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CAUTION:
You must perform static RP configuration on all routers in the PIM-SM domain and specify the same RP
address.
NOTE:
In BIDIR-PIM, a static RP can be specified with a virtual IP address. For example, if the IP addresses of
the interfaces at the two ends of a link are 10.1.1.1/24 and 10.1.1.2/24, specify a virtual IP address,
like 10.1.1.100/24, for the static RP. As a result, the link becomes an RPL.
Configuring a C-RP
In a BIDIR-PIM domain, you can configure routers that intend to become the RP as C-RPs. The BSR
collects the C-RP information by receiving the C-RP-Adv messages from C-RPs or auto-RP announcements
from other routers and organizes the information into an RP-set, which is flooded throughout the entire
network. Then, the other routers in the network calculate the mappings between specific group ranges
and the corresponding RPs based on the RP-set. HP recommends that you configure C-RPs on backbone
routers.
To guard against C-RP spoofing, configure a legal C-RP address range and the range of multicast groups
to be served on the BSR. In addition, because every C-BSR has a chance to become the BSR, you must
configure the same filtering policy on all C-BSRs in the BIDIR-PIM domain.
Follow these steps to configure a C-RP:
To do... Use the command... Remarks
Enter system view system-view —
Enter public network PIM view
or VPN instance PIM view
pim [ vpn-instance vpn-instance-name ] —
Configure an interface to be a
C-RP for BIDIR-PIM
c-rp interface-type interface-number [
group-policy acl-number | priority priority
| holdtime hold-interval | advertisement-
interval adv-interval ] * bidir
Required
No C-RP is configured by
default.
NOTE:
• When configuring a C-RP, ensure a relatively large bandwidth between this C-RP and the other
devices in the BIDIR-PIM 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 addressed to the multicast group addresses
224.0.1.39 and 224.0.1.40 respectively. 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:
To do... Use the command... Remarks
Enter system view system-view —
Enter public network PIM view
or VPN instance PIM view
pim [ vpn-instance vpn-instance-name
]
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