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Community Member

bad checksum

i am getting the following on my 6509 switch ,please explain for what i am getting it and how i can stop it.

: 2003 Sep 30 21:48:38 %IP-3-TCP_BADCKSUM:TCP bad checksum

2 REPLIES
Community Member

Re: bad checksum

Hi Mr 007!

Cisco error decode:

1. %IP-3-TCP_BADCKSUM:TCP bad checksum

This message indicates that the system has received a TCP packet with a bad checksum from another device on the administrative VLAN. The packet will be dicarded.

Recommended Action: No action is necessary. This message is provided for information only.

Related documents: No specific documents apply to this error message.

Community Member

Re: bad checksum

I've had similar problems with Catalyst 4000 serie. If you have other switches connected to your 6500, you should check if you get any error messages. Furthermore I would check the counters on the interfaces connecting the switches together. Look if you have anything ode like FCS-error for example.

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