The set protocols pim interface hello holdtime command is used to configure the randomized triggered delay of PIM Hello messages (in seconds) per VLAN interface.
set protocols pims interface <interface-name> hello holdtime < interval>
Specifies a L3 VLAN interface. The value is a string.
hello holdtime < interval>
Specifies the maximum delay for triggering Hello messages. The value is an integer that ranges from 3 to 180 in seconds.
To avoid the conflict caused by multiple PIM devices sending Hello message at the same time, the PIM device automatically selects a random number smaller than the configured value as the delay. When detecting Hello messages in the network, the PIM device sends Hello message after the delay.
When PIM is enabled on an interface or a router first starts, the Hello Timer of that interface is set to a random value between 0 and hello-triggered-delay. This prevents synchronization of Hello messages if multiple routers are powered on simultaneously. After the initial randomized interval, Hello messages must be sent every hello-period seconds.
- Set the randomized triggered delay of PIM Hello messages to 10 seconds on vlan-2.