Dell Force10 S4820T FTOS Command Reference Guide - Page 1153

Defaults Command Modes Command History Usage Information Related Commands Enabled. CONFIGURATION Version 8.3.19.0 Version 8.3.12.0 Version 8.4.1.1 Introduced on S4820T Introduced on the S4810. Introduced on E-Series ExaScale By default, when you enable PIM-SM snooping, a switch floods all multicast traffic to the PIM designated router (DR), including unnecessary multicast packets. To minimize the traffic sent over the network to the designated router, you can disable designated-router flooding. When designated-router flooding is disabled, PIM-SM snooping only forwards the multicast traffic, which belongs to a multicast group for which the switch receives a join request, on the port connected towards the designated router. If the PIM DR flood is not disabled (default setting): • Multicast traffic is transmitted on the egress port towards the PIM DR if the port is not the incoming interface. • Multicast traffic for an unknown group is sent on the port towards the PIM DR. When DR flooding is disabled, multicast traffic for an unknown group is dropped. ip pim snooping Enable PIM-SM snooping. show ip pim bsr-router c e s View information on the Bootstrap router. Syntax Command Modes Command History Example show ip pim bsr-router EXEC EXEC Privilege Version 8.3.19.0 Version 8.3.7.0 Version 8.1.1.0 Version 7.8.1.0 Introduced on S4820T Introduced on S4810 Introduced on E-Series ExaScale Introduced on S-Series E600-7-rpm0#show ip pim bsr-router PIMv2 Bootstrap information PIM-Sparse Mode (PIM-SM) | 1153