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killabee
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What else to monitor

Sun Oct 30, 2011 3:48 pm

Other than the following items, what else do you monitor or watch out for on your routers/switchs?

- Interface status (up/down)
- Interface errors/discards
- Interface utilization
- CPU utilization
- Hardware status (fan, PSU, etc)
- Syslogs
- Config changes

Should you monitor memory usage? This would seem odd since you'd need a good understanding of memory allocation in IOS.

Some other things I had in mind (though I'm not sure if you can monitor them):
- HSRP active router (where applicable)
- Default route (in cases of default route being received from BGP neighbor)
- BGP preferred path

Thanks

javentre
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Re: What else to monitor

Sun Oct 30, 2011 4:18 pm

killabee wrote:Should you monitor memory usage?
Yes, how else do you track memory leaks?

I may not care that I have X amount free, but I care that it's been losing about X MB / day since the last upgrade.
http://networking.ventrefamily.com

killabee
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Re: What else to monitor

Sun Oct 30, 2011 5:00 pm

javentre wrote:Yes, how else do you track memory leaks?

I may not care that I have X amount free, but I care that it's been losing about X MB / day since the last upgrade.


Good point. Thanks

jb1028
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Re: What else to monitor

Sun Oct 30, 2011 10:59 pm

Buffer misses are useful when trying to determine packet loss. Depending on your config, others could also be useful like aaa_server, bfd, ipmulticast, nhrp, event-manager (if you using eem), ipsec, ect. You can also use tcl or eem to write rfc 2891 (event mib) which can monitor any value that you can see through a show command. I use it often for monitoring cisco ISG subscribers.

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