Subject: Re: Multicasting
To: Seth Kurtzberg <>
From: David Brownlee <>
List: tech-net
Date: 09/23/2001 11:52:04
	Do you have 'options MROUTING' enabled in your kernel config?

		David/absolute		-- No hype required --

On Sun, 23 Sep 2001, Seth Kurtzberg wrote:

> I'm using NetBSD machines in a multi-stage security barrier.  Thus I have
> two NetBSD machines functioning as, among other things, IP routers.
> Everything is working except for the routing of multicast packets.
> When I run mrouted, it writes a log message stating that multicast support
> is not available in the kernel, and exits.
> Is multicast support controlled by a sysctl parameter?  Or, is it necessary
> to rebuild the kernel with multicast support?  Or, is there some other
> configuration tool (like sysctl) that allows me to enable multicasting?
> Each machine has a pair of 100BaseT NIC cards, and ifconfig reports
> multicast support on both:
>     tlp0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> All other packet types are working, NAT is working, ipf is working, so there
> isn't anything stupid (or at least not TOTALLY stupid) in the configuration.
> Thanks in advance...
> Seth Kurtzberg
> Machine Independent Software
> voice:  1-480-661-1849
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