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set chassis cluster cluster-id node node-number reboot



Sets the chassis cluster identifier (ID) and node ID on each device, and reboots the devices to enable clustering. The system uses the chassis cluster ID and chassis cluster node ID to apply the correct configuration for each node (for example, when you use the apply-groups command to configure the chassis cluster management interface). The chassis cluster ID and node ID statements are written to the EPROM, and the statements take effect when the system is rebooted.

Setting a cluster ID to 0 is equivalent to disabling a cluster. A cluster ID greater than 15 can only be set when the fabric and control link interfaces are connected back-to-back.


If you have a cluster set up and running with an earlier release of Junos OS, you can upgrade to Junos OS Release 12.1X45-D10 or later and re-create a cluster with cluster IDs greater than 16. If for any reason you decide to revert to the previous version of Junos OS that did not support extended cluster IDs, the system comes up with standalone devices after you reboot. If the cluster ID set is less than 16 and you roll back to a previous release, the system comes back with the previous setup.


cluster-id cluster-id

Identifies the cluster within the Layer 2 domain.

  • Range: 0 through 255

node node

Identifies a node within a cluster.

  • Range: 0 through 1


reboot the specified devices to configure the chassis cluster.

Required Privilege Level


Output Fields

When you enter this command, you are provided feedback on the status of your request.

Release Information

Support for extended cluster identifiers (more than 15 identifiers) added in Junos OS Release 12.1X45-D10.