High CPU on Cisco 6500

[Alcides Miguel]

Hello,

I'm facing a high CPU usage on a c6500 (VS-S720-10G) and can't figure out what is causing this high CPU usage.

#sh proc cpu sor | ex 0.00
CPU utilization for five seconds: 86%/75%; one minute: 91%; five minutes: 91%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
8 9353356 473484 19754 3.27% 0.64% 0.44% 0 Check heaps
628 23185348 7464763 3105 1.91% 1.54% 1.49% 0 OSPF-1 Router
387 18071104 2715719 6654 1.11% 1.31% 1.29% 0 XDR mcast
320 48180604 83801635 574 1.03% 1.12% 1.14% 0 IP Input
629 11277632 6151567 1833 0.87% 0.78% 0.85% 0 BGP Router
299 26748148 20145123 1327 0.31% 0.38% 0.39% 0 Earl NDE Task
314 6026952 3313495 1818 0.31% 0.25% 0.27% 0 CDP Protocol
375 8852976 2620891 3377 0.23% 0.56% 0.55% 0 IP RIB Update
361 2139256 268130 7978 0.23% 0.07% 0.06% 0 QOS Stats Gather
170 51224 4829 10607 0.15% 0.78% 0.83% 0 SNMP ENGINE
39 1648 630 2615 0.15% 0.08% 0.07% 1 SSH Process
601 3032368 1580762 1918 0.15% 0.08% 0.08% 0 DHCPD Receive
50 4443668 965472 4602 0.15% 0.07% 0.07% 0 Per-Second Jobs
11 9630016 4823386 1996 0.07% 0.31% 0.32% 0 ARP Input
420 645516 3007927 214 0.07% 0.07% 0.03% 0 FM core
409 3186592 1411586 2257 0.07% 0.12% 0.13% 0 CEF: IPv4 proces
631 2931700 2646654 1107 0.07% 0.09% 0.11% 0 OSPF-1 Hello
609 970812 2747516 353 0.07% 0.06% 0.07% 0 BGP I/O
166 6480 4748 1364 0.07% 0.08% 0.08% 0 PDU DISPATCHER
322 5991704 14456061 414 0.07% 0.14% 0.17% 0 ADJ resolve proc

This high CPU is causing high RTT and some timeouts. 

Please need help

[pdub206]

Well it does not appear there is a process consuming high CPU when you ran that command.  Is the CPU cycling through periods of high usage and not-so-high usage? Check:

show proc cpu history

Also try reading:

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-6500-series-switches/63992-6k-high-cpu.html

[Alcides Miguel]

Hi Patrick, Thanks for your quickly response.

sh proc cpu his

1111 9999999999999999999999999999999999999999999999990000999999 9999999999999999999999999999999999999999999999990000999999 100 ********************************************************** 90 ********************************************************** 80 ********************************************************** 70 ********************************************************** 60 ********************************************************** 50 ********************************************************** 40 ********************************************************** 30 ********************************************************** 20 ********************************************************** 10 ********************************************************** 0....5....1....1....2....2....3....3....4....4....5....5.... 0 5 0 5 0 5 0 5 0 5 CPU% per second (last 60 seconds) 11 1 1 1 111 11 1 11 1 1 1 0090909999999999098999900098009999999990900990999999990909 0090909999999999097999800096009999999990900990999999990909 100 ############***##* *##*###* ####**######################## 90 #################**########*############################## 80 ###########################*############################## 70 ########################################################## 60 ########################################################## 50 ########################################################## 40 ########################################################## 30 ########################################################## 20 ########################################################## 10 ########################################################## 0....5....1....1....2....2....3....3....4....4....5....5.... 0 5 0 5 0 5 0 5 0 5 CPU% per minute (last 60 minutes) * = maximum CPU% # = average CPU% 11111 111111111111111111111111111111 1111111 11 11 11 11 0000099900000000000000000000000000000090000000900989899900999990090088 0000099900000000000000000000000000000090000000900461954100020860090041 100 ###***********######***#************************* * ** ******# 90 #########################***************##*****#*****************### 80 ###########################*#*##*#*****###*######**************#*###** 70 #####################################**##########*******##****##*###** 60 ##########################################################*#########** 50 ###################################################################### 40 ###################################################################### 30 ###################################################################### 20 ###################################################################### 10 ###################################################################### 0....5....1....1....2....2....3....3....4....4....5....5....6....6....7. 0 5 0 5 0 5 0 5 0 5 0 5 0 CPU% per hour (last 72 hours) * = maximum CPU% # = average CPU%

I've done almost everything and can't find where this high cpu usage is coming from