[c-nsp] High CPU Usage

[Ian MacKinnon]

I haven't used a 2600 for a while, but I seem to remember they don't have a lot of grunt.

Your sh proc cpu shows 61% interrupt, there is a good guide for tracking down causes on the Cisco site somewhere <fx: googles) http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml


Check your interfaces for promiscuous mode, as that means every packet generates an interrupt.

Don't know if your IPSEC will be generating an interrupt when a packet hits the outgoing interface in order to do the encapsulation.

Ian



-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Jeremy Parr
Sent: 14 July 2009 15:43
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] High CPU Usage

I have a 2600 doing some GRE tunnel aggregation with IPSEC and a
AIM-VPN. The CPU is consistently at 95%+, but none of the running
processes are using nearly that much CPU. Is there some other place I
should be looking?

#sh processes cpu sorted
CPU utilization for five seconds: 99%/61%; one minute: 99%; five minutes: 98%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
  70   163085876  24727077       6595 15.31% 16.49% 14.22%   0 IP Input
 146    42276796   9771758       4326  8.24%  8.66%  7.46%   0 Crypto Support
 169    38417520   7286822       5272  5.22%  4.94%  5.12%   0 Crypto PAS Proc
   6    21018268   2714504       7742  4.05%  4.99%  4.24%   0 Pool Manager
  54       65680      2206      29773  2.20%  0.71%  1.20%  66 SSH Process
 190     5281352   6682003        790  0.48%  0.47%  0.45%   0 IP-EIGRP: HELLO
 121     1163120   7759419        149  0.24%  0.16%  0.13%   0 RBSCP Background
  95      709328   1161174        610  0.16%  0.07%  0.06%   0 CEF process
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