HP 4800G Series Configuration Manual page 831

Configuration Prerequisites
Before configuring PIM-DM, complete the following task:
Configure any unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
Before configuring PIM-DM, prepare the following data:
The interval between state-refresh messages
Minimum time to wait before receiving a new refresh message
TTL value of state-refresh messages
Graft retry period
Enabling PIM-DM
With PIM-DM enabled, a router sends hello messages periodically to discover PIM neighbors and
processes messages from the PIM neighbors. When deploying a PIM-DM domain, you are
recommended to enable PIM-DM on all non-border interfaces of the routers.
Enabling PIM-DM globally
Follow these steps to enable PIM-DM globally:
To do...
Enter system view
Enable IP multicast routing
Enter interface view
Enable PIM-DM
All the interfaces on the same device must work in the same PIM mode.
PIM-DM does not work with multicast groups in the SSM group grange.
For details about the multicast routing-enable command, see Multicast Routing and Forwarding
Commands in the IP Multicast Volume.
Enabling State-Refresh Capability
A multi-access subnet can have the state-refresh capability only if the state-refresh capability is enabled
on all PIM routers on the subnet.
Use the command...
system-view
multicast routing-enable
interface interface-type
interface-number
pim dm
1-15
Remarks
—
Required
Disable by default
—
Required
Disabled by default