Hi all,
I might be coming with a silly question now but my experience in
Multicast is not so well developed.
On an equipment that I have access to, I just noticed some messages
while activating IGMP debugging in a setup that was functional for some
time and is still working now, albeit with some strange behavior.
Basically the topology looks like this:
Streaming Device --> Multicast Router (ASR) --> Distribution Switch
(C4924-ME) --> IGMP proxies --> end hosts
The Distribution switch has:
- IGMP snooping enabled
- IGMPv3 support toward the Secondary network (although we don't use the
extra functionality provided by IGMPv3...)
- is the IGMP querier.
All works well (or seems so) except for some corner cases when I noticed
abnormal behavior.
Activating debug ip igmp snooping on the DS switch, I see things like below.
IGMPSN: group: Failed to create Host entry for 10.10.10.1, group
239.10.23.22 on port Gi1/3
this in turn causes the other error upon 10.10.10.1 (an IGMP proxy in
the secondary network) leaving the group:
IGMPSN: group: Leave from a non existant Host 10.10.10.1 group
239.10.23.22 on port Gi1/3
10.10.10.1 = an IGMP proxy in the network connected to the DS (which is
a black cloud for me)
VLC is running somewhere on a host behind the layer with the IGMP proxy,
joining a mcast group and leaving it for my specific debugging.
I've been googling a bit without success and also activated more
debugging but stil did not get a more meaningful idea about what is
causing this.
Did anyone else stumble upon such behavior ?
Am I missing something that's really basic but escaping my eyes ?
I'd be very grateful for any kind of advice :) even to read the manual
if I missed something that was way too obvious.
Thanks in advance,
Mihai
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
