From: Matthew Seppeler (Matt.Seppeler@InetX.com)
Date: Fri Oct 08 2004 - 18:16:30 GMT-3
Yes, this does help. Thanks!
-----Original Message-----
From: Brian McGahan [mailto:bmcgahan@internetworkexpert.com]
Sent: Fri 10/8/2004 3:26 PM
To: Matthew Seppeler
Cc: ccielab@groupstudy.com
Subject: RE: ip pim-nbma command
Matt,
The warning should really say "PIM nbma-mode will only be in
affect for sparse-mode groups". It's not that you can't run it in
sparse-dense, it's just that it only applies to sparse groups. The
reason for this is that it needs the explicit join messages that are
inherent to sparse mode pim.
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
> Matthew Seppeler
> Sent: Friday, October 08, 2004 2:35 PM
> To: Bob Sinclair; ccielab@groupstudy.com
> Subject: RE: ip pim-nbma command
>
> Bob,
>
> Yes, you'll need to change the mode to sparse-mode on the hub to get
it to
> take the nbma command. You can get the ip pim nbma-mode command to
stick
> on the hub if you use sparse-dense mode. However, you get the
following
> message after applying it: "PIM nbma-mode is not recommended for
sparse-
> dense-mode"
>
> Anyways, I need to play with this more to more fully understand it.
This
> is still a weak area for me.
>
>
>
> -----Original Message-----
> From: Bob Sinclair [mailto:bsin@cox.net]
> Sent: Fri 10/8/2004 10:54 AM
> To: Matthew Seppeler; ccielab@groupstudy.com
> Cc:
> Subject: Re: ip pim-nbma command
>
>
>
> Hi Matthew,
>
> The autorp listener allows you to configure just sparse-mode on
your
> interfaces while still allowing dense-mode distribution of the
> autorp groups
> 2240.1.39 and 224.0.1.40. Since you are still using dense mode
to
> distribute the RP mappings in this scenario, I don't think the
nbma-
> mode can
> be used to allow the mapping agent to be on a spoke. That is
what
> the
> theory tells me, but I have not specifically labbed up the
autorp
> listener -
> nbma-mode combination.
>
> Bob Sinclair
> CCIE #10427, CISSP, MCSE
> www.netmasterclass.net
>
> ----- Original Message -----
> From: "Matthew Seppeler" <Matt.Seppeler@InetX.com>
> To: "Bob Sinclair" <bsin@cox.net>; "Troy" <ta_levin@yahoo.com>;
> <ccielab@groupstudy.com>
> Sent: Friday, October 08, 2004 11:35 AM
> Subject: RE: ip pim-nbma command
>
>
> >I think this global command will also work: ip pim autorp
listener
> >(introduced in IOS ver 12.2(7).
> >
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
ip
> rmc_r/ip3_i2g.htm#wp1068637
> >
> >
> >
> > -----Original Message-----
> > From: Bob Sinclair [mailto:bsin@cox.net]
> > Sent: Fri 10/8/2004 8:58 AM
> > To: Troy; ccielab@groupstudy.com
> > Cc:
> > Subject: Re: ip pim-nbma command
> >
> >
> >
> > Troy,
> >
> > With nbma-mode configured on the hub, you can get sparse-mode
> traffic to
> > go
> > from one spoke to another. (I have not seen this particular
> functionality
> > mentioned in the Cisco docs, so please let me know if you have
> such a
> > link).
> > If you want the auto-rp mapping agent to work from a spoke in
such
> a
> > scenario, then you will have to make sure that the 224.0.1.40
> group is
> > distributed as a sparse-mode group. One way to do this is to
> define a
> > static RP just for this group.
> >
> > Bob Sinclair
> > CCIE #10427, CISSP, MCSE
> > www.netmasterclass.net
> >
> > ----- Original Message -----
> > From: "Troy" <ta_levin@yahoo.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Thursday, October 07, 2004 8:29 PM
> > Subject: ip pim-nbma command
> >
> >
> > > In a Hub and spoke configuration where the Hub has a P2mp
> interface does
> > > the ip pim-nbma command overcome multicast spilt-horizon?
In
> addition
> > > can
> > > the mapping agent in this configuration be on one spoke?
Will
> the other
> > > spoke receive the rp mappings?
> > >
> > > Thnaks,
> > >
> > > Troy
> > >
> > >
> > >
> > > ---------------------------------
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> > >
> > >
>
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