stupid quesiton - multicast

From: Radioactive Frog (pbhatkoti@gmail.com)
Date: Mon May 19 2008 - 21:13:27 ART


Scenario:

PC1----------R1----s0---WAN-L2------s1------R2----------PC2

PC2 is running Multicast application on 239.1.1.1 port 16400

What will happen if I assign 239.1.1.1 port 16400 mcast address on PC1
application as well?
Assuming that M.cast routing is enabled on both routers and on each
interfaces.

1. Do we have IP address conflict in Mcast address as well?
2. When I have 2 application in the PC2 - application1 & application2
           application1: 239.1.1.1 port 16400
           application2: 239.1.1.2 port 16400
The first application works but, the second one doesn't.

But If I change it to
  application1: 239.1.1.1 port 16400
  application2: 239.1.1.9 port 16400

Both applications works!

I couldn't figure out why it won't work like class a/b/c IP address. I what
is the rule in Mcast addressing?

-frog



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