All things related to multicast

[Alan Crosswell <>]

Talk to Kevin Miller at Duke and Dave Farmer at Minnesota regarding MPLS
and Multicast.  Dave had a pained expression on his face when he talked
about doing MPLS with Multicast last week.

It would be good to include whatever you learn in the workshop materials
as it appears more and more campuses are going this route.
/a

debbie fligor wrote:
> We're doing some planning for our next-generation campus core network. 
> We're planning on using VRFs to provide some specialty services (like a
> high-speed research network that bypasses the exit firewalls).
> 
> Here's a very simplified version of what we're thinking it will look like:
> 
> 
> ------------------------------------------------------------------------
> 
> 
> 
> 
> and an ascii version for those that don't do inline jpegs:
> 
> vrf blue net 3 --- (dist router) -- (core router) -- (dist router) ---
> vrf blue net 4
>                    /                                      /
> vrf red net 1 ----/                         vrf red net 2/
> 
> 
> We want to be sure that Intra-VRF multicast (eg. from net 3 to net 4,
> all in the "blue" vrf) will work if the links between the dist routers
> and core routers are MPLS based.  We're confident we can make it work if
> the links between the core and dist routers are L2 and we use VRF-lite,
> but we are interested in considering MPLS instead.
> 
> We're assuming we'll be able to make the Inter VRF multicast work, even
> if it's a the other side of our exit, by treating them as L3 peerings.
> 
> 
> So if you've done something like this, how did you do it?  So far it
> looks like we'd have to run BGP as a core routing protocol and exchange
> NLRIs with MBGP, if that's even defined over MPLS (I don't think the
> standard for that is done, info on that is also appreciated). We're not
> sure BGP makes an ideal core routing protocol for a campus.
> 
> We're especially interested in hearing how you have made something like
> this work (or not!) on Cisco 6500's and Juniper MX-480 or MX-960. 
> Anything you've done with other vendor's gear that you think might be
> insightful is also appreciated.
> 
> thanks!
> 
> 
> -----
> -debbie
> Debbie Fligor, n9dn       Network Engineer, CITES, Univ. of Il
> email: 
> 
>           <http://www.uiuc.edu/ph/www/fligor>
>                    "My turn."  -River Tam
> 
> 
> 
>