Logical systems: Separate multicast snooping domains for different logical systems

Support for multicast, PIM, and IGMP snooping on named logical systems. What this means is that multicast traffic specific to one logical system does not have to flood the entire bridge domain. This enhancement extends all the available snooping functionality in the default logical system (including separate routing tables, routing instances, policies, and interface configurations) to all of the named logical systems on the router. Likewise, the output of show commands is restricted to data from the named logical system only. The primary logical system, however, can view the states of any or all named logical systems configured on the device. For service providers, the main benefits of this change are the ability to provide customers with distinct multicast domains for snooping and the ability to simplify multicast snooping testing by collapsing multiple routers onto a single device via logical systems. Multicast snooping per named logical systems also extends to MC-LAG in logical systems that were introduced Multicast snooping in named logical systems does not support unified ISSU. We recommend that, prior to performing unified ISSU, the provider remove all IGMP-snooping specific configurations. Graceful Routing Engine switchover (GRES) is not affected by this change. IGMP snooping support for P2MP in VPLS for logical systems applies where such configurations are already valid.