3Com 10014299 manual By default, no interface is configured to be candidate RP

518 CHAPTER 36: CONFIGURING PIM-SM

Configure an interface to be candidate RP	c-rpinterface-type interface-number
	[ accept-policyacl-number [ priority
	] ]
Disable an interface from being candidate	undo c-rpinterface-type
RP	interface-number

By default, no interface is configured to be candidate RP.

Use pim command in system view to enter PIM view.

Generally, only one C-BSR and one C-RP are configured in the network, and usually it is the same router. Only one C-BSR can be configured for a single router. The latter configured C-BSR replaces the formerly configured C-BSR. Subscribers are recommended to configure the C-RP and C-BSR at the loopback interface of the same router. This reduces the network oscillation caused by physical interface alternating UP/DOWN, because the router loopback interface is always UP.

Configuring the PIM-SMWhen the scale of a network is large, the network needs to be divided into several Domain Boundary multicast domains. A different multicast domain can be in charge of a different RP.

After the PIM domain boundary has been configured, the BSR message and RP message do not break through this boundary, but the other PIM messages are able to pass through the domain boundary.

Make the following configuration in the interface view.

Table 591 Configure PIM-SM Domain Boundary

Operation	Command
Set PIM domain boundary	pim bsr-boundary
Delete PIM domain boundary	undo pim bsr-boundary

By default, no PIM-SM domain boundary is configured.

Configuring the Time After the interface starts PIM-SM protocol, it will periodically transmits a hello Interval for Sending a message to all the PIM routers (group address is 224.0.0.13) to find PIM

Hello Message neighbors. the query interval timer determines this time interval. If the interface receives the Hello message, it means that there are adjacent PIM routers for this interface, and this interface can add the neighbor to its interface neighbor list. If the interface does not receive a hello message from the neighbors in the interface neighbor list within a specific period, it is assumed that the neighbor must have left the multicast network. The time interval for sending a hello message can be configured according to the bandwidth and the type of the network the interface connects to.

Make the following configuration in the interface view.

Table 592 Configure the Time Interval of Interface Sending Hello Message

Operation	Command
Configure the time interval of interface	pim timer hello seconds
sending Hello message
Restore the default value of the time	undo pim timer hello
interval of interface sending Hello
message