On Thu, 2009-04-23 at 13:51 -0400, Chris Lane wrote: > Having a high cpu with my 3750 not in stack. sh proc cpu | exclude 0.00 > CPU utilization for five seconds: 68%/43%; one minute: 69%; five minutes: > 70% > PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process > 168 40336940 92166921 437 15.49% 15.76% 15.97% 0 IP Input > > WS-C3750-48TS 12.2(35)SE2 C3750-ADVIPSERVICESK > > According to some old threads this was a bug in some older IOS which was > fixed in 12.2(25) > > Egress port is quiet: > 5 minute input rate 11171000 bits/sec, 1353 packets/sec > 5 minute output rate 2821000 bits/sec, 681 packets/sec > > Sure i can upgrade IOS! > Looking to know WHY this box is so hot!
When you see the box spending processor time in "IP Input" it's because it cannot hardware switch the traffic it moves. This is (almost) always a bad thing when you're looking at a L3 switch. There can be several reasons for this. Features not supported in hardware (= most features, e.g. GRE or NAT) is one possible thing. TCAM starvation/overflow could also make the box do software switching. It depends on your configuration. Has it always done this? Regards, Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
