HP A6600 Configuration Manual page 133

In BIDIR-PIM, a static RP can be specified with a virtual IP address. For example, if the IP addresses of the
interfaces at the two ends of a link are 10.1.1.1/24 and 10.1.1.2/24, you can specify a virtual IP
address, like 10.1.1.100/24, for the static RP. As a result, the link becomes an RPL.
Configuring a C-RP
In a 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. HP 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 be served 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 BIDIR-PIM domain.
To do...
1. Enter system view.
2. Enter public network PIM view
or VPN instance PIM view.
3. Configure an interface to be a
C-RP for BIDIR-PIM.
When configuring a C-RP, ensure a relatively large bandwidth between this C-RP and the other devices in
the BIDIR-PIM domain.
An RP can serve multiple multicast groups or all multicast groups. Only one RP can forward multicast
traffic for a multicast group at a moment.
Enabling auto-RP
Auto-RP announcement and discovery messages are addressed to the multicast group addresses
224.0.1.39 and 224.0.1.40 respectively. With auto-RP enabled on a router, the router can receive these
two types of messages and record the RP information carried in such messages.
To do...
1. Enter system view.
2. Enter public network PIM view
or VPN instance PIM view.
3. Enable auto-RP.
Configuring C-RP timers globally
To enable the BSR to distribute the RP-set information within the BIDIR-PIM domain, C-RPs must periodically
send C-RP-Adv messages to the BSR. The BSR learns the RP-set information from the received messages,
and encapsulates its own IP address together with the RP-set information in its bootstrap messages. The
BSR then floods the bootstrap messages to all PIM routers in the network.
Each C-RP encapsulates a timeout value in its C-RP-Adv messages. After receiving a C_RP-Adv message,
the BSR obtains this timeout value and starts a C-RP timeout timer. If the BSR fails to hear a subsequent
Use the command...
system-view
pim [ vpn-instance vpn-instance-name ]
c-rp interface-type interface-number
[ group-policy acl-number | priority
priority | holdtime hold-interval |
advertisement-interval adv-interval ] *
bidir
Use the command...
system-view
pim [ vpn-instance
vpn-instance-name ]
auto-rp enable
122
Remarks
—
—
Required.
No C-RP is configured by
default.
Remarks
—
—
Required.
Disabled by default.