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Configuring PIM-DM 189
Enabling PIM-DM
PIM-DM needs to be enabled in the configuration of all interfaces.
After PIM-DM is enabled on an interface, it will send PIM Hello messages
periodically, and process protocol packets sent by PIM neighbors.
Perform the following configuration in VLAN interface view.
3Com recommends that you configure PIM-DM on all interfaces. This
configuration is effective only after the multicast routing is enabled in system view.
Once you enable PIM-DM on an interface, PIM-SM cannot be enabled on the
same interface and vice versa.
Entering PIM View
Global parameters of PIM should be configured in PIM view.
Perform the following configuration in system view.
Use the undo pim command to clear the configuration in PIM view, and to return
to system view.
Configuring the Interface Hello Message Interval
After PIM is enabled on an interface, it will send Hello messages periodically. The
interval at which Hello messages are sent can be modified according to the
bandwidth and type of the network connected to the interface.
Perform the following configuration in VLAN interface view.
The default interval is 30 seconds. You can configure the value according to
different network environments. Generally, this parameter does not need to be
modified.
This configuration can be performed only after PIM (PIM-DM or PIM-SM) is
enabled in VLAN interface view.
Table 25 Enable PIM-DM
Operation Command
Enable PIM-DM on an interface pim dm
Disable PIM-DM on an interface undo pim dm
Table 26 Entering PIM View
Operation Command
Enter PIM view pim
Return to system view undo pim
Table 27 Configure Hello Message Interval on an Interface
Operation Command
Configure the hello message interval on an
interface
pim timer hello seconds
Restore the interval to the default value undo pim timer hello