[c-nsp] Inconsistent vlan (6500, spanning tree)

[Clinton Work]

Is the new backup link just a dark fiber connection between the two 
boxes? From the error message it looks like the frames are being 
seriously corrupted at some point and that is causing the problems. 

The SPANTREE-SP-2-RECV_PVID_ERR error message indicates that the PVST+ 
BPDU for vlan 53 was received on vlan 55.  Looking at your configuration 
I don't see how this is possible.  I have seen some strange behavior 
with faulty Supervisors, but nothing like this. 

> Hi,
>
> Tonight we tried to bring up a second link between two 6500 (backup
> link). After bringing the link up one of the 6500 started logging
> (6500-2, config below):
>
> Dec  4 01:54:13.067 NZDT: %SPANTREE-SP-2-RECV_PVID_ERR: Received BPDU
> with inconsistent peer vlan id 53 on GigabitEthernet1/48 VLAN55.
> Dec  4 01:54:13.067 NZDT: %SPANTREE-SP-2-BLOCK_PVID_PEER: Blocking
> GigabitEthernet1/48 on VLAN0053. Inconsistent peer vlan.
>   


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Clinton Work
Airdrie, AB