Port stopped communication

[alialjamri2008]

Any body can help identifying what was the problem with this switch, and what has to be done to overcome this:

%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on GigabitEthernet0/1 VLAN902.

%SPANTREE-2-BLOCK_PVID_PEER: Blocking GigabitEthernet0/1 on VLAN0001. Inconsistent peer vlan.

%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet0/1 on VLAN0902. Inconsistent local vlan.

%LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to administratively down

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down

%LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up

%SYS-5-CONFIG_I: Configured from console by Meh on vty0 (10.22.36.164)

%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on GigabitEthernet0/1 VLAN902.

%SPANTREE-2-BLOCK_PVID_PEER: Blocking GigabitEthernet0/1 on VLAN0001. Inconsistent peer vlan.

%SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet0/1 on VLAN0902. Inconsistent local vlan.

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up

%SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking GigabitEthernet0/1 on VLAN0001. Port consistency restored.

%SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking GigabitEthernet0/1 on VLAN0902. Port consistency restored.

I just shutdown and unshutdown the port to resolve this problem.

Thanks

Ali

[Vivek Ganapathi]

Well, Looks to me like the native VLAN ID's are configured differently on interfaces. It has been to same at both ends of the trunk interface. Have a look at it. Hopefully, should fix up. Do let me know.

If it helped, please do rate.

Thanks

Vivek

[alialjamri2008]

Thanks Vivek,
I noticed that this happened only once when the other switch moved to this new location and powered on,
following are the two error message from the two switchs:
SW1
%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 902 on GigabitEthernet0/1 VLAN1.
SW2
%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on GigabitEthernet0/1 VLAN902.

But both vlan 1 are shutdown, and both native vlan are default to vlan 1:
SW1
LAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/1,

SW2
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi0/1

SW1 G0/1 is trunk connected to SW2 G0/1 trunk port.

Thanks,
Ali

[viswamin]

can you please eloborate on the setup that you have ?

If my understanding is correct you are plugging a Switch to an already existing switch on the network. and the error messages complain about the mismatch vlan's.

can you share the interface configurations of both the switches on which you connect. that helps to undersatnd the issu better.

-Vijay

[alialjamri2008]

Vijay below are the configurations:

SW1_C3560
interface GigabitEthernet0/1
description Trunk Port
switchport trunk encapsulation dot1q
switchport mode trunk
end

SW2_C2960
interface GigabitEthernet0/1
description "UPLINK"
switchport mode trunk
end

Thanks

Ali

[Amos Kafwembe]

hi,

I am having almost the exact problem. with me, i have 3 switches connected one after the other using dot1q's call it A,B and C. when i configure vlans on A or B switch C will do exactly as described in the original post. am so stuck! just what is the problem???

[alialjamri2008]

If you can post the Vlan's configuration on each switches, I can tell you if you have same issue or not.

Ali