Our environment consistts of mostly 3560 and 2950 switches. The 3560's went in with a new Cisco IP phone system last summer.
yesterday I noticed some phone starting to reset, like you unplugged the power and plugged them back in. More starting doing this and then I foinf a Giga port in my MF that shut off, then another and another...only on the 2950 switches.
Everything was fine overnight, and it started again today. Phones resetting and ports shutting off. The ports shut off do to a loopback detection. I dsiabled the shutdown of the port to keep the network up, but the phones keep resettin randomly and I have little hiccups in the network, just long enough for Outlook to complain.
I am at a loss, any suggestions?