F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

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775BEnabling PIM-SM
With PIM-SM enabled, a router sends hello messages periodically to discover PIM neighbors and
processes messages from the PIM neighbors. To deploy a PIM-SM domain, enable PIM-SM on all
non-border interfaces of the routers.
To enable PIM-SM:
Ste
p
Command Remarks
768. Enter system view.
system-view N/A
769. Enable IP multicast routing.
multicast routing-enable Disabled by default.
770. Enter interface view. interface interface-type interface-number N/A
771. Enable PIM-SM.
pim sm Disabled by default.
776BConfiguring an RP
An RP can be manually configured or dynamically elected through the BSR mechanism. For a large PIM
network, static RP configuration is a tedious job. Generally, static RP configuration is just a backup
method for the dynamic RP election mechanism to enhance the robustness and operational
manageability of a multicast network.
1614BConfiguring a static RP
If only one dynamic RP exists in a network, manually configuring a static RP can avoid communication
interruption because of single-point failures. It can also avoid frequent message exchange between C-RPs
and the BSR.
To make a static RP to work normally, you must perform this configuration on all routers in the PIM-SM
domain and specify the same RP address.
To configure a static RP:
Ste
p
Command Remarks
772. Enter system view.
system-view N/A
773. Enter public network PIM view.
pim N/A
774. Configure a static RP for
PIM-SM.
static-rp rp-address [ acl-number ]
[ preferred ]
By default, no static RP is
configured.
1615BConfiguring 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, you must 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.