From: kenneth.goodwin@verizon.com
Date: Tue Aug 02 2005 - 14:07:17 GMT-3
Please remove my email account:
gladston@br.ibm.c
om To: ccielab@groupstudy.com
Sent by: cc:
nobody@groupstudy Subject: Re: Multicast over FR
.com
08/02/2005 12:47
PM
Please respond to
gladston
Hi Thomwin,
As you check out, without nbma-mode the router sends the multicast out of
the interface, with no regards if there is one or many routers on the other
side.
nbma-mode helps to avoid it, and more, if one of the spoke sent a prune
message to the hub, the other spoke would not 'hear' that and it would lost
multicast packets (considering it has attached receivers).
Now, I would not say nbma-mode is always required.
If you mean real world, it would probably be using subinterface for each
neighbor, so no need to use it here.
If you mean on the lab, as you said, nbma-mode is helpful only for
sparse-mode.
A question:
You have spoke R2 and R3, both connected to hub R1. You want R2 and R3
receive multicast from R1. Must be dense mode. How can you solve the
problem of R2 stop receiving multicast when R3 sends a prune to R1?
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