I have a 3825 with a fast ethernet interface and a nm-a1-t3 atm/ds3 interface. Most of the traffic is multicast traffic coming from the atm/ds3 and towards the fast ethernet. There is also a fair amount of regular IP traffic going both ways over the interfaces (about 5% of the traffic). The traffic is coming from and going to a limited number of locations.
"show interface switching" shows that a lot of the traffic coming in the atm/ds3 interface and out the fast ethernet interface is switched at the process level. A guess is that this is the multicast traffic is getting switched at the process level.
"show ip interface" shows that the atm/ds3 interface has IP multicast fast switching enabled but the fast ethernet interface has it disabled. Is this why it can't fast switch between these devices?
How would I enable IP multicast fast switching on the fast ethernet interface and is there any reason not to? Thanks.