R0106-HP MSR Router Series IP Multicast Configuration Guide(V7)

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determine the RPs for different multicast group ranges based on the RP-set information. HP recommends
that you configure C-RPs on backbone routers.
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 IP address in a BSM, and floods the BSM to all 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:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter PIM view.
pim [ vpn-instance vpn-instance-name ] N/A
3. Configure a C-RP to provide
services for BIDIR-PIM.
c-rp ip-address [ advertisement-interval
adv-interval | group-policy acl-number |
holdtime hold-time | priority priority ] * bidir
By default, no C-RP is
configured.
Configuring the maximum number of BIDIR-PIM RPs
In a BIDIR-PIM domain, one DF election per RP is implemented on all PIM-enabled interfaces. To avoid
unnecessary DF elections, HP recommends not configuring multiple RPs for BIDIR-PIM.
This configuration sets a limit on the number of 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 multicast data forwarding.
The system does not delete the excess RPs. They must be deleted manually.
To configure the maximum number of BIDIR-PIM RPs:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter PIM view.
pim [ vpn-instance vpn-instance-name ] N/A
3. Configure the maximum
number of BIDIR-PIM RPs.
bidir-rp-limit limit The default setting is 6.
Configuring a BSR
You must configure a BSR if C-RPs are configured to dynamically select the RP. In a network with a static
RP, this configuration task is unnecessary.
A BIDIR-PIM domain can have only one BSR, but must have at least one C-BSR. Any router can be
configured as a C-BSR. Elected from C-BSRs, the BSR is responsible for collecting and advertising RP
information in the BIDIR-PIM domain.
Configuring a C-BSR
IMPORTANT:
Because the BSR and other devices exchange a large amount of information in the BIDIR-PIM domain,
reserve a large bandwidth between the C-BSR and other devices.