From: Aiman A. M. (drpower@xxxxxxxxxxx)
Date: Fri Jan 04 2002 - 15:58:03 GMT-3
hi all,
how to do multicasting in token ring enviroment ?, thanx.
Aiman
>From: "Kirby, Ron" <Ron.Kirby@getronics.com>
>Reply-To: "Kirby, Ron" <Ron.Kirby@getronics.com>
>To: ccielab@groupstudy.com
>Subject: Multicast over NBMA
>Date: Fri, 4 Jan 2002 10:44:23 -0500
>
>All,
>
>I am working with multicasting over a frame cloud. R1 has a multipoint
>subinterface connected to R3 and R4 which are using physical interfaces
>(basic hub and spoke design). I am using EIGRP and have split horizon
>turned
>off at the hub (R1). The routing table is fine and everything can be
>pinged.
>
>Now, Pim is running on all routers and dense mode on all interfaces. I
>have
>pim neighbor relationships between R1 and R3 and R1 and R4. Here's the
>problem. R1 (the hub) has an mroute entry for the multicast source off of
>R3 as shown below:
>
>**********************************************
>r1#sh ip mroute 234.5.6.7
>IP Multicast Routing Table
>Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
> R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT
> M - MSDP created entry, X - Proxy Join Timer Running
> A - Candidate for MSDP Advertisement
>Outgoing interface flags: H - Hardware switched
>Timers: Uptime/Expires
>Interface state: Interface, Next-Hop or VCD, State/Mode
>
>(*, 234.5.6.7), 00:12:31/00:02:59, RP 0.0.0.0, flags: D
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list:
> Ethernet0/0, Forward/Dense, 00:12:09/00:00:00
> Serial0/0.2, Forward/Dense, 00:12:31/00:00:00
> Serial0/0.1, Forward/Dense, 00:12:31/00:00:00
>
>(192.168.30.2, 234.5.6.7), 00:02:46/00:00:24, flags: PT
> Incoming interface: Serial0/0.2, RPF nbr 131.5.20.3
> Outgoing interface list:
> Serial0/0.1, Prune/Dense, 00:02:46/00:00:19
> Ethernet0/0, Prune/Dense, 00:02:46/00:00:19
>***************************************************
>
>
>As you can see, S0/0.2 is not in the outgoing interface list, and I figure
>it is because the router does it's RPF check and finds that the upstream
>interface is S0/0.2 and therefore S0/0.2 is not a candidate for flooding
>the
>multicast data. So how do I get the multicast traffic to a host on R4? I
>believe my possibilities are a tunnel between R1 and R3 and R1 and R4 for
>multicast purposes, or moving to frame-relay P-to-P subinterfaces. I have
>also worked with the NBMA mode command, but it doesn't look as if it is
>designed for this. Is there a command line solution available?
>
>Thanks
>Ron
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