10G Core Routing Switch User Manual
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When configuring RP, if the range of the served multicast group is not specified, the RP will serve all multicast groups.
Otherwise, the range of the served multicast group is the multicast group in the specified range. It is suggested to
configure Candidate RP on the backbone router.
Configuring Static RP
Static RP serves as the backup of dynamic RP, so as to improve network robusticity.
Beginning in privileged EXEC mode, follow these steps to configure static RP.
Command
Purpose
Step 1
config terminal
Enter global configuration mode.
Step 2
ip pim rp-address set
ip-address
Configure static RP
Step 3
exit
Return to privileged EXEC mode.
Step 4
show ip pim rp
Verify your entries.
Step 5
write
(Optional) Save your entries in the configuration file.
If static RP is in use, all routers in the PIM domain must adopt the same configuration. If the configured static RP
address is the interface address of the local router whose state is UP, the router will function as the static RP. It is
unnecessary to enable PIM on the interface that functions as static RP. When the RP elected from BSR mechanism is
valid, static RP does not work.
Modifying the PIM Router-Query Message Interval
PIM routers and multilayer switches send PIM router-query messages to find which device will be the DR for each LAN
segment (subnet). The DR is responsible for sending IGMP host-query messages to all hosts on the directly connected
LAN.
With PIM SM operation, the DR is the device that is directly connected to the multicast source. It sends PIM register
messages to notify the RP that multicast traffic from a source needs to be forwarded down the shared tree. In this case,
the DR is the device with the highest IP address.
Beginning in privileged EXEC mode, follow these steps to modify the router-query message interval. This procedure is
optional.
Command
Purpose
Step 1
config terminal
Enter global configuration mode.
Step 2
ip pim query-interval
seconds
Configure the frequency at which the switch sends
PIM router-query messages.
The default is 30 seconds. The range is 1 to 65535.
Step 3
exit
Return to privileged EXEC mode.
Step 4
show ip igmp interface
interface-id
Verify your entries.
Step 5
write
(Optional) Save your entries in the configuration file.