A Catalyst 2955c-12 just make me mad.The client complaint that his network management software kept alarm about 4 2955c-12 in his lan. From any device I ping to those concerned devices' management IP address, there are 500 to 600 ms delay, though no lost packets. Those 2955c-12 are all conected to a WS-X4124-FX-MT line card of a catalyst 4510R ,which is the core switch of the lan,through its 100base-FX optical fiber interface .Even I ping from 4510R, there is reply delay. I have no idea what's going wrong. Anyone help?
Thanks in advance.