Note sure if I am putting this query in the right location, so sorry in advance.
I have four c2350 switches and for some reason two of them didn't seem to like to respond to SNMP request from our monitoring software (Cacti). So I did some testing on it and I boiled it down to the switches didn't seem to want to respond to UDP traffic. However with some debugs I saw that they did recieve the traffic, just never responded to it. One of the switches is not yet in production and I ended up doing a reload on it and it started to work. However, the other one is in production and I can't reload it till a maintaince window. That's fine but I was wondering if anyone else had this problem, what causes it, and if there is a way to fix it with out reloading the switch. Any insite would be helpful.
Below is the UDP debug for a simple SNMP request for the switches uptime via Peassler SNMP Tester. As you can see Switch 1 responds to the UDP traffic it recieves but Switch 2 does not. All other UDP traffic seems to be the same way, I'll have rcvd/sent traffic on Switch 1 and only rcvd on Switch 2.
Switch 1 (Working):
Dec 10 16:04:40.470: UDP: rcvd src=10.10.8.13(41376), dst=10.20.0.238(161), length=49
Dec 10 16:04:40.470: UDP: sent src=10.20.0.238(161), dst=10.10.8.13(41376), length=52
Dec 10 16:04:40.479: UDP: rcvd src=10.10.8.13(41377), dst=10.20.0.238(161), length=49
Dec 10 16:04:40.479: UDP: sent src=10.20.0.238(161), dst=10.10.8.13(41377), length=52
Switch 2 (Not working):
Dec 10 16:04:15.841: UDP: rcvd src=10.10.8.13(41315), dst=10.20.0.237(161), length=49
Dec 10 16:04:20.849: UDP: rcvd src=10.10.8.13(41327), dst=10.20.0.237(161), length=49