check_ifoperstatus & cisco 2620

[Robert Bilbrey]

I have an oddity that I don't understand and hope that someone knows the 
answer. I have several routers that I use check_ifoperstatus  on. On two 
of them the router will stop responding to snmp requests on one 
interface, but will respond to snmp polling on the another interface. ie 
initially set to poll the serial interface, life is good and everything 
is green. A week goes by and Nagios starts squawking. Doing an snmpwalk 
from the command line, the serial interface times out, but the Ethernet 
interface does not. Switch the interfaces in Nagios and everything is 
back to green. A week later Nagios is squawking again. Do another 
snmpwalk. Serial responds but Ethernet does not.  Does anyone know what 
is going on here and how to fix it?
Thanks, Bob


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