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Configuring an RP
An RP can be manually configured or dynamically elected through the BSR mechanism. For a large IPv6
PIM network, static RP configuration is a tedious job. Generally, static RP configuration is just a backup
means for the dynamic RP election mechanism to enhance the robustness and operation manageability
of a multicast network.
IMPORTANT:
In an IPv6 PIM network, if both IPv6 PIM-SM and IPv6 BIDIR-PIM are enabled, do not confi
ure the same
RP to provide services for IPv6 PIM-SM and IPv6 BIDIR-PIM simultaneously to avoid IPv6 PIM routin
table
errors.
Configuring a static RP
If only one dynamic RP exists in a network, manually configuring a static RP can avoid communication
interruption because of single-point failures and avoid frequent message exchange between C-RPs and
the BSR.
In IPv6 BIDIR-PIM, a static RP can be specified with a virtual IPv6 address. 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 specify a
virtual IPv6 address, like 1001::100/64, for the static RP. As a result, the link becomes an RPL.
To make a static RP to work normally, you must perform this configuration on all routers in the IPv6
BIDIR-PIM domain and specify the same RP address.
To configure a static RP:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter IPv6 PIM view.
pim ipv6 N/A
3. Configure a static RP for IPv6
BIDIR-PIM.
static-rp ipv6-rp-address
[ acl6-number ] [ preferred ] bidir
No static RP by default
Configuring a C-RP
In an IPv6 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. H3C 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 which the C-RP is designated 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 IPv6 BIDIR-PIM domain.
When you configure a C-RP, ensure a relatively large bandwidth between this C-RP and the other devices
in the IPv6 BIDIR-PIM domain.
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