High CPU issue with ISR 2911 router

[DaeHeon Kang]

Hi,

We've got high CPU issue with ISR 2911 router.

It seems the CPU usage hits high is occurring daily base, possibly during business hours.

I guess this comes from old hardware + throughput restriction.

The detail about router and others is as below.

Can you advise me any clue that possibly could cause this issue?

Model: CISCO2911/K9

IOS version: C2900 Software (C2900-UNIVERSALK9-M), Version 15.5(3)M4a

License:  only Ipbase (not, security, uc and data)

Shaping speed applied to WAN ethernet link: 100Mbps

[marce1000]

 - FYI : https://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/15095-highcpu.html

 M.

[Georg Pauwen]

Hello,

post the running configuration of your 2911 router (sh run)...

[MHM Cisco World]

even if the shaped speed but still if there is any fragment this meaning that the router CPU is use to fragment and defragment the packet.

[DaeHeon Kang]

Following is the out of show proc cpu

XXXXRTR01#show processes cpu sorted | exclude 0.00
CPU utilization for five seconds: 71%/69%; one minute: 72%; five minutes: 71%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
359 3112 177 17581 0.39% 1.16% 0.26% 395 SSH Process
199 23391036 3614931277 0 0.39% 0.42% 0.45% 0 HQF Output Shape
355 12041712 3970723181 0 0.23% 0.23% 0.23% 0 NBAR timer tick
170 153857956 531719398 289 0.23% 0.23% 0.20% 0 IP Input
363 5038012 1459238971 3 0.15% 0.08% 0.08% 0 PIM Process
373 6397160 3314671309 0 0.15% 0.11% 0.13% 0 MFIB_mrib_write
360 5309820 4142671026 0 0.15% 0.15% 0.15% 0 HSRP Common
203 14784456 66595098 222 0.07% 0.07% 0.07% 0 ADJ background
364 1436656 665722940 2 0.07% 0.02% 0.02% 0 Mwheel Process
166 3362224 2072539362 1 0.07% 0.06% 0.07% 0 IPAM Manager
35 26955120 113877699 236 0.07% 0.02% 0.02% 0 ARP Input
356 12441024 65084520 191 0.07% 0.06% 0.07% 0 CFT Timer Proces