Do you have 'options MROUTING' enabled in your kernel config?

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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
> fax:    1-480-614-8909
> email:  seth@cql.com
> Pager 1-888-605-9296  or 6059296@skytel.com
>
>
>