I would like to use OVS/GRE to tunnel multicast between nodes. I've set up a test environment, and am unable to get multicast working between GRE connected nodes(UDP and TCP work fine).
I also found a 5 year old thread suggesting that multicast over GRE isn't implemented: http://openvswitch.org/pipermail/discuss/2010-September/004454.html > This configuration would normally work. However, multicast isn't > currently implemented in the Open vSwitch GRE stack. It's planned and > it shouldn't be too much work but it hasn't been done yet. Should multicast over a GRE tunnel work? What I've tried(Ubuntu 14.04 w/OVS v2.3.1): $> ovs-vsctl add-br br1 $> ovs-vsctl set bridge br1 stp_enable=true $> ip addr add 10.1.2.11/24 dev br1 $> ovs-vsctl add-port br1 gre1 -- set interface gre1 type=gre options:remote_ip=<remote ip> When both nodes are configured, I can ping and use iperf for TCP and UDP test, but attempting a multicast test fails. - Aaron
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