From: Petr Lapukhov (petrsoft@gmail.com)
Date: Mon Jun 12 2006 - 05:00:23 ART
Thanks Godswill :)
I did'nt check DocCD before answering, so my memory failed me :)
Anyway, I still think that turning CEF on every router is not that bad
idea. As I remember from my lab it has been turned on, when I verified
my "show adjacencies"
Petr
2006/6/12, Godswill Oletu <oletu@inbox.lv>:
>
> Petr,
>
> >
> > AFAIR, CEF is not mandatory for CAR,
> >
>
> Are you sure about that?
>
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/fqcprt1/qcfcar.htm#wp1000872
>
> The above link referenced and I quote in part:
>
> "....CAR and DCAR can be configured on an interface or subinterface.
> However, CAR and DCAR are not supported on the Fast EtherChannel, tunnel,
> or
> PRI interfaces, nor on any interface that does not support Cisco Express
> Forwarding (CEF).
>
> CEF must be enabled on the interface before you configure CAR or
> DCAR......."
>
>
> HTH
> Godswill Oletu
>
>
>
>
>
> ----- Original Message -----
> From: "Petr Lapukhov" <petrsoft@gmail.com>
> To: "Sami" <sy1977@gmail.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Sunday, June 11, 2006 3:43 PM
> Subject: Re: IP CEF
>
>
> > Sami,
> >
> > it wont hurt to enable CEF anytime, if you are NOT explicitly told
> > to disable it :) After all, they have at least 12.3 on every router in
> > the lab now :)
> >
> > AFAIR, CEF is not mandatory for CAR, but it is required for class-based
> > marking and NBAR, to mention a few. Some other CEF-dependant things
> > are related to load-balancing, and BGP policy accounting, for example :)
> >
> > Remember the main point of real lab: you could do anything that is
> > not restricted by the task conditions, as long as you get the result.
> >
> > The biggest problem is to figure WHAT is the required result ;) That is,
> > you need to pay extremal attention to the wording, and ask for
> clarification
> > on every doubtful moment. Next step is to figure how you can verify
> your
> > solution, and the rest is simple :)
> >
> > Oh yes, and if you have more than one alternative, choose the most
> simple
> > one :)
> > The simplest solution is probably always the best.
> >
> > HTH
> > Petr
> >
> > 2006/6/11, Sami <sy1977@gmail.com>:
> > >
> > > Group,
> > >
> > > I am confused when to use IP CEF while doing rate limiting. Is CEF
> > > mandatory for CAR or not ?
> > >
> > > Thanks.
> > >
> > >
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