[AG-TECH] Additional bridging questions

Robert Olson olson at mcs.anl.gov
Fri Jun 6 14:58:47 CDT 2003

>What is the bandwidth of the unicast connection that comes out of the 
>bridge?  Can one assume that it is close to an aggregate of all of the 
>multicast streams that one might receive at a fully connected AG node?

Yup. The msb and qb bridges are dumb in that they forward down each unicast 
link the aggregation of all traffic from the other unicast links and the 
multicast link (and vice versa, but that will likely be much less traffic).

>Looking at the Quickbridge, it seems a viable option, and I've heard of it 
>being done, to use two Quickbridges on either side of a firewall (or 
>router) to 'tunnel' the multicast between two disconnected multicast 
>domains.  Anybody done this?  Willing to share the details?

If you're doing this anyway, would it be possible to convince the firewall 
admins to just let multicast UDP pass thru? (I think Bill Nickless has some 
slides somewhere on the security implications of multicast)


More information about the ag-tech mailing list