CRS125, How to disable communication between two switched ports?

Hello everbody!

I have a CRS125 switch with two multcast server and eight multicast clients on ten switched ports. The problem is that if multicast packets can travel between the two server, they crash. (probably igmp query issues). So I need to drop the packets between port 1 and port 2 on the switch. I tried to separate port 2 from the switch and put them together with a bridge and use bridge/filter function, but the small CPU can’t handle this. I can’t access the servers, so I need to do everything “inside” the switch.

Thanks for the help.

Lajos