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multicast problems

DISCUSSION Simon Vincent 2 participants 2 messages Oct 20, 2014 IEEE 802.15.4

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Simon Vincent

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Has anyone had any luck using Site-Local or Realm-Local multicast over 14.5/6lowpan?

I find if I subscribe to a multicast group using a site-local or realm-local scope I can't ping the multicast group. If I try the same on a ethernet interface I can ping the multicast group no problems.

Simon

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Hi Simon,

Quoted 6 lines · Simon Vincent

Has anyone had any luck using Site-Local or Realm-Local multicast over 14.5/6lowpan?

I find if I subscribe to a multicast group using a site-local or realm-local scope I can't ping the multicast group. If I try the same on a ethernet interface I can ping the multicast group no problems.

mhh, did you also tried it without the overwritten pkt_type value PACKET_HOST? Just drop it in 802.15.4 6LoWPAN for testing case.

Maybe, you hit the problem at [0].

This occurs when "Type 131 - Multicast Listener Report" arrived. [1]

Don't know much about Multicast Listener Report at the moment and if this is really necessary for your use case.

Just give it a try. It's something with multicast and I know there is some issue right now.

- Alex

[0] http://lxr.free-electrons.com/source/net/ipv6/mcast.c#L1426
[1] http://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xhtml#icmpv6-parameters-codes-9