11-27-2017 01:21 PM - edited 03-10-2019 01:14 PM
Hello everyone, I'm in trouble with multicast.
Topology is DC (Data center routers) connected via /30 with Core connected via /30 with access switch. All of them are 6500 and, as you can imagine, DC is an access layer too, only it connects servers.
Multicast is configured as "sparse-mode".
Connected to DC are a couple DCMs acting as multicast sources for our IPTV system. at access layer we've IPTVs and user computers (that can tune a channel with VLC using the mcast IP address).
As part of an experiment I'm trying to source a video, using VLC, from my PC. Problem is I can only get what I'm streaming in other PCs in the same vlan, but not on other access switches (other floors).
So, on vlan11 I can only receive multicast video streams, but can't generate there (tried 2 different access swithces).
can you help? Thank you!
Solved! Go to Solution.
11-28-2017 12:02 PM
Everyone, thank you so much for you assistance. Problem was VLC streaming with a TTL=1, despite explicit setting for ttl=12.
Found it with wireshark on my pc
11-27-2017 05:21 PM
Hi,
Is the core your RP? what is the output of the following: "show ip mroute"on the RP?
what is the ttl of the multicast stream?
Thanks
John
11-27-2017 06:44 PM
11-28-2017 03:43 AM
11-28-2017 04:20 AM - edited 11-28-2017 05:00 AM
ttl = 12
EDIT
Also, please note that if I try to tune that stream I'm generating from my computer I get a (*,G) entry in the access router (whether is the one my computer is attached to, or another access router) and at the core router. But I never get the (S,G) entry showing my IP as the source.
EDIT2
Just in case it's relevant, the SVI configuration in access switches include a helper-address, while the SVI at the DC, does not. I did read that it may affect something, but don't really know.
11-28-2017 09:39 AM
11-28-2017 09:51 AM
Interface VLAN does have the pim command enabled, so I'm trying to stream on a L3 environment
11-28-2017 12:02 PM
Everyone, thank you so much for you assistance. Problem was VLC streaming with a TTL=1, despite explicit setting for ttl=12.
Found it with wireshark on my pc
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