From: Surendran (surenv@hpssk211.sgp.hp.com)
Date: Tue Dec 10 2002 - 08:25:40 GMT-3
I am sorry Joe, I have already torn down the setup. If I do the setup
again. I will get those info and pass it to you.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Joe Chang
Sent: Tuesday, December 10, 2002 7:27 AM
To: ccielab@groupstudy.com
Subject: Re: Multicast NBMA
That's interesting Suren. Could you try to capture some debugs on the
RP-Announce and RP-Discovery messages and share them with us?
----- Original Message -----
From: "Surendran" <surenv@hpssk211.sgp.hp.com>
To: "'Joe Chang'" <changjoe@earthlink.net>; <ccielab@groupstudy.com>
Sent: Monday, December 09, 2002 8:03 AM
Subject: RE: Multicast NBMA
> Hi Joe,
> That's what I thought too. However, it works. I have tried this, the
> ip nbma-mode is doing something to help the forwarding, I guess..
>
> Suren
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Joe Chang
> Sent: Sunday, December 08, 2002 11:24 PM
> To: ccielab@groupstudy.com
> Subject: Re: Multicast NBMA
>
>
> > Hi Group,
> > I have some question on Multicast over NBMA. I read from Cisco
> > documentation that NBMA mode is to be used in a frame relay cloud
> > and ip sparse mode should be used with this. However, I also
> > understand Auto-RP, requires dense mode to broadcast its RP group
> > advertisements.
>
> > For example below,
> >
> >
> > R1------R2-------FR--------R3
> > \
> > \___ R4
> >
> > R1 and R2 are connected to each other with ethernet cable. R2 is the
> > central hub and R3 & R4 are spokes in the frame-relay cloud. Lets
> > say,
>
> > I am using R1 as my Candidate-RP and Mapping Agent. According to
> > Cisco documentation I must run ip pim nbma-mode & ip pim sparse
> > mode. R1 will be sending out RP information to all the routers.
> > However, in a sparse mode environment the routers R3 & R4 must join
> > the group 224.0.1.40 to receive this information in the first place.
> > Theoretically, should not work....how then does it work?
> >
> You're right it won't work. ip pim sparse-dense-mode must be
> configured on all the routers for this topology to work. In fact
> whenever multicast routers are not directly connected to the mapping
> agent, sparse-dense mode is required. . .
.
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