Configuring PIM-SM 649
every C-BSR has a chance to become the BSR, you need to configure the same
filtering policy on all C-BSRs.
Follow these steps to configure a C-RP:
n
■ When configuring a C-RP, ensure a relatively large bandwidth between this
C-RP and the other devices in the PIM-SM domain.
■ An RP can serve multiple multicast groups or all multicast groups. Only one RP
can forward multicast traffic for a multicast group at a moment.
Enabling auto-RP
Auto-RP announcement and discovery messages are respectively addressed to the
multicast group addresses 224.0.1.39 and 224.0.1.40. With auto-RP enabled on a
device, the device can receive these two types of messages and record the RP
information carried in such messages.
Follow these steps to enable auto-RP:
Configuring C-RP timers
To enable the BSR to distribute the RP-set information within the PIM-SM domain,
C-RPs must periodically send C-RP-Adv messages to the BSR. The BSR learns the
RP-set information from the received messages, and encapsulates its own IP
address together with the RP-set information in its bootstrap messages. The BSR
then floods the bootstrap messages to all PIM routers (224.0.0.13) in the network.
Each C-RP encapsulates a timeout value in its C-RP-Adv message. Upon receiving
this message, the BSR obtains this timeout value and starts a C-RP timeout timer. If
the BSR fails to hear a subsequent C-RP-Adv message from the C-RP when the
timer times out, the BSR assumes the C-RP to have expired or become
unreachable.
Follow these steps to configure C-RP timers:
To do… Use the command… Remarks
Enter system view system-view -
Enter PIM view pim -
Configure an interface to be a
C-RP
c-rp interface-type interface-number
[ group-policy acl-number | priority
priority | holdtime hold-interval |
advertisement-interval
adv-interval ] *
Optional
No C-RPs are
configured by default
Configure a legal C-RP
address range and the range
of multicast groups to be
served
crp-policy acl-number Optional
No restrictions by
default
To do… Use the command… Remarks
Enter system view system-view -
Enter PIM view pim -
Enable auto-RP auto-rp enable Optional
Disabled by default
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