Thank you for the clarification. I was able to get multicast traffic over the tunnel after adding a routing rule for the multicast IP address. Once I figured that out, I was able to finish my proof-of-concept successfully.
I look forward to using Open vSwitch in my project. - Aaron On Mon, Jun 29, 2015 at 4:09 PM, Jesse Gross <je...@nicira.com> wrote: > On Fri, Jun 26, 2015 at 12:36 PM, Aaron Pierce <ahp.cari...@gmail.com> > wrote: > > 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? > > Nothing was ever implemented on this front, so it hasn't changed. It > should be possible to run multicast traffic over a unicast tunnel > (since the tunnel itself doesn't care about IP layer) but there's no > support for the tunnels themselves being multicast. >
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