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confusing error on 4006 with 7.3(1), multiple NICs in server

I am getting the following on a 4006 that is running 7.3(1)

2002 Jul 16 11:56:19 %SYS-4-P2_WARN: 1/Tag 0 on packet from 00:02:b3:a0:f1:a4 port 2/19, but port's native vlan is 1

2002 Jul 16 11:57:24 %SYS-4-P2_WARN: 1/Tag 0 on packet from 00:02:b3:a0:f1:d2 port 2/22, but port's native vlan is 1

Both these ports are connected to different NICs on an NT server running exchange. Both ports are assigned to VLAN1.

Any ideas?

1 REPLY
Cisco Employee

Re: confusing error on 4006 with 7.3(1), multiple NICs in server

This message indicates that an 802.1q tagged packet was received on a non-trunk port. The VLAN derived from the packet's tag is different from the port's native. VLAN. Check to see if the Server NIC is trunk capable and is set to trunk.

Also does the servers send any 802.1P traffic? Cat4000 does not support 802.1p traffic. We don't support 802.1p CoS bits without the 802.1q vlan tag. If just the CoS bits are set, we interpret that as a vlan id of 0, which explains the error message you are seeing. A sniffer trace should throw light

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