After wiring the two services routers or two services gateways together as described in Hardware Setup for J-series Services Routers or Hardware Setup for SRX-series Services Gateways, you use CLI operational mode commands to enable chassis clustering by assigning a cluster ID and node ID on each chassis in the cluster. The cluster ID is the same on both nodes. To do this, you connect to the console port on the device that will be the primary, give it a node ID, and identify the cluster it will belong to, then reboot the system. You then connect the console port to the other device, give it a node ID, and assign it the same cluster ID you gave to the first node, then reboot the system. In both instances, you can cause the system to boot automatically by including the reboot parameter in the CLI command line. (For further explanation of primary and secondary nodes, see Understanding Redundancy Groups.)
Figure 68 shows how the PIM slots are numbered on two nodes in a services router cluster. Figure 69 shows how the SPC slots are numbered on two nodes in a services gateway cluster.
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