R21xx-HP FlexFabric 11900 IP Multicast Configuration Guide

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Task at a
g
lance
(Optional.) Configuring PIM-DM graft retry timer
(Optional.) Configuring common PIM features
Configuration prerequisites
Before you configure PIM-DM, configure a unicast routing protocol so that all devices in the domain are
interoperable at the network layer
Enabling PIM-DM
Enable IP multicast routing before you configure PIM.
With PIM-DM enabled on interfaces, routers can establish PIM neighbor relationship and process PIM
messages from their PIM neighbors. When you deploy a PIM-DM domain, enable PIM-DM on all
non-border interfaces of the routers.
IMPORTANT:
A
ll the interfaces on a device must operate in the same PIM mode.
To enable PIM-DM:
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-DM.
pim dm By default, PIM-DM is disabled.
Enabling the state refresh feature
Pruned interfaces resume multicast forwarding when the pruned state times out. To prevent this, the router
with the multicast source attached periodically sends an (S, G) state refresh message, which is forwarded
hop by hop along the initial multicast flooding path of the PIM-DM domain, to refresh the prune timer
state of all the routers on the path. A shared-media subnet can have the state refresh feature only if the
state refresh feature is enabled on all PIM routers on the subnet.
To enable the state refresh feature on all routers in PIM-DM domain:
Ste
p
Command Remarks
1. Enter system view.
system-view
N/A