H3C Technologies H3C S12500 Series Switches - Manual (Page 141)

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Configuring PIM-DM
PIM-DM configuration task list
Task Remarks
Enabling PIM-DM Required.
Enabling state-refresh capability Optional.
Configuring state-refresh parameters Optional.
Configuring PIM-DM graft retry period Optional.
Configuring PIM common features Optional.
Configuration prerequisites
Before you configure PIM-DM, complete the following tasks:
• Configure any unicast routing protocol so that all devices in the domain are interoperable at the
network layer.
• Determine the interval between state-refresh messages.
• Determine the minimum time to wait before receiving a new refresh message.
• Determine the TTL value of state-refresh messages.
• Determine the 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 you deploy a PIM-DM domain, enable PIM-DM on
all non-border interfaces of the routers.
Configuration guidelines
• When the system is operating in standard mode, you must configure a reserved VLAN before you
configure PIM-DM for a VPN instance. For more information about the system operating mode, see
Fundamentals Configuration Guide. For more information about a reserved VLAN, see MPLS
Configuration Guide and MPLS Command Reference.
• All the interfaces of a switch that are in the same VPN instance must share the same PIM mode.
• PIM-DM does not work with multicast groups in the SSM group range.
Configuration procedure
To enable PIM-DM globally on the public network:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enable IP multicast routing. multicast routing-enable Disable by default.