All things related to multicast

[Toerless Eckert <>]

On Tue, Jun 12, 2001 at 11:45:15PM -0500, Bill Nickless wrote:
> In other words, I want the exchange point forwarding topology to be 
> controlled by BGP, not by the underlying PIM protocol.  You may have a 
> different perspective.  :)

No, i'm in  complete agreement on this point, remember, that's why i
proposed the multi-VLAN setup ;-)) 

> Yes, as a participant I *do* want to be able to choose my upstream.   In 
> fact, as an upstream participant I might want to constrain (through my 
> decisions on what prefixes to advertise) who is eligible to get me to start 
> forwarding packets into the exchange point.

Well, just by announcing prefixes you do not limit the downstream
PIM routers that can send you joins. If you use a whole point-to-point
model, you've got an easy solution (but of course need to copy on
your router to each downstream peer). If you go for the multiple VLAN
model, then you simply define the allowed PIM neighbors on your VLAN.
PIM security would probably come in handy in this case.

Cheers
        Toerless