From: Seth Chen (seth-cs_chen@xxxxxx)
Date: Fri Oct 08 1999 - 04:51:28 GMT-3
Hi,
I met a very strange problem.
Here is the extract config & output:
======================
...
ip multicast-routing
!
interface Ethernet0
ip address 192.168.10.2 255.255.255.0
ip pim dense-mode
ip igmp join-group 224.3.3.3
...
r5#sh ip mroute 224.3.3.3
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
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.3.3.3), 00:23:30/00:00:00, RP 0.0.0.0, flags: DJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Ethernet0, Forward/Dense, 00:23:30/00:00:00
========================
I cann't get reply even pinging this group addr. locally.
After I create a loopback interface, assign ip addr. and config ip pim dense-mo
de
on it, I can get the reply.
=========================
ip multicast-routing
!
!
interface Loopback0
ip address 137.12.8.1 255.255.255.0
ip pim dense-mode
!
interface Ethernet0
ip address 192.168.10.2 255.255.255.0
ip pim dense-mode
ip igmp join-group 224.3.3.3
r5#sh ip mr 224.3.3.3
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
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.3.3.3), 00:27:05/00:00:00, RP 0.0.0.0, flags: DJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Ethernet0, Forward/Dense, 00:27:05/00:00:00
(137.12.8.1/32, 224.3.3.3), 00:00:22/00:02:37, flags: CLT
Incoming interface: Loopback0, RPF nbr 0.0.0.0
Outgoing interface list:
Ethernet0, Forward/Dense, 00:00:23/00:00:00
=========================
I'm pulling my hair out. Have someone met this kind of problem before?
The IOS version is 11.2(14).
TIA,
Seth
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