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Configuring an RP
CAUTION:
hen both IPv6 PIM-SM and IPv6 BIDIR-PIM run on the IPv6 PIM network, do not use the same RP to
provide services for IPv6 PIM-SM and IPv6 BIDIR-PIM. Otherwise, exceptions might occur to the IPv6 PIM
routing table.
An RP can provide services for multiple or all IPv6 multicast groups. However, only one RP at a time can
forward IPv6 multicast traffic for an IPv6 multicast group.
An RP can be manually configured or dynamically elected through the BSR mechanism. For a
large-scaled IPv6 PIM network, configuring static RPs is a tedious job. Generally, static RPs are backups
for dynamic RPs to enhance the robustness and operational manageability on an IPv6 multicast network.
Configuring a static RP
If only one dynamic RP exists on a network, you can configure a static RP to avoid communication
interruption caused by single-point failures. The static RP can also avoid bandwidth waste due to frequent
message exchange between C-RPs and the BSR. The static RP configuration must be the same on all
routers in the IPv6 BIDIR-PIM domain.
In IPv6 BIDIR-PIM, a static RP can be specified with an unassigned IPv6 address. This address must be on
the same subnet with the link on which the static RP is configured. For example, if the IPv6 addresses of
the interfaces at the two ends of a link are 1001::1/64 and 1001::2/64, you can assign 1001::100/64
to the static RP. As a result, the link becomes an RPL.
To configure a static RP:
Ste
Command Remarks
1. Enter system view.
system-view N/A
2. Enter IPv6 PIM view.
ipv6 pim [ vpn-instance vpn-instance-name ] N/A
3. Configure a static RP for
IPv6 BIDIR-PIM.
static-rp ipv6-rp-address bidir [ acl6-number |
preferred ] *
By default, no static RP is
configured.
Configuring a C-RP
IMPORTANT:
• When you configure a C-RP, reserve a large bandwidth between the C-RP and other devices in the IPv6
BIDIR-PIM domain.
• HP recommends that you configure C-RPs on backbone routers.
In an IPv6 BIDIR-PIM domain, if you want a router to become the RP, you can configure the router as a
C-RP. The BSR collects the C-RP information according to the received advertisement messages from C-RPs
or the auto-RP announcements from other routers. Then, it organizes the C-RP information into the RP-set
information, which is flooded throughout the entire network. The other routers in the network can
determine the RPs for different IPv6 multicast group ranges based on the RP-set information.
To enable the BSR to distribute the RP-set information in the BIDIR-PIM domain, the C-RPs must periodically
send advertisement messages to the BSR. The BSR learns the C-RP information, encapsulates the C-RP
information and its own IPv6 address in a BSM, and floods the BSM to all IPv6 PIM routers in the domain.
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