 uwng switch vlan rout multicast switch vlan rout multicast 1998-11-16 switch layer-two transmiss function a switch devic interconnect multipl cabl system singl transmis system the devic cabl-system segment connect switch port exist independ collis domain multipl port switch group broadcast domain virtual multi-segment transmiss system refer virtual local-area network vlan each vlan complet unwar exist vlan rout layer-tree network function a router devic interconnect multipl network network subnet case subnet netork a campu network magnitud uw's exist singl unsubnet network segment multipl subnet essenti maintain local-of-refer isol traffic server client comput system subnet in architectur uw campu network layer-three ip subnet implement layer-two vlan multicast in ip network special rang ip network number permit ip packet address deliv multipl destin each special address design ip multicast group comput system wish particip multicast group special ip protocol igmp transmit desir local ip rout devic servic all ip rout devic member multicast group exchang group-membership rout devic connect network packet multicast group deliv similarli layer-two switch track port devic particip multicast group switch broadcast frame packet port desir integr a breed core-class devic emerg marketplac layer-two switch processor layer-three rout processor the full integr rout switch singl devic eventu enabl simpler robust topolog eventu cost-effect choic emerg permit packet-priorit packet-rout multicast function move edg perform workgroup-class devic maintain rwwatt uwaterloo 