High CPU utilization on Cisco 4507 configured as HSRP Active/Stanby

[nabeelcse07]

Hi Everyone,

Currently, I am working on a project where I have 2 Cisco 4507 acting as Active and Standby. HSRP is configured among them.

I am observing High CPU Utilization on the Standby Core Switch as well as on the Active. But on the Standby its almost 99%. 

When I checked the output of command

Show Processes CPU detailed process iosd sorted 

I found that IP input is around 60%. We are using CCTV system and all of its Multicast streams are routed to these Core Switches. These core switches have been configured as RP as well for PIM Sparse Mode.

I need suggestions how to troubleshoot this.

Regards,

NA

[Reza Sharifi]

Hi,

Have a look at this link and looks for tips on how to troubleshoot it.

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/65591-cat4500-high-cpu.html

HTH

[nabeelcse07]

Hi Reza, Thank you for your kind reply. Actually I had opened a TAC case with Cisco and upon applying the following commands:

debug platform packet all receive buffer

show platform cpu packet buffered

we found that core Switch 2 is receiving huge amount of traffic from the interface Te4/1 which is connecting it to Core Switch 1. In core switch 2, under command Show int vlan 177 we found that input queue is showing as below

input queue: 65/75/0/0 (size/max/drops/flushes)

any suggestions on how to troubleshoot this thing.

Regards,

NA