All things related to multicast

["João Paulo Malheiro de Barcelos" <>]

Hello there!!

I have a backbone of switches with some routers surrounding them. I
am having trouble with two default routes, and I believe it is
because the IGMP Join is being flooded more than once through the
switch.

The right way to avoid this would be using RGMP. But the switch I use
is a Catalyst 3500 (does not support RGMP), and some routers still
use the Cisco IOS 11.1(because of ATM incompatibility).
Is there any other way to avoid the IGMP join from being flooded to
all switch ports?

Thanks for the help

João Paulo Malheiro de Barcelos
CBPF - CAT