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Software Installation and Upgrade

  • Support for bootstrapping using HTTP proxy server in phone-home client (EX2300, EX2300-VC, EX3400, EX3400-VC, EX4400-24T, EX4400-48F, EX4400-48T, and EX4600)—Starting in Junos OS Release 21.1R1, when the phone-home client (PHC) receives information regarding the HTTP proxy server through either DHCP option 43 suboption 8 or DHCP option 17 suboption 8, it creates an HTTPS transparent tunnel with the proxy server. After the tunnel is established, the PHC uses the tunnel as a proxy for the phone-home server or redirect server. The phone-home client downloads the software image and configuration file through the tunnel onto the device. When bootstrapping is complete, the device reboots and the tunnel quits.

    [See Obtaining Configurations and Software Image Without User Intervention Using Phone-Home Client.]

  • Support for DHCP option 43 suboption 8 to provide proxy server information in phone-home client (EX2300, EX2300-VC, EX3400, EX3400-VC, EX4400-24T, EX4400-48F, EX4400-48T, and EX4600)—Starting in Junos OS Release 21.1R1, during the bootstrapping process, the phone-home client (PHC) can access the redirect server or the phone-home server through a proxy server. The DHCP server uses DHCP option 43 suboption 8 or DHCP option 17 suboption 8 to deliver the details of both IPv4 and IPv6 proxy servers to the PHC. The DHCP daemon running on the target switch learns about the proxy servers in the initial DHCP cycle and then populates either the phc_vendor_specific_info.xml files or the phc_v6_vendor-specific_info.xml files located in the /var/etc/ directory with the vendor-specific information.

    [See Obtaining Configurations and Software Image Without User Intervention Using Phone-Home Client.]

  • Support for phone-home client (EX4400 Virtual Chassis)—Starting in Junos OS Release 21.1R1, the phone-home client (PHC) can securely provision an EX4400 Virtual Chassis without requiring user interaction. You only need to:

    • Ensure that the Virtual Chassis members have the factory-default configuration.

    • Interconnect the member switches using dedicated or default-configured Virtual Chassis ports.

    • Connect the Virtual Chassis management port or any network port to the network.

    • Power on the Virtual Chassis members.

    The PHC automatically starts up on the Virtual Chassis and connects to the phone-home server (PHS). The PHS responds with bootstrapping information, including the Virtual Chassis topology, software image, and configuration. The PHC upgrades each Virtual Chassis member with the new image and applies the configuration, and the Virtual Chassis is ready to go.

    [See Provision a Virtual Chassis Using the Phone-Home Client.]