3Com 3032 Configuration Manual page 522

518 C 36: C
HAPTER ONFIGURING
Configuring the PIM-SM
Domain Boundary
Configuring the Time
Interval for Sending a
Hello Message
PIM-SM
Configure an interface to be candidate RP c-rp interface-type interface-number
Disable an interface from being candidate
RP
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.
When the scale of a network is large, the network needs to be divided into several
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
Set PIM domain boundary
Delete PIM domain boundary
By default, no PIM-SM domain boundary is configured.
After the interface starts PIM-SM protocol, it will periodically transmits a hello
message to all the PIM routers (group address is 224.0.0.13) to find PIM
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
Configure the time interval of interface
sending Hello message
Restore the default value of the time
interval of interface sending Hello
message
[ accept-policy acl-number [ priority
] ]
undo c-rp interface-type
interface-number
Command
pim bsr-boundary
undo pim bsr-boundary
Command
pim timer hello seconds
undo pim timer hello