Re: Multicast Routing Issue

Try a "debug ip mpacket" on that device and see what you can find out. That
will help diagnose the problem.

On Fri, Jul 31, 2009 at 11:53 AM, <quinton_at_flowtraders.com> wrote:

> Morning All,
>
> I am trying to determine why a PIM-SM RP is pruning a m/cast group from the
> m/cast routing table. PIM neighbor relationships are established and there
> is
> no problem with RPF. I have the following output from "sh ip mroute
> 239.33.42.1
> count.
>
> pcoresw01#sh ip mroute 239.33.42.1 count
> IP Multicast Statistics
> 7 routes using 3826 bytes of memory
> 6 groups, 0.16 average sources per group
> Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per
> second
> Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)
>
> Group: 239.33.42.1, Source count: 1, Packets forwarded: 0, Packets
> received:
> 70758
> RP-tree: Forwarding: 0/0/0/0, Other: 67595/0/67595
> Source: 10.33.42.134/32, Forwarding: 0/-1/0/0, Other: 3163/0/3163
>
> AND
>
> pcoresw01#sh ip mroute
> IP Multicast Routing Table
> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, 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,
> U - URD, I - Received Source Specific Host Report, Z - Multicast Tunnel
> Y - Joined MDT-data group, y - Sending to MDT-data group
> Outgoing interface flags: H - Hardware switched, A - Assert winner
> Timers: Uptime/Expires
> Interface state: Interface, Next-Hop or VCD, State/Mode
>
> (*, 239.33.42.1), 1d06h/stopped, RP 10.254.254.9, flags: SP
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list: Null
>
> (10.33.42.134, 239.33.42.1), 02:22:33/00:02:53, flags: PT
> Incoming interface: Vlan42, RPF nbr 0.0.0.0, RPF-MFD
> Outgoing interface list: Null
>
> My question is this: what does the Other: 3163/0/3163 represent. I
> understand
> that these are multicast packet which have been dropped but I need to find
> out
> why the drops occurred.
>
> Many thanks
>
> Quinton
>
>
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-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
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