Nexus vPC inconsistencies due to different lag-id

[Dirk Feldhaus]

Hello,

I have a scenario where 2 Nexus9k are acting as vPC pair and a NetApp appliance is connected to both switches. The port on 1 switch is disabled due to vPC inconsistencies. The only difference I can spot is the number 32 and 52, respectively, in the lag-id. 

switch-1# show vpc consistency-parameters interface port-channel 17

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

Name Type Local Value Peer Value
------------- ---- ---------------------- -----------------------
lag-id 1 [(7f9b,                        [(7f9b,
0-23-4-ee-be-66, 82b3,                    0-23-4-ee-be-66, 82b3,
0, 0), (8000,                             0, 0), (8000,
2-a0-98-aa-fa-cf, 32,                     2-a0-98-aa-fa-cf, 52,
0, 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 0                          0
MTU 1 9000                                9000
vPC card type 1 Empty                     Empty
Allowed VLANs - 3967                      3967
Local suspended VLANs - -                 -
switch-1#

Does anyone know what these numbers (32 and 52) mean why they might be different?

Thanks

[Reza Sharifi]

Hi,

That is part of the Lag id and it should be the same on both sides.

Can you post the config for Po17?

Also, what is the output of "sh port-cha summ"?

HTH

[Dirk Feldhaus]

This is on Cisco ACI, so there is no traditional config for the port-channel.

In the meantime we bounced the vPC and it came back up correctly.

Now it is "52" on both sides. Do you have an idea where this number 52 and 32, respectively, are coming from. At the moment I'm not even sure if it is generated on the switch or the NetApp.

switch-1# 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)
M - Not in use. Min-links not met
F - Configuration failed
-------------------------------------------------------------------------------
Group Port- Type Protocol Member Ports
Channel
-------------------------------------------------------------------------------
...

17 Po17(SU) Eth LACP Eth1/5(P)
...