Command Line Interface
11571553-KDU 137 365 Uen D 2006-06-16
7.27.41 ip pim hello-interval
This command sets the interval at which periodic hellos are sent out on all
interfaces. Use the no form to restore the default setting.
Syntax
ip pim hello-interval <interval-value>
no ip pim hello-interval
interval-value - Interval at which periodic hellos are sent out PIM
interfaces. (Range: 1-65535 seconds)
Default Setting
30 seconds
Command Mode
Interface Configuration (VLAN)
Command Usage
• PIM-SM routers send periodic hello messages to inform neighboring
routers of their presence, and to determine which router for each LAN
segment will serve as the Designated Router (DR).
• When a router is booted or first configured for PIM-SM, it sends an initial
hello message, and then sets its Hello timer to the configured value. If a
router does not hear from a neighbor for the period specified by the
hello-holdtime (set a period of 3.5 times the hello timer by default), that
neighbor is dropped. This hold time is included in each hello message
received from a neighbor. Also note that hello messages also contain
the DR priority of the router sending the message.
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