cpu 4500

[Robo123]

Hi Team,

I have cisco 'WS-C4500X-32'  chassi running with "cat4500e-universalk9.SPA.03.08.01.E.152-4.E1.bin" where i observed CPU spike for some time.

Switch>sh processes cpu sorted | ex 0.0
Core 0: CPU utilization for five seconds: 75%; one minute: 73%; five minutes: 70%
Core 1: CPU utilization for five seconds: 73%; one minute: 77%; five minutes: 74%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
5032 4255823 39714608 259 39.98 39.84 37.14 0 licensed
5079 2381520 26893411 442 32.27 33.56 33.16 0 iosd
5034 872261 15334999 781 2.00 1.48 1.50 0 ffm

also found one interface carried load.

TenGigabitEthernet1/1 is up, line protocol is up (connected)
Hardware is Ten Gigabit Ethernet Port, address is 0462.7330.5d3f (bia 0462.7330.5d3f)
Description: <**** Conn. to aother switch ****>
Internet address is <Ip address>
MTU 1500 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 11/255, rxload 17/255

Please help me to find the root cause.

[Robo123]

can any one explain what is "licensed" process indicating.Possible share the cisco doc for the same.

[sbhadrav@cisco.com]

A Cisco Catalyst 4506 Switch was showing high CPU load every 10 minutes.

A reload helped work around the issue, but high CPU was observed every 10 minutes. So sporadically, the high CPU load was seen.
Analyzing SHOW TECH showed that the CPU load always stayed at 100%.

In order to troubleshoot the issue the following commands were executed:

show platform CPU statistics

show process cpu | excl 0.0

show platform health

show spanning-tree summary

The control traffic counters were high in numbers and the K2CPUMan review process which was responsible for handling system CPU stayed at 30%.

The customer had also reported that all the IP Phones were going out of service.

During the sniffer capture, it was found that the one MAC address, which belonged to a 3Com switch was causing the STP loop. We shut down the port and the CPU load dropped to 25% from 100%.

Removing the 3Com switch from the network had resolved the issue.

After the issue disappeared, we connected an IP Phone that was in use on the 3Com switch to the suspect port and monitored it for a few hours with no further high CPU load being noticed.

For information that helps to understand high CPU load for Catalyst 4500 switches, see the document titled High CPU Utilization on Cisco IOS Software-Based Catalyst 4500 Switches. Click here to view "High CPU Utilization on Cisco IOS Software-Based Catalyst 4500 Switches" (http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00804cef15.shtml)