We have multiple 3750G switch stacks of 5-6 switches that are getting intermittent packet loss. Our monitoring software reports them as being down once 5 pings to the management interface ellict no responses, yet the switch never goes down and no production impact is reported.
Also when we do have management to these switches, they are very sluggish. An extended ping to the management IP usually results in roughly 5% packet loss during the day even though all successful responses are 1ms.
Bandwidth utilization was the first place I looked and it does not seem to be oversubscribed (total of 6GB uplink on each stack)....But you never know I guess.
CPU utilization is usually 5% and never goes above 10%. There does not seem to be any drops on the interfaces either. No routing is done on the switches (only default gateway configured). No QOS is configured on the switches (but there is some on the core switch but only for routing protocols...).
All switches are the same and all are running version 12.2(20)SE1 and image C3750-I5K91-M.
Please help! I will provide any additional information you request! Thanks!