I have a network with IP addresses on 192.168.1.X and I just want to place my mikrotik 750 in between two switches to remove the multicasting that was occurring. I am not even sure this can be done since it is on the same subnet and IP range??
You could set up a bridge between two ports and connect them to the switches, enable the IP firewall on the bridge and drop everything all traffic to and from class D.
But what do you have against multicast traffic?
We are trying to narrow down why some PLC equipment is failing, and believe it might be due to multicast traffic.
Fair enough. If you wanted to try this, assuming an RB750 with ether1 going to the first switch and ether2 going to the second switch:
# create a bridge interface
/interface bridge
add name=bridge1
# put ports ether1 and ether2 into it
/interface bridge port
add interface=ether1 bridge=bridge1
add interface=ether2 bridge=bridge1
# turn on the IP firewall
/interface bridge settings
set use-ip-firewall=yes
# filter all multicast traffic
/ip firewall filter
add chain=forward in-interface=bridge1 dst-address=224.0.0.0/4 action=drop
I think that should do it. There may be more elegant ways.
dst-address-type=multicast? =)