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Chassis Cluster Control Plane Interfaces

SRX Series devices in a chassis cluster use the control plane to synchronize the kernel state between the two Routing Engines. The control interfaces provide the link between the two nodes in the cluster, which are used for by devices’ control planes communicate for the session state, the configuration file, and liveliness signals across the nodes.

Example: Configuring Chassis Cluster Control Ports

This example shows how to configure chassis cluster control ports on SRX5400, SRX5600, and SRX5800 devices. You need to configure the control ports that you will use on each device to set up the control link.


Before you begin:


By default, all control ports on SRX5400, SRX5600, and SRX5800 devices are disabled. After connecting the control ports, configuring the control ports, and establishing the chassis cluster, the control link is set up.

This example configures control ports with the following FPCs and ports as the control link:

  • FPC 4, port 0

  • FPC 10, port 0



CLI Quick Configuration

To quickly configure this section of the example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI at the [edit] hierarchy level, and then enter commit from configuration mode.

Step-by-Step Procedure

To configure control ports for use as the control link for the chassis cluster:

  • Specify the control ports.


From configuration mode, confirm your configuration by entering the show chassis cluster command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.

For brevity, this show command output includes only the configuration that is relevant to this example. Any other configuration on the system has been replaced with ellipses (...).

If you are done configuring the device, enter commit from configuration mode.


Verifying the Chassis Cluster Status


Verify the chassis cluster status.


From operational mode, enter the show chassis cluster status command.


Use the show chassis cluster status command to confirm that the devices in the chassis cluster are communicating with each other. The chassis cluster is functioning properly, as one device is the primary node and the other is the secondary node.

Verifying Chassis Cluster Control Plane Statistics


Display chassis cluster control plane statistics.


From the CLI, enter the show chassis cluster control-plane statistics command:

Clearing Chassis Cluster Control Plane Statistics

To clear displayed chassis cluster control plane statistics, enter the clear chassis cluster control-plane statistics command from the CLI:

Release History Table
Starting in Junos OS Release 19.3R1, the SRX5K-RE3-128G is supported along with SRX5K-SPC3 on the SRX5000 series devices. The control interfaces ixlv0 and igb0 are used to configure SRX5K-RE3-128G.Control links control the communication between the control, and data plane and the heartbeat messages.