Multicast Routing Issue

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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Received on Fri Jul 31 2009 - 11:53:24 ART