11-15-2011 06:13 AM - edited 03-07-2019 03:24 AM
Hello,
I faced multicast routing problem - There is no multicast UDP stream toward host, allthought all igmp Joins/Reports/Leaves from the host are correct.
This is cisco 7609 ip mroute debug showing the situation:
369144: Nov 15 15:03:07.370 MSK: IGMP(0): Received v2 Report on Vlan176 from 10.XXX.XX.184 for 239.XXX.XX.46
369145: Nov 15 15:03:07.370 MSK: IGMP(0): Received Group record for group 239.XXX.XX.46, mode 2 from 10.XXX.XX.184 for 0 sources
369146: Nov 15 15:03:07.370 MSK: IGMP(0): Updating EXCLUDE group timer for 239.XXX.XX.46
369147: Nov 15 15:03:07.370 MSK: IGMP(0): MRT Add/Update Vlan176 for (*,239.XXX.XX.46) by 0
369148: Nov 15 15:03:07.370 MSK: MRT(0): Update (*,239.XXX.XX.46), RPF /0.0.0.0
369149: Nov 15 15:03:07.370 MSK: MRT(0): Update Vlan176/239.XXX.XX.46 in the olist of (*, 239.XXX.XX.46), Forward state - MAC not built
369150: Nov 15 15:03:07.370 MSK: MRT(0): Update Vlan176/239.XXX.XX.46 in the olist of (172.XX.XXX.3, 239.XX.XX.46), Forward state - MAC not built
Any ideas?
11-15-2011 06:49 AM
Could be a number of things.
Are you using sparse or dense mode ?
Can you post the output of "sh ip mroute" from all the L3 devicees between the source and the receiver ?
Have you checked that the TTL of the multicast stream is high enough to account for all the L3 hops the stream has to go across ?
Jon
11-17-2011 10:29 PM
Hello Jon,
1. Sparse-mode configured.
2. Sh ip mroute output - router A
(*, 233.XX.XX.1), 6w3d/00:03:03, RP 82.199.119.9, flags: SJC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Te1/0/0.1101, Forward/Sparse, 5w3d/00:03:03
Vlan156, Forward/Sparse, 6w1d/00:02:53
Vlan72, Forward/Sparse, 6w3d/00:02:25
Te1/0/1.1102, Forward/Sparse, 6w3d/00:03:00
Vlan158, Forward/Sparse, 6w3d/00:02:53
(192.XXX.XX.22, 233.XX.XX.1), 5w5d/00:03:09, flags: TA
Incoming interface: Vlan897, RPF nbr 0.0.0.0, RPF-MFD
Outgoing interface list:
Te1/0/0.1101, Forward/Sparse, 5w3d/00:03:03, H
Vlan158, Forward/Sparse, 5w5d/00:02:57, H
Te1/0/1.1102, Forward/Sparse, 5w5d/00:03:00, H
Vlan72, Forward/Sparse, 5w5d/00:02:25, H
Vlan156, Forward/Sparse, 5w5d/00:02:53, H
Sh ip mroute - router B
(*, 233.XX.XX.1), 7w0d/00:05:35, RP 82.199.119.9, flags: SJC
Incoming interface: Te1/0/1.1102, RPF nbr 82.199.119.69, Partial-SC
Outgoing interface list:
Vlan176, Forward/Sparse, 15w1d/00:02:20, H
3. TTL for groups 233.XX.XX.* in packets = 54
11-21-2011 11:16 PM
Hi all,
I updated router's software from c7600s72033-advipservicesk9-mz.122-33.SRC3.bin to latest IOS available
(c7600s72033-advipservicesk9-mz.122-33.SRC6.bin) and after reload the problem disappeared.
I've no idea whether it was software issue or just reload issue.
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