HP FlexNetwork 7500 Series Configuration Manual page 335

Step
Configure a static RP for
3.
IPv6 BIDIR-PIM.
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.
• As a best practice, 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.
An advertisement message contains a holdtime option, which defines the C-RP lifetime for the
advertising C-RP. After the BSR receives an advertisement message from a C-RP, it starts a timer for
the C-RP. If the BSR does not receive any advertisement message when the timer expires, it
considers the C-RP failed or unreachable.
To configure a C-RP:
Step
Enter system view.
1.
Enter IPv6 PIM view.
2.
Configure a C-RP to provide
3.
services for IPv6 BIDIR-PIM.
Setting the maximum number of IPv6 BIDIR-PIM RPs
In an IPv6 BIDIR-PIM domain, one DF election per RP is implemented on all IPv6 PIM-enabled
interfaces. As a best practice to avoid unnecessary DF elections, do not configure multiple RPs.
This configuration sets a limit on the number of IPv6 BIDIR-PIM RPs. If the number of RPs exceeds
the limit, excess RPs do not take effect and can be used only for DF election rather than IPv6
multicast data forwarding. The system does not delete these excess RPs. They must be deleted
manually.
To set the maximum number of RPs:
Step
Enter system view.
1.
Command
static-rp ipv6-rp-address bidir
[ acl6-number | preferred ] *
Command
system-view
ipv6 pim [ vpn-instance
vpn-instance-name ]
c-rp ipv6-address
[ advertisement-interval
adv-interval | { group-policy
acl6-number | scope scope-id } |
holdtime hold-time | priority
priority ] * bidir
Command
system-view
325
Remarks
By default, no static RPs exist.
Remarks
N/A
N/A
By default, no C-RPs exist.
Remarks
N/A