Chassis Cluster SPC Insert

For supported firewalls configured in a chassis cluster, you can install additional services processing cards (SPCs) without incurring downtime on network. To perform such an installation, you must meet the following conditions: 

• If the chassis cluster is in active/active mode, you must transition it to active/passive mode before using this procedure. You transition the cluster to active/passive mode by making one node primary for all redundancy groups. 
• You must install SPCs of the same type in both of the firewalls in the cluster. 
• You must install the SPCs in the same slots in each chassis. 
• You must install the SPCs so that they are not the SPCs with the lowest-numbered slots in the chassis. For example, if the chassis already has two SPCs with one SPC each in slots 2 and 3, you cannot install additional SPCs in slots 0 or 1 using this procedure.
• Both of the firewalls in the cluster must be running a currently supported release of Junos OS.