trunk allowed vlan 1,100

CORE1-F10# show run int port-channel 1000

!Command: show running-config interface port-channel1000
!Time: Tue Aug 11 21:11:34 2009

version 4.2(1)

interface port-channel1000
  description vPC Peerlink (eth 2/1,eth 4/1)
  switchport
  switchport mode trunk
  vpc peer-link
  switchport trunk allowed vlan 1,50,100
  spanning-tree port type network

CORE1-F10# show port-channel summary
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
50    Po50(SU)    Eth      LACP      Eth2/26(P)
100   Po100(SU)   Eth      LACP      Eth2/9(P)    Eth2/10(P)
1000  Po1000(SU)  Eth      LACP      Eth2/1(P)    Eth4/1(P)
CORE1-F10# show run int eth 2/26

!Command: show running-config interface Ethernet2/26
!Time: Tue Aug 11 21:11:46 2009

version 4.2(1)

interface Ethernet2/26
  description Connection to Catalyst 6500 te5/1 (for Spirent Connectivity)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 50 mode active
  no shutdown

CORE1-F10# show run int eth 2/9

!Command: show running-config interface Ethernet2/9
!Time: Tue Aug 11 21:11:50 2009

version 4.2(1)

interface Ethernet2/9
  description Connection to AGG2 eth 2/17
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 100 mode active
  no shutdown

CORE1-F10# show run int eth 2/10

!Command: show running-config interface Ethernet2/10
!Time: Tue Aug 11 21:11:52 2009

version 4.2(1)

interface Ethernet2/10
  description Connection to AGG1 eth 2/17
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 100 mode active
  no shutdown

CORE1-F10# show run int eth 2/1

!Command: show running-config interface Ethernet2/1
!Time: Tue Aug 11 21:11:55 2009

version 4.2(1)

interface Ethernet2/1
  description vPC Peerlink Member Port #1 (por 1000)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,50,100
  rate-mode dedicated force
  udld aggressive
  channel-group 1000 mode active
  no shutdown

CORE1-F10# show run int eth 4/1

!Command: show running-config interface Ethernet4/1
!Time: Tue Aug 11 21:11:59 2009

version 4.2(1)

interface Ethernet4/1
  description vPC Peerlink Member Port #2 (por 1000)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,50,100
  rate-mode dedicated force
  udld aggressive
  channel-group 1000 mode active
  no shutdown

CORE1-F10# show vpc brief
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1
Peer status                     : peer adjacency formed ok
vPC keep-alive status           : peer is alive
Configuration consistency status: success
vPC role                        : secondary
Number of vPCs configured       : 2
Peer Gateway                    : Disabled
Dual-active excluded VLANs      : -

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans
--   ----   ------ --------------------------------------------------
1    Po1000 up     1,100

vPC status
----------------------------------------------------------------------
id   Port   Status Consistency Reason                     Active vlans
--   ----   ------ ----------- -------------------------- ------------
50   Po50   up     success     success                    1,100
100  Po100  up     success     success                    1,100       

Configs for Core2-VDC1

CORE2-F11# show run vpc

!Command: show running-config vpc
!Time: Tue Aug 11 22:56:59 2009

version 4.2(1)
feature vpc

vpc domain 1
  peer-keepalive destination 11.21.1.1 source 11.21.1.2 vrf peerkeepalive


interface port-channel50
  vpc 50

interface port-channel100
  vpc 100

interface port-channel1000
  vpc peer-link

CORE2-F11# show run int port-channel 50

!Command: show running-config interface port-channel50
!Time: Tue Aug 11 22:57:05 2009

version 4.2(1)

interface port-channel50
  description Port-Channel to Northbound Spirent Test Port (via 6500)
  switchport
  switchport mode trunk
  vpc 50
  switchport trunk allowed vlan 1,100
  spanning-tree port type edge trunk
  spanning-tree bpdufilter enable

CORE2-F11# show run int port-channel 100

!Command: show running-config interface port-channel100
!Time: Tue Aug 11 22:57:09 2009

version 4.2(1)

interface port-channel100
  description vPC to Aggregation Layer
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  vpc 100

CORE2-F11# show run int port-channel 1000

!Command: show running-config interface port-channel1000
!Time: Tue Aug 11 22:57:14 2009

version 4.2(1)

interface port-channel1000
  description vPC Peerlink (eth 2/1, eth 4/1)
  switchport
  switchport mode trunk
  vpc peer-link
  switchport trunk allowed vlan 1,100
  spanning-tree port type network

CORE2-F11# show port-channel summary
Flags:  D - Down        P - Up in port-channel (members)
        I - Individual  H - Hot-standby (LACP only)
        s - Suspended   r - Module-removed
        S - Switched    R - Routed
        U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port-       Type     Protocol  Member Ports
      Channel
--------------------------------------------------------------------------------
50    Po50(SU)    Eth      LACP      Eth2/26(P)
100   Po100(SU)   Eth      LACP      Eth2/9(P)    Eth2/10(P)
1000  Po1000(SU)  Eth      LACP      Eth2/1(P)    Eth4/1(P)
CORE2-F11# show run int eth 2/26

!Command: show running-config interface Ethernet2/26
!Time: Tue Aug 11 22:57:24 2009

version 4.2(1)

interface Ethernet2/26
  description Connection to Catalyst 6500 te5/1 (for Spirent Connectivity)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 50 mode active
  no shutdown

CORE2-F11# show run int eth 2/9

!Command: show running-config interface Ethernet2/9
!Time: Tue Aug 11 22:57:27 2009

version 4.2(1)

interface Ethernet2/9
  description Connection to AGG1 eth 2/18
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 100 mode active
  no shutdown

CORE2-F11# show run int eth 2/10

!Command: show running-config interface Ethernet2/10
!Time: Tue Aug 11 22:57:30 2009

version 4.2(1)

interface Ethernet2/10
  description Connection to AGG2 eth 2/18
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  channel-group 100 mode active
  no shutdown

CORE2-F11# show run int eth 2/1

!Command: show running-config interface Ethernet2/1
!Time: Tue Aug 11 22:57:32 2009

version 4.2(1)

interface Ethernet2/1
  description vPC Peerlink Member Port #1 (por 1000)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  udld aggressive
  channel-group 1000 mode active
  no shutdown

CORE2-F11# show run int eth 4/1

!Command: show running-config interface Ethernet4/1
!Time: Tue Aug 11 22:57:35 2009

version 4.2(1)

interface Ethernet4/1
  description vPC Peerlink Member Port #2 (por 1000)
  switchport
  switchport mode trunk
  switchport trunk allowed vlan 1,100
  rate-mode dedicated force
  udld aggressive
  channel-group 1000 mode active
  no shutdown

CORE2-F11# show run int vlan 100

!Command: show running-config interface Vlan100
!Time: Tue Aug 11 22:57:41 2009

version 4.2(1)

interface Vlan100
  no shutdown
  description Server Subnet - Vlan 100
  ip address 100.100.11.2/24
  ip router ospf 100 area 0.0.0.0
  hsrp 100
    preempt delay minimum 15
    timers  1  3
    ip 100.100.11.254

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