Spanning tree BPDU error (SPANTREE-2-RX_BLKPORTPVID)

[kaushal]

Hi All,

I am getting this error on our Cisco 5500 switch. Can someone tell me what it means

2012 Sep 13 14:49:37 PDT -07:00 %SPANTREE-2-RX_1QNONTRUNK: Rcved 1Q-BPDU on non-trunk port 3/20 vlan 72

2012 Sep 13 14:49:37 PDT -07:00 %SPANTREE-2-RX_1QPVIDERR: Rcved pvid_inc BPDU on 1Q port 3/20 vlan 72

2012 Sep 13 14:49:37 PDT -07:00 %SPANTREE-2-RX_BLKPORTPVID: Block 3/20 on rcving vlan 72 for inc peer vlan 235

2012 Sep 13 14:49:37 PDT -07:00 %SPANTREE-2-PORTUNBLK: Unblock previously inc port 3/20 on VLAN 72

I will appreciate any input!!

[get_rthym]

Can u Plz post your network layout?

Seems problem resolved on its own as per last log.

Sent from Cisco Technical Support iPhone App

[kaushal]

I am unable to type or do anything here as these errors constantly keep on appearing on the console. This is a 5505 catalyst switch currently in the VST environment. What sort of info are you looking for? Thanks!!

[get_rthym]

What is port 3/20 used for? is it trunk port or access port.

If its trunk then

Possible causes might be 1. trunking protocol mismatch.

2. native vlan mismatch

IF its access port, then its getting bpdu with trunked vlan, so check equipment connected to 3/20.

As for now..you can unplug port 3/20 and start troubleshooting.

look for equipments connected on the other side of port 3/20.

What stp it's running...spanning has to same on all switches..mst..rstp or pvst etc.

lek