cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
Announcements

Cisco Community Designated VIP Class of 2020

345
Views
0
Helpful
1
Replies
Collaborator

cat6k responds much slower to one SNMP RO string than another

Not sure what to make of this, but I'm running into a 6509 that takes >90s to respond to queries from the Nagios check_ifstatus plugin
when a particular SNMP RO string is used. It responds "normally" (within a few secs) if an alternate RO string is substituted in. Both strings are configured identically, according to the network staff. I don't have access to the full configs. I can't think of what might cause this kind of behavior. Any ideas on what to check for are much appreciated.

1 REPLY 1
Highlighted
Hall of Fame Cisco Employee

Re: cat6k responds much slower to one SNMP RO string than anothe

This does sound strange, and it's not something I've heard before.  I would have to think that either there is some difference in the SNMP configuration (views applied, ACL, etc.) or perhaps the problematic string contains a '@' and the switch is evaluating it with community string indexing rules.

Before any kind of troubleshooting can begin, you'd need to get the show ver and show run.  It may also be helpful to get a sniffer trace just to see if anything on the network might be throttling SNMP responses based on community string (would be strange, but you never know).  Seeing the switch's CPU utilization at each poll would be helpful, too.  Perhaps it's coincidental that one string appears to take longer than another.  Perhaps something else is happening on the switch that is driving up CPU utilization at the same time.

CreatePlease to create content
Content for Community-Ad
July's Community Spotlight Awards