Configuring An Rp - HP 5920 series Configuration Manual

Step
4. Enable IPv6 PIM-SM.

Configuring an RP

An RP can serve multiple IPv6 multicast groups or all IPv6 multicast groups. However, only one RP can
forward IPv6 multicast traffic for an IPv6 multicast group at a moment.
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. It can also avoid waste of bandwidth due to frequent
message exchange between C-RPs and the BSR. To make the static RP operate properly, configure the
same static RP on all routers in the IPv6 PIM-SM domain.
To configure a static RP:
Step
1. Enter system view.
2. Enter IPv6 PIM view.
3. Configure a static RP for IPv6
PIM-SM.
Configuring a C-RP
In an IPv6 PIM-SM 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, and organizes the C-RP information into the RP-set
information, which is flooded throughout the entire network. Then, the other routers in the network can
determine the RPs for different IPv6 multicast group ranges based on the RP-set information. HP
recommends configuring C-RPs on backbone routers.
To enable the BSR to distribute the RP-set information in the PIM-SM 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 regards the C-RP failed or
unreachable.
To guard against C-RP spoofing, you must configure a legal C-RP address range and the multicast group
range to serve on the BSR. In addition, because every C-BSR might become the BSR, you must configure
the same filtering policy on all C-BSRs in the IPv6 PIM-SM domain.
When you configure a C-RP, reserve a relatively large bandwidth between the C-RP and the other devices
in the IPv6 PIM-SM domain.
To configure a C-RP:
Command
ipv6 pim sm
Command
system-view
ipv6 pim
static-rp ipv6-rp-address
[ acl6-number | preferred ] *
149
Remarks
By default, IPv6 PIM-SM is
disabled.
Remarks
N/A
N/A
By default, no static RP is
configured.