User's Manual

Table Of Contents
523
Users Manual of CS-6306R
about a group member’s relationship from the directly-connected host, if the DR has no the routing item of the
group, the DR will map the group address to a candidate RP through the Hash algorithm. The DR then
multicasts the Join/prune message hop by hop towards the RP. Finally, the DR packages the multicast data in
the registration message and unicasts it to the RP.
50.5.2 Configuring PIM-SM
50.5.2.1 Starting up PIM-SM
Run the following command to run PIM-SM on the interface to activate the multicast function in sparse mode:
Command Purpose
ip pim-sm
Enters the interface where PIM-SM
needs to be run and activates the
PIM-SM multicast routing process in
interface configuration mode.
50.5.2.2 Configuring Static RP
If the network scale is small, you can configure the static RP to use PIM-SM. The RP configuration of all
routers in the PIM-SM domain must be same, ensuring the PIM-SM multicast route is correct.
If some router in the PIM-SM domain runs the BSR, the RP check follows the order: the static RP with
override configured is preferred. If the override is not configured for the static RP, the RP in the RP mapping
list distributed by the BSR is preferred.
Run the following command in global configuration mode:
Command Purpose
ip pim-sm rp-address rp-add
[override|acl-name]
no ip pim-sm rp-address rp-add
Configures the static RP for the local
switch.
50.5.2.3 Configuring Candidate BSR
The configuration of the candidate RP can generate the unique global BSR in the PIM-SM domain. The global
BSR collects and distributes the RP in the domain, ensuring the RP mapping is unique.
Run the following command in global configuration mode:
Command Purpose
ip pim-sm bsr-candidatetype
number [hash-mask-length] [priority]
no ip pim-sm bsr-candidate type
number
Configures the local switch as the
candidate BSR, and competes the
global BSR by learning the BSM
message.