From: Dennis Worth (dennis.worth@gmail.com)
Date: Mon Jul 21 2008 - 22:24:15 ART
Joe,
This is great information!
Thanks,
On Mon, Jul 21, 2008 at 1:01 AM, Joseph Brunner <joe@affirmedsystems.com>
wrote:
> When we enable cef globally, cef is enabled on every interface, just keep
> that in mind...
>
> If you disable cef on an interface "no ip route-cache cef", the fast
> switched path is used, unless a feature is used that causes the process
> path
> be used to forward traffic (fragments, crypto without an accelerator come
> to
> mind), or "no ip route-cache" was also configured. We often do this to be
> able to see traffic with the "debug ip packet" command.
>
> You also disable cef switching by using a feature such as policy routing,
> which forces the fast switch path or the process path depending on the ios
> revision, and the platform.
>
> Also keep in the mind the input interface setting determines if a packet is
> cef switched or otherwise. It can get pretty complex from here on out...
>
> Check out this paper, should clear things up...
>
> "How to Verify Cisco Express Forwarding Switching"
>
>
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_tech_note091
> 86a00801e1e46.shtml<http://www.cisco.com/en/US/products/sw/iosswrel/ps1828/products_tech_note09186a00801e1e46.shtml>
>
> -Joe
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Hash
> Aminu
> Sent: Monday, July 21, 2008 3:39 AM
> To: Cisco certification
> Subject: CEf vs IP route-cache on interfaces
>
> Guys just a quick question, if you have fast switching enabled on interface
> of a router and cef enabled globally what kind of switching will be used by
> the router ..
>
>
>
> TIA
>
>
>
> Hash
>
>
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-- Dennis Worth
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