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by theod 3787 days ago
As mentioned in https://github.com/docker/docker/issues/3043#issuecomment-51..., multicast works in bridge driver. It works for the default docker0 bridge network and also other user-defined bridge networks.

Docker 1.9 brought in Native multi-host networking support using overlay driver. Proper multicast support for the overlay driver would require proper multicast control-plane (L2 & L3). Contributions welcome.