Replacing Spcs In An Operating Srx5400, Srx5600, Or Srx5800 Services Gateways Chassis Cluster - Juniper SRX5400 Hardware Manual

Replacing SPCs in an Operating SRX5400, SRX5600, or SRX5800 Services
Gateways Chassis Cluster
If your Services Gateway is part of an operating chassis cluster, you can replace the first-generation
SRX5K-SPC-2-10-40 SPCs with the second generation SRX5K-SPC-4-15-320 SPCs by incurring a minimum
downtime on your network. But when you are replacing the SRX5K-SPC-2-10-40 or SRX5K-SPC-4-15-320
SPCs with the SRX5K-SPC3 SPCs, there will be no downtime in your network.
NOTE: SRX5K-SPC-2-10-40 SPC is not supported on SRX5400 Services Gateway.
To replace SPCs in a services gateway that is part of a chassis cluster, it must meet the following conditions:
Each services gateway must have at least one SPC installed. The installation may warrant additional
SPCs if the number of sessions encountered is greater than the session limit of one SPC.
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.
To replace first-generation SRX5K-SPC-2-10-40 SPCs, both of the services gateways in the cluster must
be running Junos OS Release 11.4R2S1, 12.1R2, or later.
To replace second-generation SRX5K-SPC-4-15-320 SPCs, both of the services gateways in the cluster
must be running Junos OS Release 12.1X44-D10, or later.
To replace next-generation SRX5K-SPC3 SPCs, both of the services gateways in the cluster must be
running Junos OS Release 18.2R1-S1, or later.
You must install SPCs of the same type and in the same slots in both of the services gateways in the
cluster. Both services gateways in the cluster must have the same physical configuration of SPCs.
If you are replacing an existing first-generation SRX5K-SPC-2-10-40 SPC with a second-generation
SRX5K-SPC-4-15-320 SPC, you must install the new SPC so that the second-generation
SRX5K-SPC-4-15-320 SPC is the SPC with the lowest-numbered slot. For example, if the chassis has
SPCs installed in slots 2 and 3, then you must replace the SPC in slot 2 first. This ensures that the central
point (CP) functionality is performed by an SRX5K-SPC-4-15-320 SPC.
If you are adding next-generation SRX5K-SPC3 SPCs to the chassis, you must install the new SPCs so
that a next-generation SRX5K-SPC3 is the SPC in the original lowest-numbered slot. For example, if the
chassis already has two second-generation SPCs installed in slots 2 and 3, you must install SRX5K-SPC3
SPCs in slots 0 or 1. You will need to make sure that an SRX5K-SPC3 SPC is installed in the slot providing
central point (CP) functionality so that the CP functionality is performed by an SRX5K-SPC3 SPC.
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