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Date: Sat, 30 Jan 2010 08:25:12 +0000
From: Bruce Simpson <bms@incunabulum.net>
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Subject: Re: Tunneling in freeBSD
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On 01/30/10 04:11, Nazeem نجم لدين wrote:
> hi,
>
> Can you suggest way of getting a multicast tunnel work. The assumption is
> that there is a unicast cloud in between two mbone networks. So we need to
> forward the multicast traffic over the unicast tunnel. Application is for
> video transmission.
>    

Just configure up a gre(4) or gif(4) interface and specify to mrouted 
it's a 'phyint'.