I have a stack of 3 2950G-48EI. They are connected using stacking GBICs (WS-G5484). The problem is that the top switch (the one with the uplink to the network) keeps losing connectivity to the 2nd switch. A re-boot seems to fix it (or even re-seating the GBIC, though this tends to be a short-term solution), but I can't figure out what's causing it.
I see no errors, there isn't a huge amount of traffic on them, and I have replaced the GBICs with new ones. Nothing helps.
To add to the confusion, this is an intermittent problem.
I am running ios ver 12.1(22)EA1 on all 3 switches. The uplink is 100 Meg Full Duplex to a Cisco router.
Any help or thoughts would be appreciated.