From: Jonathan V Hays (jhays@jtan.com)
Date: Mon Jun 09 2003 - 17:40:42 GMT-3
I guess the other consideration is that if the Doc CD says you must have
CEF enabled, and you do not enable during the CCIE lab, then you might
lose points for omitting it.
> -----Original Message-----
> From: Armand D [mailto:ciscoworks2001@yahoo.com]
> Sent: Monday, June 09, 2003 4:32 PM
> To: Connie Nie; 'Jonathan V Hays'; ccielab@groupstudy.com
> Subject: RE: Question on IP CEF
>
>
> 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/ios12
> 1/121cgcr/
> > 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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