HP A6600 Configuration Manual page 123

for the dynamic RP election mechanism to enhance the robustness and operational manageability of a
multicast network.
Configuring a static RP
If only one dynamic RP exists in a network, manually configuring a static RP can avoid communication
interruption due to single-point failures and avoid frequent message exchange between C-RPs and the
BSR.
To do...
1. Enter system view.
2. Enter public network PIM view
or VPN instance PIM view.
3. Configure a static RP for
PIM-SM.
To enable a static RP to work normally, you must perform this configuration on all the routers in the
PIM-SM domain and specify the same RP address.
Configuring a C-RP
In a PIM-SM 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 you to 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 can become the BSR, you must configure the
same filtering policy on all C-BSRs in the PIM-SM domain.
When configuring a C-RP, ensure a relatively large bandwidth between this C-RP and the other devices in
the PIM-SM 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.
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 PIM-SM.
4. Configure a legal C-RP
address range and the range
of multicast groups to be
served.
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.
Use the command...
system-view
pim [ vpn-instance
vpn-instance-name ]
static-rp rp-address [ acl-number ]
[ preferred ]
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 ] *
crp-policy acl-number
112
Remarks
—
—
Required.
No static RP by default.
Remarks
—
—
Required.
No C-RPs are configured by
default.
Optional.
No restrictions by default.