VPC Question

[john-cabrera]

I have 2 5548's and I set them up with VPC Peer-Links (port-Channel 101). Its up and running.  As a test, I configured a 3560 for VPC (port channel 9).  However, only vlan 10 is active.  Do I need to add all the vlans in port-channel 101? Here is my config

interface port-channel9
  switchport mode trunk
  spanning-tree port type network
  speed 1000
  vpc 9

interface Ethernet1/9
  switchport mode trunk
  spanning-tree port type network
  speed 1000
  channel-group 9 mode active

interface port-channel101
  description Connect-other-5548
  switchport mode trunk
  switchport trunk allowed vlan 10,101
  spanning-tree port type network
  speed 10000
  vpc peer-link

interface Ethernet1/32
  description VPC Connection to other 5548
  switchport mode trunk
  switchport trunk allowed vlan 10,101
  spanning-tree port type network
  channel-group 101 mode active

VPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans
--   ----   ------ --------------------------------------------------
1    Po101  up     10

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------

9      Po9         up     success     success                    10

[Richard Bradfield]

In port channel 9 all vlans will be active by default, but port channel you have only 10 and 101, is 101 an active vlan?  are there any other vlans that should be active. perhaps you need "switchport trunk allowed vlan all" on port channel 101

HTH

Richard.

[Ganesh Hariharan]

Hello John,

The peer-link PortChannel connects vPC peers and carries all access VLANs (defined by the user). This link also carries additional traffic that the user does not need to define: more specifically, BPDUs and HSRP hellos and MAC address synchronization between the vPC peers.

It is a special link for carrying L2 traffic between the VPC peer switches when there is a link failure.

This link is by far the most important component of the vPC system. Although its failure does not disrupt existing vPC flows, its failure can impair the establishment of new flows and isolate orphan ports. 

So add what are access vlan you are running on those switches to make peer link effective.

Hope it Helps..

-GI

Rate if it Helpss

[Masoud Pourshabanian]

Hello,

No, you should not do that.

Any non-vPC VLANs should be not allowed on the vPC peer-link trunk.

Please check the links below for sample configuration and check list.

http://www.netcraftsmen.com/port-channels-vpcs-and-spanning-tree-issues

http://docwiki.cisco.com/wiki/Cisco_Nexus_7000_Series_NX-OS_Troubleshooting_Guide_--_Troubleshooting_vPCs

Hope it helps,

Masoud