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Beginner

5548 Config Sync issue - Suspended by vPC

I have 2 UCS 6120 fabric interconnects which both have VPCs to 2 x 5548s.  First fabric interconnect uses Po260 & vPC 260 and second fabric interconnect uses Po261 & vPC 261.  I used config sync to add "spanning-tree port type edge trunk" to int po 260 & 261.  The commit worked properly, peers are in sync, etc.  The problem is when I committed the command, int po 260 & 261 on the secondary 5548 went into "suspended by vPC".  I can't figure out why they did this, the configurations are the same and all vPC consistency checks pass.  To fix the issue, all I had to do was bounce the port-channel on the secondary 5548 (shut/no shut) after which it came back online.  I only did this to Po260 so Po261 is still down so that I can troubleshoot further.  Please see below:

vPC domain id                     : 70 
Peer status                       : peer adjacency formed ok     
vPC keep-alive status             : peer is alive                
Configuration consistency status  : success
Per-vlan consistency status       : success                      
Type-2 consistency status         : success
vPC role                          : secondary                    
Number of vPCs configured         : 7  
Peer Gateway                      : Disabled
Dual-active excluded VLANs        : -
Graceful Consistency Check        : Enabled
Auto-recovery status              : Disabled

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans   
--   ----   ------ --------------------------------------------------
1    Po255  up     1,10-13,26-29,151-156,180-181,200,318,331,399-417,       
                   419-422,424-431,433-436,438-443,446-448,450,452-45       
                   3,455-458,460-465,467-471,480-494,498-499,503,602-       
                   633,644-657,659,663-664,698-701,800,805,850-851,89       
                   0-891,899-904,906,908,912-950,952-958,975,987-988,    ....

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
171    Po171       up     success     success                    1,10-13,26-
                                                                 29,151-156,
                                                                 180-181,200
                                                                 ,318,331,39
                                                                 9-417,41....
260    Po260       up     success     success                    10-13,26-29
                                                                 ,663-664,89
                                                                 0-891      
261    Po261       down*  success     success                    -

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

sh int po 261

port-channel261 is down (suspended by vpc)

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

Any help would be appreciated
 

2 REPLIES 2
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Cisco Employee

Did you check the o/p of 

Did you check the o/p of  show vpc consistency-parameters for the portchannel261?

Beginner

Yes, I did check that and all

Yes, I did check that and all parameters match as follows:

 

5548-2# sh vpc consistency-parameters int po 261

    Legend:
        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value            
-------------               ----  ---------------------- -----------------------
Shut Lan                    1     No                     No                   
STP Port Type               1     Edge Trunk Port        Edge Trunk Port      
STP Port Guard              1     None                   None                 
STP MST Simulate PVST       1     Default                Default              
lag-id                      1     [(7f9b,                [(7f9b,              
                                  0-23-4-ee-be-46, 8105, 0-23-4-ee-be-46, 8105,
                                   0, 0), (8000,          0, 0), (8000,       
                                  0-5-73-d4-d5-fc, 1, 0, 0-5-73-d4-d5-fc, 1, 0,
                                   0)]                    0)]                 
mode                        1     active                 active               
Speed                       1     10 Gb/s                10 Gb/s              
Duplex                      1     full                   full                 
Port Mode                   1     trunk                  trunk                
Native Vlan                 1     10                     10                   
MTU                         1     1500                   1500                 
Admin port mode             1                                                 
Allowed VLANs               -     10-13,26-29,663-664,89 10-13,26-29,663-664,89
                                  0-891                  0-891                
Local suspended VLANs       -     -                      -      

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