tcam, qos acl ,security acl and fib

[sarahr202]

Hi everybody!

I have few questions about TCAM.

1) Do switches have seprate tcam for qos acl and security acl? or there is one tcam for both?

2) Do fib uses tcam?

thanks a lot!

[Jon Marshall]

Sarah

1) Depends. For example with a Sup1a on a 6500 QOS and security acl's shared the same TCAM resources.

On supervisors later than that they have their own TCAM resources -

http://www.cisco.com/en/US/products/hw/switches/ps708/products_white_paper09186a00800c9470.shtml#wp43045

2) Not sure what the relation would be here. Is there something specific you were thinking of ?

Jon

[sarahr202]

Thanks for your reply jon!

I was just wondering if fib table uses tcam structure or not. Fib table has nothing to do with tcam.

Thanks a lot!

[Jon Marshall · Accepted solution]

Sorry Sarah, i was thinking of something else !!

Yes the FIB does use TCAM to store it's entries.

Jon