[nsp] RPF on Catalyst 6k

[Me]

Does this limitation apply to the 7600 series as well?

On Thu, 26 Dec 2002, 
Rubens Kuhl Jr. wrote:

> Date: Thu, 26 Dec 2002 15:00:00 -0200
> From: Rubens Kuhl Jr. <rkjnsp@ieg.com.br>
> To: efrat and uri <efrat_uri@hotmail.com>, cisco-nsp@puck.nether.net
> Subject: Re: [nsp] RPF on Catalyst 6k
> 
> 
> Because of performance on a wire-speed device, all checkings must be done in
> parallel. If the CEF table were stored at only one place, it would require 2
> lookups to fetch the destination and verify RPF. As far as I know, it's an
> identical copy.
> 
> 
> Rubens Kuhl Jr.
> 
> 
> 
> ----- Original Message -----
> From: "efrat and uri" <efrat_uri@hotmail.com>
> To: <cisco-nsp@puck.nether.net>
> Sent: Wednesday, December 25, 2002 6:47 AM
> Subject: [nsp] RPF on Catalyst 6k
> 
> 
> | Hi,
> | As I understand form Cisco doc. The 6K can hold 256K entries of IPv4 CIDR
> in
> | 2 TCAM. This is the CEF.
> | How much does a CIDR entry takes? one TCAM row - 64 bits /32 bits
> |
> | If the RPF is enabled the capacity is reduced by half.
> | Do you know why?
> | Does the CEF structure actually changes?
> | Is it because of performance?
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp@puck.nether.net
> http://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
> 

-- 
-sean
Spoon!