N7K/fabricpath/vPC peer link

[fab5freddy]

Hello

I'm having trouble understanding what the issue is.

I have 2 different networks, each with 2 pairs of N7K's (each using 2 VDC's) with multiple N5K's connected to all N7K's and both the VDC's.

My set-up works fine for one network but not for the other.

The problem is related to the vPC peer link on fabricpath.

I'm running NX-OS  version 6.1(4)

Following is output from my N7K's in the faulty network:

***************************************************************************
N7K11-ione# show vpc
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                     : 2  
vPC+ switch id                    : 111
Peer status                       : peer adjacency formed ok     
vPC keep-alive status             : peer is alive                
vPC fabricpath status             : peer is not reachable through fabricpath
Configuration consistency status  : success
Per-vlan consistency status       : success                      
Type-2 consistency status         : success
vPC role                          : primary                      
Number of vPCs configured         : 0  
Peer Gateway                      : Disabled
Dual-active excluded VLANs        : -
Graceful Consistency Check        : Enabled
Auto-recovery status              : Enabled (timeout = 240 seconds)
Fabricpath load balancing         : Disabled
Port Channel Limit                : limit to 244

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po1    up     765                                                   
N7k11-ione#
***************************************************************************
N7K12-ione# show vpc
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                     : 2  
vPC+ switch id                    : 111
Peer status                       : peer adjacency formed ok     
vPC keep-alive status             : peer is alive                
vPC fabricpath status             : peer is not reachable through fabricpath
Configuration consistency status  : success
Per-vlan consistency status       : success                      
Type-2 consistency status         : success
vPC role                          : secondary                    
Number of vPCs configured         : 0  
Peer Gateway                      : Disabled
Dual-active excluded VLANs        : -
Graceful Consistency Check        : Enabled
Auto-recovery status              : Enabled (timeout = 240 seconds)
Fabricpath load balancing         : Disabled
Port Channel Limit                : limit to 244

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po1    up     765                                                   
N7K12-ione#
***************************************************************************

Thanks for the help

Frederic

[InayathUlla Sharieff]

Hi Fedric,

Please check below:

For fabricpath isis adjacency to come up, the peer link needs to be a "P2P" interface not a "broadcast" interface.

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCty44132

HTH

Regards

Inayath

**********Plz rate if this info is helpfull************

[fab5freddy]

Hi

Thank you for the input but this isn't the case in my set-up.

The Po's are configured as P2P, see output:

N7K11-ione# show run all | section "interface port-channel1" | grep medium
  medium p2p
  medium p2p
  medium p2p

N7K12-ione# show run all | section "interface port-channel1" | grep medium
  medium p2p
  medium p2p
  medium p2p

(before doing a grep I had a look at the full config...)

Thank you

Frederic

[fab5freddy]

Hello

Before posting my question I had verified almost everything EXCEPT for fabricpath authentication!

Seems that I made a mistake in copy/pasting my config.

The fabric path authentication was missing on my port-channel used for peering.

But thanks for the input!

Frederic

[InayathUlla Sharieff · Accepted solution]

No Probs.

Happy to hear that. Could you please mark the thread as answered else people think that it is not answered and they have to go through the query. Thanks in advance.

Regards

Inayath.