Dell C1048P Port Extender Networking Command-Line Reference Guide for the C900 - Page 1588

Even though the FHR nodes act as RPs, these nodes still send Register encap messages to themselves and expect to receive a Register stop message (for Anycast RP support). As a result, if the DLT timer expires, SG is not deleted until the register state is deleted in the node. This register state expires 210 seconds after the last Null register is received. no ip pim snooping dr-flood Disable the flooding of multicast packets to the PIM designated router. C9000 Series Syntax no ip pim snooping dr-flood To re-enable the flooding of multicast packets to the PIM designated router, use the ip pim snooping dr-flood command. Defaults Enabled. Command Modes CONFIGURATION Command History This guide is platform-specific. For command information about other platforms, refer to the relevant Dell Networking OS Command Line Reference Guide. The following is a list of the Dell Networking OS version history for this command. Version 9.9(0.0) 9.5(0.1) 8.3.19.0 8.3.12.0 8.4.1.0 Description Introduced on the C9010. Introduced on the Z9500. Introduced on the S4820T. Introduced on the S4810. Introduced on the E-Series ExaScale. Usage Information 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. 1588 PIM-Sparse Mode (PIM-SM)