Re: Help: Tunneling multicast

From: Wayne Throop (throopw_at_sheol.org)
Date: 01/26/04 

Date: Mon, 26 Jan 2004 05:47:22 GMT

: "Bev A. Kupf" <bevakupf@myhome.net>
: Explain this a little? What do you mean "start up your OWN routing
: daemons to supplement them"? Each of my linux boxes has a single
: interface (eth0) hooked up to the subnet that it is in. I don't have
: a single box with four interfaces - one in each subnet.

That's a fairly normal circumstance for tunneling.
You can configure a node as a router, and have it send the packets along
inside UDP (or other protocols) packets to routers elsewhere. In essence,
this wraps the eligable packets in notional envelopes, and sends them
to someprocess elsewhere. Normally these packets-in-an-envelope
would go back out the eth0 interface.

Excuse me if you already knew all that and I'm mistaking the question.

: I have looked into mrouted. It supports tunneling, but only one
: tunnel interface (as far as I can tell).

Hrm. I'm surprised. I though for sure it'd do multiple tunnels.
Since lots of the internet doesn't route multicast, having multicast
routing demons handle multiple tunnels is pretty much required.

But as I say, my needs are more modest, so while I read *about* mrouted,
I haven't actually set it up. I've used the more modest tunneling tools
mtunnel and udptunnel.

Wayne Throop throopw@sheol.org http://sheol.org/throopw

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