Need help in understanding STP logs

Adding subject

Ramesh.

________________________________
 From: ramesh Kumar
<rameshkumar123321_at_yahoo.com>
To: "ccielab_at_groupstudy.com"
<ccielab_at_groupstudy.com>
Sent: Tuesday, March 12, 2013 10:00 AM
Subject:
Folks,

We are seeing this log in our switch. I am suspecting someone has
connected a switch with native vlan mismatch to this port.

019109: Mar 12
03:26:55.293 UTC: %DTP-5-TRUNKPORTON: Port Gi3/36 has become dot1q trunk
019110: Mar 12 03:26:55.573 UTC: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with
inconsistent peer vlan id 1 on GigabitEthernet3/36 VLAN39.
019111: Mar 12
03:26:55.573 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet3/36
on MST0. Inconsistent local vlan.
019112: Mar 12 03:26:55.793 UTC:
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet3/36, changed
state to up
019113: Mar 12 03:27:09.793 UTC: %SPANTREE-2-UNBLOCK_CONSIST_PORT:
Unblocking GigabitEthernet3/36 on MST0. Port consistency restored.
019114: Mar
12 03:27:11.612 UTC: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with
inconsistent peer vlan id 1 on GigabitEthernet3/36 VLAN39.
019115: Mar 12
03:27:11.612 UTC: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet3/36
on MST0. Inconsistent local vlan.

interface GigabitEthernet3/36
 switchport
trunk native vlan 39
 switchport trunk allowed vlan 64
 switchport mode trunk
 logging event link-status
 logging event trunk-status
 spanning-tree guard
root
end

Could it be possible that the other end has a non-cisco switch with
a different native vlan configured?

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Received on Mon Mar 11 2013 - 21:32:16 ART