From: Peter Ding (pding@cisco.com)
Date: Mon Oct 11 2004 - 12:48:44 GMT-3
Based on the link below, the RP mapping agent is the router that sends the
authoritative discovery packets telling other routers which group-to-RP
mapping to use.
Let's say we have the following setup for auto-rp in PIM-SM:
R1 -- R2 -- R3
Where R1 is the RP, R2 is the mapping agent and R3 is one of the other
routers.
In order for R3 to talk to R2, I think the minimal configuration on R3 is
"ip pim sparse". Is my understanding correct?
Thanks,
PD
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Richard Dumoulin
Sent: Monday, October 11, 2004 6:06 AM
To: ccie2be; ccielab@groupstudy.com
Subject: RE : Auto-RP vs. static RP
Hi Tim, this is documented in the doc cd. See the second note here
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr
_c/ipcpt3/1cfmulti.htm#1001143
--Richard
CCIE #13891
-----Message d'origine-----
De : ccie2be [mailto:ccie2be@nyc.rr.com]
Envoyi : Monday, October 11, 2004 2:02 PM
@ : Brian McGahan; samccie2004@yahoo.co.uk; Craig Dorry; Peter Ding;
ccielab@groupstudy.com Objet : Re: Auto-RP vs. static RP
Hey Brian,
What do mean, "All you have to do is manually assign an RP that can accept
join messages for the 224.0.1.39 and 224.0.1.40 groups."?
Thanks, Tim
----- Original Message -----
From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
To: <samccie2004@yahoo.co.uk>; "Craig Dorry" <chdorry@yahoo.com>; "Peter
Ding" <pding@cisco.com>; <ccielab@groupstudy.com>
Sent: Sunday, October 10, 2004 8:42 PM
Subject: RE: Auto-RP vs. static RP
> Sam,
>
> You can still run auto-rp in a sparse-only network without using the
> listener command. All you have to do is manually assign an RP that
> can accept join messages for the 224.0.1.39 and 224.0.1.40 groups.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > samccie2004@yahoo.co.uk
> > Sent: Sunday, October 10, 2004 12:54 AM
> > To: 'Craig Dorry'; 'Peter Ding'; ccielab@groupstudy.com
> > Subject: RE: Auto-RP vs. static RP
> >
> > Another thing might be sparse mode Vs sparse-dense. If u are asked
> > to only use sparse mode, I guess you will have to use static RP
> > instead
> of
> > auto RP where initial discovery will not depend on dense mode.
> >
> > Then again, u can use listener command and bypass the need for dense
> > mode.
> >
> >
> > HTH
> >
> > Sam
> >
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Craig Dorry
> > Sent: 10 October 2004 02:51
> > To: Peter Ding; ccielab@groupstudy.com
> > Subject: Re: Auto-RP vs. static RP
> >
> > PD - As it has been mentioned before, it depends on a number of
> > things.
> >
> > The main difference between auto-rp and static RP is
> > where the configuration needs to be done to add a
> > multicast group (or scope of groups). So it all
> > depends on how much control you want to have as well
> > as the size of the network and how comfortable the administrator is
> > with pushing changes (ie ACL updates) to the number of devices under
> > management.
> >
> > I've seen auto-rp selected most typically for either
> > large networks or where the administrator wanted to
> > have full control over what groups were forwarded (ie forcing users
> > to "register" their multicast application/group prior to the network
> > supporting the traffic.
> >
> > Hope this helps.
> >
> > --- Peter Ding <pding@cisco.com> wrote:
> >
> > > Since both auto-rp and static rp can be used in PIM
> > > SM mode, what are the
> > > criterias that will lead me to use one over other?
> > >
> > > Thanks,
> > >
> > > PD
> > >
> > >
> >
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