pvid inconsistent on trunk port

[carl_townshend]

Hi all

Today I connected my cisco IE3000 switch to my 2960, I created a trunk port, and allowed 3 vlans on them. However on both sides I was seeing the port being blocked saying the below, however the vlans were on both switches, any ideas why I would get the below?

%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on FastEthernet0/18 VLAN99.

Jul 21 15:00:46.693: %SPANTREE-2-BLOCK_PVID_PEER: Blocking FastEthernet0/18 on VLAN0001. Inconsistent peer vlan.

Jul 21 15:00:46.693: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/18 on VLAN0099. Inconsistent local vlan.

Jul 21 15:01:26.992: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking FastEthernet0/18 on VLAN0001. Port consistency restored.

Jul 21 15:01:26.992: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking FastEthernet0/18 on VLAN0099. Port consistency restored.

Jul 21 15:03:37.727: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on FastEthernet0/18 VLAN99.

Jul 21 15:03:37.727: %SPANTREE-2-BLOCK_PVID_PEER: Blocking FastEthernet0/18 on VLAN0001. Inconsistent peer vlan.

Jul 21 15:03:37.727: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/18 on VLAN0099. Inconsistent local vlan.

%SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on FastEthernet0/18 VLAN99.
Jul 21 15:00:46.693: %SPANTREE-2-BLOCK_PVID_PEER: Blocking FastEthernet0/18 on VLAN0001. Inconsistent peer vlan.
Jul 21 15:00:46.693: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/18 on VLAN0099. Inconsistent local vlan.
Jul 21 15:01:26.992: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking FastEthernet0/18 on VLAN0001. Port consistency restored.
Jul 21 15:01:26.992: %SPANTREE-2-UNBLOCK_CONSIST_PORT: Unblocking FastEthernet0/18 on VLAN0099. Port consistency restored.
Jul 21 15:03:37.727: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 1 on FastEthernet0/18 VLAN99.
Jul 21 15:03:37.727: %SPANTREE-2-BLOCK_PVID_PEER: Blocking FastEthernet0/18 on VLAN0001. Inconsistent peer vlan.
Jul 21 15:03:37.727: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking FastEthernet0/18 on VLAN0099. Inconsistent local vlan.

[glen.grant]

  That usually means the trunking configs on both sides are not configured exactly the same  and it tears down the trunk.

[carl_townshend]

Hi there

I checked both sides and they were correct, how could this be?

[manju.cisco]

Hi Carl,

You have inconsistent native vlan configured on both end of the link.

On this switch you have a commad probably "switchport trunk native vlan 99" and on other switch you may not have this command.

SO here, the native vlan on this switch is 99 and at other end its 1. Hence this mismatch.

If you can configure command "switchprot trunk native vlan 99" on other switch then this issue will be resolved.

Thanks,

Manjunath

Pls vote useful answers.

[manju.cisco]

Carl, can you pls send us both trunk links configurations ? you might    not have configured "switchprot trunk native vlan 99" on one of the    trunk port.

[svansteensel]

Hi Carl,

Are you using RSAPN?

Most likely you are hitting this bug CSCtj76880 here on the 3750 switch... this is seen version 12.2(55)SE... and a fix to this would be available in the versio 12.2(58)SE...

And all of them indicates that you are hitting this bug... when you say it works with the following configuration changes...

1. you disable RSPAN session.

2. when you use ISL instead of dot1q

3. making the switch2 as root where you have configured the RSPAN....

Regards Sebastian