Skip to content

Support



Juniper was the first North American IP routing vendor to achieve the prestigious TL 9000 certification by the Quality of Excellence for Suppliers of Telecommunications (QuEST) Forum in the router category, for design, development, provision and service and support.



What is J-Care?

It's the world-class service and support that you expect from a company that delivers the industry's best infrastructure and security products. With J-Care, you now have the confidence knowing that Juniper will do our part to keep you on top of the world!


Recovering from a Failed Software Upgrade on an EX-series Switch

If the JUNOS software loads but the CLI is not working for any reason, or if the switch has no software installed, you can use this recovery installation procedure to install the JUNOS software.

If there is already a JUNOS image on the system, you can either install the new JUNOS package in a separate partition and both JUNOS images will remain on the system, or you can wipe the disk clean before the new installation proceeds.

To perform a recovery installation:

  1. Power on the switch. The loader script starts.
  2. After the Loading /boot/defaults/loader.conf displays, you are promptedwith:

    Hit [Enter] to boot immediately, or space bar for command prompt.

    Hit the space bar to enter the manual loader. The loader> prompt displays.

  3. Enter the following command:

    install [––format] source

    Where:

    • Include the ––format option if you want to wipe the internal disk before installing the software package. If you do not include this option, the system installs the new JUNOS software package in a different partition from any existing JUNOS software package.
    • source represents the name and location of the JUNOS software package either on a server on the network or as a file on an external USB drive:
      • Network address of the server and the path on the server. For example, tftp://192.17.1.28/junos/jinstall-ex-9.0R1-domestic.tgz
      • The JUNOS package on a USB device is commonly stored in the root drive as the only file. For example, file:///jinstall-ex-9.0R1-domestic.tgz
  4. The installation proceeds as normal and ends with a login prompt.

The system disk has two partitions and can have a different software package installed in each partition. You can manually reset the system to boot from the other partition. You can set the system to boot from the other partition on the next reboot only, or make the change permanent so that it will boot from the other partition on all subsequent reboots.

To specify reboot from the partition that is not currently active for the next reboot only, issue the following commands from within the loader:

  1. set currdev=disk0Sdisk-number:, where disk-number indicates the partition number, either 1 or 2.
  2. boot

To reset the partition that is designated the active partition, exit the CLI and enter the following commands from the UNIX prompt:

  1. # echo "adisk-number" |fdisk –f –/dev/da0, where disk-number indicates the partition number, either 1 or 2.
  2. # reboot