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I'm teaching a class IPv6 and would like to create a lab for them to see the true benefit of ipv6 multicasting in action.

I created a multicast address for myself

ff15::1 (where ff is multicast, 1 is transient, no rsvp, and 5 is site scope). I then gave myself a group id of 1.

I get an "No route to host" error when trying to start the stream. Any ideas greatly appreciated.

ps: I know almost nothing about streaming.

main debug: net: connecting to [[FF15::1]]:1234
main warning: [FF15::1] port 1234 : No route to host
access_output_udp error: failed to create raw UDP socket
main warning: no sout access module matching "udp" could be loaded
main debug: TIMER module_need() : 1.171 ms - Total 1.171 ms / 1 intvls (Avg 1.171 ms)
stream_out_standard error: no suitable sout access module for `udp/ts://[FF15::1]'

Surely if its a brand new multicast, there won't be a route to host until someone listens?

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I know very little about IPv6 myself - but did you give the interface a unicast address as well? – mfinni Feb 21 '12 at 19:51
It also might be worth mentioning what OS you're using. – mfinni Feb 21 '12 at 19:55
Does your system have an IPv6 address? Can you should us (a) your interface configuration, and (b) your IPv6 routing table(s)? – larsks Feb 21 '12 at 19:59
Do not configure the NIC's interfaces for anything. If you're using ancient OSes you have to finagle them, but for anything half modern you should not. – Chris S Feb 21 '12 at 20:05
I'm using OS X 10.6.8 – Mark van Wyk Mar 27 '12 at 21:08


  1. Open VLC, File->Streaming
  2. Add files to be streamed, preferably something that doesn't need to be transcoded.
  3. Stream button.
  4. Next.
  5. New Destionation -> "RTP / MPEG Transport Stream". Add button.
  6. Address [ff15::1] (with the brackets!)
  7. Uncheck Active Transcoding. Next. Stream.


  1. Open VLC, File-> Open Network Stream...
  2. URL: rtp://[ff15::1]
  3. Play

Works like a charm if both are IPv6 enabled and the network supports multicast (anything in the last 10 years basically). The UDP streaming hasn't been updated in a while, it probably doesn't support IPv6, but I don't know that for certain.

Note: One the clients are playing the stream the server can stop and start a new stream usually without interruption... So once the initial list of media is done playing repeat the Server instructions and the client should start playing the new media.

share|improve this answer
Thanks Chris, I'll give it a go! – Mark van Wyk Feb 21 '12 at 20:06
I'm still getting a "no route to host" in the log file... (I'm on OS X, by the way, so my screens are slightly different) – Mark van Wyk Feb 21 '12 at 20:12
Are you running OSX 10.2 (Jaguar) or higher? – Chris S Feb 21 '12 at 20:16
Snow Leopard... – Mark van Wyk Feb 21 '12 at 20:52
And you're using RTP as UDP has "poor" IPv6 support? – Chris S Feb 21 '12 at 21:15

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