c2950 unable to transmit frames larger than 1496 bytes

[brooks.donald]

We have 3 c2950g-24 switches trunked together and are having trouble sending frames larger than 1496 bytes. We have the same config as in other sites and this is the only problem site. IOS version is 12.1(19)EA1c. Are there bugs related to trnk links that I could not find? I have opened a TAC case but was curious if others have seen this problem.

[Kevin Dorrell]

What is the trouble, does it drop the frames, or does it simply count giants. If it is just a question of counting giants, this is a cosmetic bug. I cannot remember what number it is, but I have seen it before. I'll try and look it up in my archive.

But if it is dropping the frames, then that is more serious - I've not seen that.

Kevin Dorrell

Luxembourg

[brooks.donald]

It is actually dropping any frames larger than 1496 bytes.

[Prashanth Krishnappa]

With trunk, there is a header overhead. Try increasing system MTU

http://www.cisco.com/warp/public/473/148.html#subtopic1D

[brooks.donald]

we have configured system mtu to 1530 and the problem remains.

[Jagdeep Gambhir]

Can you try reloading the switch.