From: dusty (dushoan@yahoo.com)
Date: Tue Feb 20 2007 - 12:04:56 ART
when you enable policy base routing, all the layer-3 packets need to go to the CPU for routing processing (process switching) so you will need to disable cache switching (cef and fast switching). fast switching and cef forward packet base on FIB and adjacent table which include layer-2 header. only the first packet of fast and cef switching is process switching.
hope this help. dusty
Ivan Ivanov <ivanov.ivan@gmail.com> wrote:
Hello,
I am not sure that you should disable cef for PBR, most possibly not.
Cef should be disabled, when you want to see the packets passing
through the router with "debug ip packet".
There are many things that don't work without cef, like Unicast
Reverse Path Forwarding like MPLS/ldp and other
This is from me :)
On 2/20/07, Richard Dumoulin wrote:
> Never unless you hit a bug.
> Where did you get that you need to disable cef for PBR?
>
> Regards
>
> -- Richard
>
> -----Message d'origine-----
> De : nobody@groupstudy.com [mailto:nobody@groupstudy.com]
> Envoyi : Tuesday, February 20, 2007 2:04 PM
> @ : ccielab@groupstudy.com
> Objet : Traffic engineering question
>
> When I configure routing policy on interface as follows:
>
> inter fa0/0
> ip policy route-map MAP
> command "no ip route-cache cef" is required.
> Could someone tell me : Which kind of situation I need disable route-cache cef"
> Thanks
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
> **********************************************************************
> Any opinions expressed in the email are those of the individual and not necessarily the company. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering it to the intended recipient, be advised that you have received this email in error and that any dissemination, distribution, copying or use is strictly prohibited.
>
> If you have received this email in error, or if you are concerned with the content of this email please e-mail to: e-security.support@vanco.info
>
> The contents of an attachment to this e-mail may contain software viruses which could damage your own computer system. While the sender has taken every reasonable precaution to minimise this risk, we cannot accept liability for any damage which you sustain as a result of software viruses. You should carry out your own virus checks before opening any attachments to this e-mail.
>
> Vanco UK Ltd Registered in England No: 2296733 Registered Office: John Busch House, 277 London Road, Isleworth, Middlesex TW7 5AX
> **********************************************************************
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
-- Best Regards!Ivan Ivanov
This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:47 ART