Users Guide

Command History
This guide is platform-specic. 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 Description
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 ExaScale.
Usage Information
By default, when you enable PIM-SM snooping, a switch oods all multicast trac to the PIM designated
router (DR), including unnecessary multicast packets. To minimize the trac 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 trac, 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 trac is transmitted on the egress port towards the PIM DR if the port is not the incoming
interface.
• Multicast trac for an unknown group is sent on the port towards the PIM DR. When DR ooding is
disabled, multicast trac for an unknown group is dropped.
show ip pim bsr-router
View information on the Bootstrap router.
S4820T
Syntax
show ip pim [vrf vrf-name] bsr-router
Parameters
vrf vrf-name (OPTIONAL) Enter the keyword vrf followed by the name of the VRF to congure
this setting on VRF.
NOTE: Applies to specic VRF if input is provided, else applies to Default
VRF.
Command Modes
• EXEC
• EXEC Privilege
Command History
This guide is platform-specic. 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.
PIM-Sparse Mode (PIM-SM)
1175