Juniper SRX5400 Hardware Manual page 254

NOTE: After you commit the configuration, the following error message appears:
Connection to node1 has been broken error:remote unlock-configuration failed on node1 due
to control plane communication break.
Ignore the error message.
6. Upgrade the Junos OS release on the secondary node from 12.3X48-D10 to 15.1X49-D10.
admin@cluster#request system software add <location of package/junos filename> no-validate no-copy
7. Power on the secondary node.
admin@cluster#request system reboot
See:
Powering On an AC-Powered SRX5400 Services Gateway on page 202
Powering On a DC-Powered SRX5400 Services Gateway on page 206
Powering On an AC-Powered SRX5600 Services Gateway
Powering On a DC-Powered SRX5600 Services Gateway
Powering On an AC-Powered SRX5800 Services Gateway
Powering On a DC-Powered SRX5800 Services Gateway
8. Perform the hardware upgrade on the secondary node by replacing SCB2 with SCB3, IOC2 with IOC3,
and the existing midplane with the enhanced midplane.
Following these steps while upgrading the SCB:
To upgrade the Routing Engine on the secondary node:
a. Before powering off the secondary node, copy the configuration information to a USB device.
b. Replace RE1 with RE2 and upgrade the Junos OS on RE2.
c. Upload the configuration to RE2 from the USB device.
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