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The Dude causes high CPU usage on routers

Posted: Fri Apr 05, 2013 3:46 pm
by jbaird
Several routers running 5.21-5.24 (RB450G) here. After adding the device to The Dude via SNMP, the CPU usage on all of these routers goes to 99-100%. The profiler tool on the routers says the usage is attributed to the "Management" process which I am assuming is SNMP.

Has anyone noticed this? Any fix?

Thanks.

Re: The Dude causes high CPU usage on routers

Posted: Fri Apr 05, 2013 5:42 pm
by lebowski
On devices with large routing tables you need to tell the device to not respond to SNMP queries for routing tables.

I am on Cisco so I can't give you the command and I don't know if one exists. The commands for Cisco are like...

snmp-server view cutdown iso included
snmp-server view cutdown at excluded
snmp-server view cutdown internet.6.3.15 excluded
snmp-server view cutdown internet.6.3.16 excluded
snmp-server view cutdown internet.6.3.18 excluded
snmp-server view cutdown ip.21 excluded
snmp-server view cutdown ip.22 excluded

I have put these on my BGP internet connected routers to lower SNMP walk CPU.

HTH,
Lebowski

Re: The Dude causes high CPU usage on routers

Posted: Fri Apr 05, 2013 5:54 pm
by jbaird
That does make sense, but these routers do not have large routing tables.