About 8 months ago I upgraded a bunch of our 2950's to 12.1(22)EA4 and ran into performance problems. I was losing telnet/ping connectivity to the switches and users who were connected to them reported performance problems. I opened a TAC call and was told to downgrade for the time being.
I recently upgraded some 2950's to 12.1(22)EA7, and I seem to be running into the same issues again.
I am wondering if this is a performance problem on the feed switches in the closets, they are 2950G-48's, and they feed in some cases 4-5 other 2950G-48's.
No error logs, no errors on the ports at all . . . .
When the problem occurs I see very little traffic at all, as for what type it is, I do not know. I can do some packet captures. My guess off the top of my head would be a mix of TCP/IP and Appletalk, probably very little of the latter.
The 2940's Fast Ethernet port does not transmit frames.
The exact conditions that trigger this problem in the customer environment are not known.
The transmit lockups have been reported to occur in most cases on ports operating at speed 10 and duplex half.
The transmit (Tx) lockups can be recreated in the lab when there is a rapid increase in the rate of change of traffic transmitted by the 2940 switch. The Tx lockups are reproducible in the lab for all speed and duplex combinations but the Tx lockups
are very difficult to reproduce on ports operating at speed 100 and duplex full.
Move the device to a different port on the switch as a temporary workaround.
Software reload or power cycle of 2940 to clear the transmit lockup.
Though it is for 2940, but it may affect the 2950 hardware as well, I would suggest you to lower down the version of IOS and not to go the latest and greates versions before cisco identifies the bugs in it.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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