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List: openvswitch-discuss
Subject: [ovs-discuss] Multicast over GRE Tunnels
From: ahp.caringo () gmail ! com (Aaron Pierce)
Date: 2015-06-29 22:26:12
Message-ID: CAAcraLo2T_Q-Np+fVg3cbgQH2UXeX_p47k=8r0+iz8MXDx2v6Q () mail ! gmail ! com
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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 <jesse at nicira.com> wrote:
> On Fri, Jun 26, 2015 at 12:36 PM, Aaron Pierce <ahp.caringo at 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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