R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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IMPORTANT:
A
ll the interfaces on the same router must operate in the same PIM mode.
To enable PIM-SM:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enable IP multicast routing.
multicast routing-enable
By default, IP multicast routing is
disabled.
3. Enter interface view.
interface interface-type
interface-number
N/A
4. Enable PIM-SM.
pim sm By default, PIM-SM is disabled.
Configuring an RP
An RP can provide services for multiple multicast groups. However, only one RP can forward multicast
traffic for a multicast group at a moment.
An RP can be manually configured or dynamically elected through the BSR mechanism. For a
large-scaled 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 a 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. The static RP configuration must be the same on all
routers in the PIM-SM domain.
To configure a static RP:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A
2. Enter PIM view.
pim N/A
3. Configure a static RP for
PIM-SM.
static-rp rp-address [ acl-number |
preferred ] *
By default, no static RP is
configured.
Configuring a C-RP
IMPORTANT:
W
hen you configure a C-RP, reserve a relatively large bandwidth between the C-RP and the other devices
in the PIM-SM domain.
In a 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