pim dense mode on frame relay

Hey Guys,

I was messing around with some multicast stuff today. I was doing some stuff
with PIM NBMA mode in sparse mode. So, maybe I should first say how I think
it works and you guys tell me how wrong I am :P. How I understand PIM NBMA
mode to work, is that it keeps track of joins from neighbors and puts them
in the OIL as seperate entries (rather than just the interface the request
came in on). So you get seperate entries per neighbor, per interface. This
sorta works around the "dont send a multicast back out the interface you
received it on" rule and some other issues (leaving a group, etc).

So I started thinking... how do you work around this same issue in dense
mode? I googled around for an answer and someone suggested you tunnel from
spoke to spoke. That seems like it would work, but I havent tried it. Is
that the answer or is there a better way?
Also, what if you are using sparse-dense mode for AutoRP. I noticed IOS pops
a message up basically saying "It's not recommended to turn on NBMA mode
while using sparse-dense mode". Why not, other than it's not going to work
for multicast groups that rely on dense-mode?

TIA for helping me understand.

Chris

Blogs and organic groups at http://www.ccie.net
Received on Sat May 23 2009 - 19:41:20 ART