If one of the following conditions exist, you might need to configure multihomed machines.
Unicast routing is enabled between the interfaces and multicast routing is disabled.
Unicast routing and multicast routing are both disabled between the interfaces.
When multicast routing is disabled between interfaces, it is usually because multicast has not been deployed in the network. In that situation, broadcast is normally used for service discovery that is not DA-based and for DA discovery on the individual subnets. Broadcast is configured by setting the net.slp.isBroadcastOnly property to True.