06-05-2006 05:44 AM - edited 03-03-2019 03:30 AM
I've router and PC station which send multicast traffic to address 239.255.1.1
All configs here -
http://www.cisco.com/en/US/tech/tk828/technologies_configuration_example09186a00801a5aa2.shtml
When i run
#sh ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
224.0.1.40 Tunnel0 02:35:51 00:02:17 8.8.8.9
But i don't see 239.255.1.1
Why so? How to resolve it?
06-05-2006 05:52 AM
Hello,
you said that you have 1 router and 1 PC, but the configs on the link are for a tunnel which involves 2 routers and 2 end stations?
PC is sending the traffic, but is there anyone listening?
did you use ip igmp joing-group 239.255.1.1 on the router?
Please give us more information.
thanks,
Vlad
06-05-2006 05:59 AM
Sorry, i've made lab like in the cisco's example. Certainly - 2 routers and 2 PC's.
I didn't use
ip igmp joing-group 239.255.1.1
Is't neccessary? I didn't found it in the cisco's example.
06-05-2006 06:04 AM
this command is only necessary when you dont have a multicast client software on the destination PC.
try it for instance, add this command on the interface leading to the 2nd PC.
Let me know,
Vlad
06-06-2006 03:18 AM
Yes, it's help
LEFT#sh ip igmp groups
IGMP Connected Group Membership
Group Address Interface Uptime Expires Last Reporter
239.255.1.1 Serial0/0/0 00:00:17 stopped 1.1.1.1
239.255.1.1 FastEthernet0/0 00:03:47 00:02:51 192.168.3.2
224.0.1.40 FastEthernet0/0 21:19:15 00:02:42 192.168.3.2
But i don't see multicast traffic at the reciver.
Where can be problem?
06-06-2006 03:21 AM
at the second router ( where connected mcast sender)
i see next-
Outgoing interface list: Null
may be here problem?
RIGHT#sh ip mroute 239.255.1.1
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
(*, 239.255.1.1), 00:25:34/stopped, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/0, Forward/Sparse-Dense, 00:25:34/00:00:00
(192.168.2.2, 239.255.1.1), 00:17:39/00:02:59, flags: PLT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
06-06-2006 06:59 AM
^ well.. so RIGHT router thinks no one from the LEFT router wants to join 239.255.1.1 ..
Can you paste the "show ip mroute 239.255.1.1" from
the LEFT router?
Make sure "ip pim sparse-dense-mode" is on the applicable interfaces ( so the tunnel interfaces and the e0/0 interfaces) ..
Eric
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: