[AG-TECH] Re: setting up local bridging service
olson at mcs.anl.gov
Mon Jun 21 10:40:22 CDT 2004
Hi Josh -
I'm sorry about the late reply on this - I tried to find it in my ag-tech
mail but didn't see it there, wonder if it bounced somewhere. Anyway:
> We are trying to set up a local bridging service adjacent to our wide
> area router so that AG traffic will be unicast on our lan. I would
> like to get some information and advice about how to proceed. In no
> particular order here are the questions issues we are grappling with:
> 1. Will this work ? The plan is to set up a box which will
> bridge all of the AG traffic for our site. We will configure
> our switches to allow multicast between the router and this
> box but not between the router and the rest of our lan.
Yes, that sounds like a good solution.
> 2. If we do this will the bridge have to participate in all
> venues that we might want to participate or will it only have
> to participate in the venues we happen to be visiting at any
> given moment.
What do you mean by participate in? If you mean "join the multicast group",
I believe the way it works is that the bridge will only join the group when
a unicast user enters the venue.
> 3. Should we be running our own venue server on this bridge node
> ? Will this help or hinder us in our unicast goals ?
No, I don't see any need to do that (I'm assuming you are running a venue
server elsewhere on your network).
> 4. How good a computer to we need for this purpose ?
It depends in some extent on the number of bridge users you are supporting;
however, I'm sure a reasonably recent 1Ghz + Pentium box will serve well
(the ANL MSB bridge ran for a long time on PIII/600 box, and before that on
an even smaller machine). You'll want 100Mbit etheret, or 1G if possible
(mostly for headroom; I don't anticipate you'll see nearly that much
traffic, unless the HD folks start doing AG multicasting :-).
> 5. Should it run windows or linux ?
Linux; I don't believe we support Windows for bridge servers yet.
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