[c-nsp] CEF Scanner eating CPU in Supervisor 720

[Peter Salanki]

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Hello,

Process "CEF Scanner" is eating average 60% of the CPU on one of my  
Sup720-3BXL. This leads to snmp responses being delayed and full BGP  
updates taking a long time. I have not seen this on any of my other  
sup720s. What differs this box from the rest is that this one has a  
lot of directly connected hosts ~10 SVIs with 300 hosts each (on /23  
subnets). I have tried setting arp timeout to 1200 on those SVIs,  
which resulted in a small CPU utilization decrease. What can I do to  
calm down the CEF Scanner? I'm running 12.2(18)SXF4.

CPU utilization for five seconds: 44%/4%; one minute: 38%; five  
minutes: 38%
PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
119   103495040    719635     143819 35.40% 23.87% 21.54%   0 CEF  
Scanner

Sincerely

Peter Salanki
Chief Network Engineer
Bahnhof AB (AS8473)
www.bahnhof.se
Office: +46855577132
Cell: +46709174932


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