07-01-2010 09:16 AM - edited 03-06-2019 11:52 AM
I know that when using PBR the deny entries in an ACL are processed by the CPU and it can affect the performance of the switch.
Does anyone have a good document that pertains to what can affect CPU utilization?
I’m in the process of designing a complex access control list with many permits and deny entries and if this platform can’t handle such tasks without overloading the CPU I can use another solution as an alternative.
Thanks a bunch.
Regards,
Juan
07-01-2010 09:34 AM
Hi
Any process that run in router use its CPU. If you are facing High CPU issue you need to check the process that run in CPU & need to Diagnose them
For Example :
ARP Input—ARP Input section of the document Troubleshooting High CPU Utilization Due to Processes
BGP Router—High CPU due to BGP Router Process section of the document Troubleshooting High CPU Caused by the BGP Scanner or BGP Router Process
BGP Scanner—High CPU due to BGP Scanner section of the document Troubleshooting High CPU Caused by the BGP Scanner or BGP Router Process
EXEC—High CPU Utilization in the EXEC and Virtual EXEC Processes
HyBridge Input—Troubleshooting High CPU Utilization Caused by the HyBridge Input Process on Routers With ATM Interfaces
IP Input—Troubleshooting High CPU Utilization Due to the IP Input Process
IP Simple Network Management Protocol (SNMP)—IP Simple Network Management Protocol (SNMP) Causes High CPU Utilization
LC ADJ Updater—What Causes High CPU Utilization in the LC Adjacency Updater Process on a Cisco 12000 Series Internet Router?
TCP Timer—TCP Timer section of the document Troubleshooting High CPU Utilization due to Processes
TTY Background—TTY Background section of the document Troubleshooting High CPU Utilization due to Processes
Virtual EXEC—High CPU Utilization in Exec and Virtual Exec Processes
Vtemplate Backgr—Virtual Template Background section of the document Troubleshooting High CPU Utilization due to Processes
Other processes—Other Processes
Please refer the below link
http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a00800a70f2.shtml
Regards
Chetan Kumar
07-01-2010 11:00 PM
I know that when using PBR the deny entries in an ACL are processed by the CPU and it can affect the performance of the switch.
Does anyone have a good document that pertains to what can affect CPU utilization?
I’m in the process of designing a complex access control list with many permits and deny entries and if this platform can’t handle such tasks without overloading the CPU I can use another solution as an alternative.
Thanks a bunch.
Regards,
Juan
Hi Juan,
Check out the below link on troubleshooting on high CPU on 2900 and 3500 series switches which can help you to find the process which can affect the cpu of the switches.
http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a0080094e78.shtml
Hope to Help !!
Ganesh.H
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