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cluster (Chassis)


Hierarchy Level


Configure a chassis cluster. Perform the configuration under the [edit chassis cluster] configuration stanza to define chassis cluster configuration, operations, and monitoring. This configuration must specify configuration synchronization, control link recovery, heartbeat interval and threshold, network management, redundancy group, and traceoptions.



Disable automatic chassis cluster synchronization. See configuration-synchronize (Chassis Cluster).


Disable and Enable chassis cluster control-link interface on SRX1500, SRX4100, SRX4200, and SRX4600 devices. If you want to reboot any of the nodes, then you must disable the control interfaces on both nodes using the CLI configuration to ensure control link remains disabled after reboot. When control link is down, configuration change on local node will not be synchronized to the remote node.

From configuration mode, run the set chassis cluster control-interface <node0/node1> disable on node 0 or node 1 to disable the control link and to enable the control link run the delete chassis cluster control-interface <node0/node1> disable on both the nodes. If you have disabled the links using the configuration command, then the links will remain disabled even after system reboot.

From the operational mode, run the request chassis cluster control-interface <node0/node1> disable or the request chassis cluster control-interface <node0/node1> enable commands to enable or disable the control link from the local node. If you have disabled control link using the operational mode CLI commands, the links will be enabled after system reboot.


Enable automatic control link recovery option.


Enable specific chassis cluster control ports.

  • Values:

    • fpc—FPC slot number

    • port—Port number


Enable to monitor the health status of the SRX Series devices operating in chassis cluster mode. The health status between the two nodes is monitored and shared over control links and fabric links. Failover between the nodes occurs based on the heart beat status and health status of the control links and fabric links. By default, the option is disabled.


Interval between successive heartbeats (milliseconds)

  • Default: 1000

  • Range: 1000-2000


Number of consecutive missed heartbeats to indicate device failure

  • Default: 3

  • Range: 3-8


Define parameters for network management. See network-management.

redundancy-group name

Define a redundancy group. See redundancy-group (Chassis Cluster).


Number of redundant ethernet interfaces

  • Range: 1-128


Define chassis cluster redundancy process tracing operations. See traceoptions (Chassis Cluster).

The remaining statements are explained separately. See CLI Explorer.

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.

The health-monitoring option is introduced in Junos OS Release 18.4R1.

The control-interface option is introduced in Junos OS Release 20.4R1 for SRX1500 devices.