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Flaky 2950 switches

We have a regional office with two WS-C2950G-48-EI switches, both close to fully populated. Periodically, at a frequency of 1-2 weeks, all workstations in one or the other switch (but not both at the same time) will lose all connectivity to the network. There are no obvious problems with the switch, which remains powered on. The only (easy) way to re-establish connectivity is to power-cycle the switch.

This location is on a serious UPS system, and we think it's not power-related, since the 2621 router that's in the same rack and on the same circuit has been up with no problems for about 2 1/2 years. We've had a consulting electrician look at grounding and phase problems, and he found none. We thought of a possible problem in the Cat5 plant, but the problem occurs randomly in one or the other switch, not consistently in one of them.

Given that this is a remote location with no qualified IT staff, can anyone offer a suggestion for next troubleshooting steps?

Edit: sorry, meant to post in LAN section. My bad. I'll put the message there and you can ignore it here.


Re: Flaky 2950 switches

There are a few areas to look at:

1)Are any of te swithes being overworked. Check the Processes of the CPU.

2) Can this be a spanning tree reconvergence issue.Who is the Root Bridge of your network.

3)If their are mant ports with speed and duplex issue, the switch may be overwelmed by errors and may possibly reset itself periodically.

4) Check the logs for any errors on both switches. That may lead you to look in the area that is causing the problem.....

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