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New Member

Nexus 3048 vPC doesn't form


I am building up vPC on 2 x Nexus 3048 and found that it did not work properly.

The current config as follows,

1. OS: n3000-uk9.5.0.3.U2.2.bin

2. Peer link: 10 x 1G (E1/1 - E1/10) on both devices (I am wondering that 1G interface supports vPC Peer-Link. I heard that upgrading to U3.2 image will work for 1G rather than 10G... please advise me)

3. They can ping each other via management IPs

4. Edge switches vPC have not been built yet (I am focusing on Peer-Link and vPC role selection)

Device-A# sh vpc


                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 200

Peer status                     : peer link is down            

vPC keep-alive status           : peer is alive                

Configuration consistency status: failed 

Per-vlan consistency status     : success                      

Configuration consistency reason: Consistency Check Not Performed

Type-2 consistency status       : success

vPC role                        : none established             

Number of vPCs configured       : 2  

Peer Gateway                    : Enabled

Dual-active excluded VLANs      : -

Graceful Consistency Check      : Disabled (due to peer configuration)

vPC Peer-link status


id   Port   Status Active vlans   

--   ----   ------ --------------------------------------------------

1    Po200  down   -                                                       

vPC status


id     Port        Status Consistency Reason                     Active vlans

------ ----------- ------ ----------- -------------------------- -----------

10     Po10        down   failed      Consistency Check Not      -         


20     Po20        down   failed      Consistency Check Not      -         


Device-A# sh run vpc

!Command: show running-config vpc

!Time: Wed Jun 13 10:49:29 2012

version 5.0(3)U2(2)

feature vpc

vpc domain 200

  role priority 100

  system-priority 4000

  peer-keepalive destination source



interface port-channel10

  vpc 10

interface port-channel20

  vpc 20

interface port-channel200

  vpc peer-link

Device-A# sh run int port 200

!Command: show running-config interface port-channel200

!Time: Wed Jun 13 10:50:24 2012

version 5.0(3)U2(2)

interface port-channel200

  description AUULTACTABC028 vPC Peer Link

  switchport mode trunk

  vpc peer-link

  switchport trunk native vlan 55

  switchport trunk allowed vlan 28-29,43-44,55-56

  spanning-tree port type network

  negotiate auto

I am planning to upgrade to U3.2 but would like to get advice what's the best solution (currently there is no spare 10G interfaces)



  • LAN Switching and Routing
Everyone's tags (1)
New Member

Nexus 3048 vPC doesn't form

Fortunately, I found the solution as upgrading to U3.(2) image.

This image supports 1G interface for Peer Link and vPC just came up without issues.

Hope this helps you those don't have enough 10G interfaces.

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