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Installing SPCs in an Operating SRX3600 Services Gateway Chassis Cluster
If your SRX3600 Services Gateway is part of a chassis cluster, you can install additional SPCs in the services
gateways in the cluster without incurring downtime on your network. This process is sometimes called
in-service hardware upgrade (ISHU).
To perform such an installation, it must meet the following conditions:
•
If the chassis cluster is operating 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.
•
Both of the services gateways in the cluster must be running Junos OS Release 11.4R2S1, 12.1R2, or
later.
•
You must install SPCs of the same type in both of the services gateways 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.
If your installation does not meet these criteria, use the procedure in “Installing CFM Cards in the SRX3600
Services Gateway” on page 125 to install SPCs in your services gateway.
NOTE: During this installation procedure, you must shut down both devices, one at a time. During
the period when one device is shut down, the remaining device operates without a backup. If that
remaining device fails for any reason, you incur network downtime until you restart at least one of
the devices.
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