I have a problem running a host server communication over a Cat45k:
If the server and host are connected over the Cat45k the application transports data at 15kB/s - if I connect the server and host over a Cat3750 - there are no problems!
I sniffed the traffic and see in both cases a lot (and I mean really a lot) of TCP DUP ACK's (Application running over TCP 6109).
First I tought the problem must be that the Cat45k don't support jumbo-frames - But in my sniff-trace I do not see any ethernet frames bigger than 1480B.
Does anybody have an idea?
The issue occuers only if I use the 45k as the switch - it works fine with a Cat3750.