3Com S7902E, Configuration Manual

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1-15
Task Remarks
Configuring State-Refresh Parameters Optional
Configuring PIM-DM Graft Retry Period Optional
Configuring PIM Common Features Optional
Configuration Prerequisites
Before configuring PIM-DM, complete the following task:
z
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:
z
The interval between state-refresh messages
z
Minimum time to wait before receiving a new refresh message
z
TTL value of state-refresh messages
z
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 in the public instance
Follow these steps to enable PIM-DM globally in the public instance:
To do... Use the command... Remarks
Enter system view system-view —
Enable IP multicast routing multicast routing-enable
Required
Disable by default
Enter interface view
interface interface-type
interface-number
—
Enable PIM-DM pim dm
Required
Disabled by default
Enabling PIM-DM in a VPN instance
Follow these steps to enable PIM-DM in a VPN instance:
To do... Use the command... Description
Enter system view system-view —
Create a VPN instance and
enter VPN instance view ip vpn-instance
vpn-instance-name
—
Configure a route-distinguisher
(RD) for the VPN instance
route-distinguisher
route-distinguisher
Required
Not configured by default