Users Guide
Version Description
8.3.12.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
Usage Information This command is applicable to last hop routers on the shared tree towards the rendezvous point (RP).
no ip pim snooping dr-ood
Disable the ooding of multicast packets to the PIM designated router.
Syntax
no ip pim snooping dr-flood
To re-enable the ooding 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-specic. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.4.1.0 Introduced on the E-Series.
Usage Information
By default, when you enable PIM-SM snooping, a switch oods all multicast trac to the PIM designated
router (DR), including unnecessary multicast packets. To minimize the trac sent over the network to the
designated router, you can disable designated-router flooding.
When designated-router ooding is disabled, PIM-SM snooping only forwards the multicast trac, 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 ood is not disabled (default setting):
• Multicast trac is transmitted on the egress port towards the PIM DR if the port is not the incoming
interface.
• Multicast trac for an unknown group is sent on the port towards the PIM DR. When DR ooding is
disabled, multicast trac for an unknown group is dropped.
1224
PIM-Sparse Mode (PIM-SM)