heartbeat-threshold
Syntax
heartbeat-threshold number;
Hierarchy Level
[edit chassis cluster]
Description
Set the number of consecutive missed heartbeat signals that a device in a chassis cluster must exceed to trigger failover of the active node.
The heartbeat-threshold option works in combination
with the heartbeat-interval 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.
Options
number—Number of consecutive missed heartbeats.
Range: 3 through 8
Default: 3
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 9.0. Statement updated in Junos OS Release 10.4.