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Software Installation and Upgrade

  • Support of the PXE boot method (SRX1500, SRX4100, SRX4200, SRX4600, SRX5400, SRX5600, and SRX5800)—Starting in Junos OS Release 21.2R1, we support the Preboot Execution Environment (PXE) boot method. With a PXE boot server, you can prepare an environment to boot devices by using a network interface that is independent of available data storage devices or installed operating systems. A client-enabled system uses a PXE boot to load an OS from a remote server and boot from it. PXE boot uses the standard protocols UDP/IP, Trivial File Transfer Protocol (TFTP), and BOOTP to transfer the image.

    [See Upgrading the Personality of a Device by Using a PXE Boot Server.]