From: Armand D (ciscoworks2001@yahoo.com)
Date: Mon Jun 09 2003 - 17:31:38 GMT-3
I'm not sure about a golden rule....but you definitely
don't need CEF to run CAR. I only use CEF on routers
with high amount of IP traffic/tables.
HTH,
Armand
http://www.cisco.com/warp/public/63/tuning.html#cisco_xpres
--- Connie Nie <CNie@EPLUS.com> wrote: > I agree. I
was in Netmaster class earlier and we
> configured and tested CAR
> without enabling CEF.
>
> Connie
>
>
> -----Original Message-----
> From: Jonathan V Hays [mailto:jhays@jtan.com]
> Sent: Saturday, June 07, 2003 10:11 PM
> To: ccielab@groupstudy.com
> Subject: RE: Question on IP CEF
>
> Does CAR require CEF for *all* routers, or only
> VIP-enabled routers,
> such as the 7500 series?
>
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/
> qos_r/qrdcmd4.htm#1037428
>
> The above link states:
>
> "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."
> ---
> I question the veracity of the above statement for
> two reasons.
>
> 1. I have come across statements in older books and
> documentation that
> say CEF is only needed for CAR on high-end routers
> with VIP cards.
>
> 2.I notice that I can enable CAR without CEF on
> low-end routers in a lab
> and the IOS does not complain. However, without any
> traffic to test,
> it's hard to tell if it's really working
>
> Is there anyone with real-world experience who can
> shed some light on
> this?
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On
> > Behalf Of phase90
> > Sent: Saturday, June 07, 2003 7:20 PM
> > To: Shahid Shafi; 'Connie Nie';
> ccielab@groupstudy.com
> > Subject: Re: Question on IP CEF
> >
> >
> > Committed-Access-Rate [ CAR ] needs CEF also.
> >
> >
> > Jerry
> > ----- Original Message -----
> > From: "Shahid Shafi" <sshafi@qualcomm.com>
> > To: "'Connie Nie'" <CNie@eplus.com>;
> <ccielab@groupstudy.com>
> > Sent: Saturday, June 07, 2003 5:31 PM
> > Subject: RE: Question on IP CEF
> >
> >
> > > netflow
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com
> > [mailto:nobody@groupstudy.com]On Behalf Of
> > > Connie Nie
> > >
> > Sent: Saturday, June 07, 2003 8:10 AM
> > > To: ccielab@groupstudy.com
> > > Subject: RE: Question on IP CEF
> > >
> > >
> > > I have been wondering about the same thing. I
> have been
> > noting down the
> > > features that need CEF enabled, so far I have
> two
> > >
> > > NBAR
> > > IP Unicast RPF
> > >
> > > Anyone has anything else to add onto the list?
> > >
> > > Connie
> > > -----Original Message-----
> > > From: Ronald van Dommelen
> [mailto:Ronald.v.Dommelen@Nobel.NL]
> > > Sent: Saturday, June 07, 2003 7:33 AM
> > > To: ccielab@groupstudy.com
> > > Subject: Question on IP CEF
> > >
> > > Hi all,
> > >
> > > I was wondering if their is a 'golden rule' when
> to use the 'ip cef'
> > command
> > > ?
> > >
> > > Thanks
> > >
> > > Ronald v Dommelen
> > > The Netherlands
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