Packet size is determined by the sending device. I am assuming in this case it is a workstation. Routers or firewalls do not determine the MTU size used in a conversation. Packet size is determined above layer 3.This is more than likely a PC issue. I...

I have just finished upgrading 1,060 3550's. I would greatly stress that you do not delete the old image file if at all possible. You run the risk of a corrupted IOS file or something of that nature and it takes forever to upload a new IOS via a cons...

If they are actually getting a clock counting down to the disconnect then this is a Citrix function. Would suggest your Citrix admins take a look at this.

We look for the duplicate IP address message in the logs. Trace down the MAC that shows up in these messages and that usually is the switch that started the issue. Sometimes it is the actual server MAC that shows up.