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Date:      Sat, 2 Nov 2019 15:43:33 -0700 (PDT)
From:      "Rodney W. Grimes" <freebsd-rwg@gndrsh.dnsmgr.net>
To:        Victor Gamov <vit@otcnet.ru>
Cc:        freebsd-net@freebsd.org
Subject:   Re: FreeBSD as multicast router
Message-ID:  <201911022243.xA2MhXIm093435@gndrsh.dnsmgr.net>
In-Reply-To: <10688d9e-80af-3f03-425e-1b74d69c05f0@otcnet.ru>

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> Hi All
> 
> I have (noob) questions about multicast routing under FreeBSD.
> 
> I have FreeBSD box with two (or more) multicast enabled interfaces (e.x. 
> vlan750 and vlan299).  vlan750 connected to multicast source.
> 
> Then pimd installed and only this two interfaces enabled in pimd config. 
> Multicast routes successfully installed by pimd and listed by `netstat 
> -g -f inet`
> 
> Then client on vlan299 send IGMP-Join (this Join received by FreeBSD on 
> vlan299)
> 
> The question is:  who will forward muilticast from one interface 
> (vlan750) to another (vlan299)?  Is it kernel specific job or I need 
> additional software?

Please read the manpage multicast(4) "man 4 multicast",
you should need to build a custom kernel with the "options MROUTING"
to enable the multicast forwarding in the kernel.

> Victor Gamov

-- 
Rod Grimes                                                 rgrimes@freebsd.org



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