Pim Timer Hello - 3Com 8807 Command Reference Manual

Use the undo pim sm command to disable the PIM-SM protocol.
By default, PIM-SM is disabled.
Users need to configure the PIM-SM protocol on each interface. Generally, the
PIM-SM protocol needs to be enabled on each interface.
Related command: multicast routing-enable.
Example
# Enable PIM-SM on VLAN-interface10.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800]interface vlan-interface 10
[3Com-Vlan-interface10] pim sm

pim timer hello

Syntax
pim timer hello seconds
undo pim timer hello
View
Interface view
Parameter
seconds: Time interval for a port to send Hello packets, in the range of 1 to 18,000
(in seconds). By default, the time interval is 30 seconds.
Description
Use the pim timer hello command to configure the time interval for a port to
send Hello packets.
Use the undo pim timer hello command to restore the default time interval.
After the protocol independent multicast-sparse mode (PIM-SM) protocol is
enabled for a port, a switch sends Hello packets periodically to all network devices
supporting protocol independent multicast (PIM) to find its neighbors. If a port
receives the Hello packets, it indicates the port has a neighbor network device
supporting PIM, and the port adds the neighbor to its port neighbor list. If a port
does not receive the Hello packets from the existing neighbors in its neighbor list
in the specified time, the system assumes the neighbor has left the multicast
group.
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You must enable a PIM protocol (PIM-DM or PIM-SM) in interface view before
you can proceed with this configuration.
When you configure the time interval for a port to send Hello packets, the PIM
neighbor hold-time value is automatically set to 3.5 times the Hello interval.
Therefore you need not configure the PIM neighbor hold-time separately.
PIM Configuration Commands 631