heartbeat-interval
Syntax
heartbeat-interval milliseconds;
Hierarchy Level
[edit chassis cluster]
Description
Set the interval between the periodic signals broadcast to the devices in a chassis cluster to indicate that the active node is operational.
The heartbeat-interval option works in combination
with the heartbeat-threshold option to define the wait
time before failover is triggered in a chassis cluster. The default
values of these options produce a wait time of 3 seconds. In a large
configuration approaching full capacity on an SRX5400 or SRX5600 or
SRX5800 device, however, we recommend that you increase the failover
wait time to 5 seconds.
For example, a heartbeat-threshold of 3 and a heartbeat-interval of 1000 milliseconds result in a total wait
of 3 seconds before failover is triggered. To increase this wait to
5 seconds, you could increase the heartbeat-threshold,
the heartbeat-interval, or both. A heartbeat-threshold of 5 and a heartbeat-interval of 1000 milliseconds would
yield a wait time of 5 seconds. Setting the heartbeat-threshold to 4 and the heartbeat-interval to 1250 milliseconds
would also yield a wait time of 5 seconds.
In a chassis cluster scaling environment, the heartbeat-threshold must always be set to 8.
Options
milliseconds—Time interval between any two heartbeat messages.
Range: 1000 through 2000 milliseconds
Default: 1000 milliseconds
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 9. Statement updated in Junos OS Release 10.4.