From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Jul 15 2004 - 18:40:42 GMT-3
The answer is it depends. The behavior of policy routing
locally generated traffic has changed in recent versions. It used to be
that you could policy route locally generated broadcasts and multicasts,
but they changed it so you can't.
I don't really see why you would want to in a practical
application, but I have seen many times where it has undesired effects,
which is probably why they changed it. For example you could be policy
routing your routing protocol traffic out a different interface and the
"debug ip packet" output would show that it's going out the correct
interface.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Terrence Rouse (trouse)
> Sent: Thursday, July 15, 2004 12:10 PM
> To: 'Scott Savage'; ccielab@groupstudy.com
> Subject: RE: PBR w/ MULTICAST and BROADCAST
>
> Thanks I was thinking that also. But my REAL question was can you PBR
> MCAST
> and BCAST. You didn't really speak on that in general, and my
conclusion
> is
> NO. Because it is automatically sent out all interfaces by the nature
of
> MCAST and UCAST or a specific interface based on the RP or technology
in
> use. I noticed that a multicast ping fails to PBR too.
>
> Is this correct?
>
> -----Original Message-----
> From: Scott Savage [mailto:rolande23@sbcglobal.net]
> Sent: Thursday, July 15, 2004 12:44 PM
> To: trouse@cisco.com; ccielab@groupstudy.com
> Subject: Re: PBR w/ MULTICAST and BROADCAST
>
>
> The requirement is to send UNICAST updates. PBR would
> only change the next hop ip which would affect where
> the packet would be sent to at layer 2 based on the
> routing table lookup. If you want the update to be
> unicast, you have to NAT the destination IP address
> whether it is multicast or broadcast.
>
> --- trouse@cisco.com wrote:
> > Guys can you PBR multicast and broadcast?
> >
> > Trying to send UNICAST RIP UPDATES without using
> > neighbor command, NAT or anything special just PBR.
> > Will it work? if not why now?
>
>
> =====
> --
> Scott Savage
>
>
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