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EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

  • 1.  EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

    Posted 06-05-2011 19:47
      |   view attached

    Hi All expert,

     

    I have try to upgrade my ex4200 to 10.4R3, but i forget to upgrade the jloader firmware and leading me to loader> prompt.

     

    I am not able to do anything in this prompt, try alot of method still no luck.

     

    Below is the prompt:

     

    U-Boot 1.1.6 (May 19 2010 - 05:03:13)

     

    Board: EX4200-24T 3.6
    EPLD:  Version 6.0 (0x85)
    DRAM:  Initializing (1024 MB)
    FLASH: 8 MB
    USB:   scanning bus for devices... 2 USB Device(s) found
           scanning bus for storage devices... 1 Storage Device(s) found

     

    ELF file is 32 bit
    Consoles: U-Boot console 

     

    FreeBSD/PowerPC U-Boot bootstrap loader, Revision 2.2
    (builder@shoth.juniper.net, Wed May 19 06:04:27 UTC 2010)
    Memory: 1024MB
    \
    can't load '/kernel'
    can't load '/kernel.old'

     

    Type '?' for a list of commands, 'help' for more detailed help.
    loader> boot
    can't load '/kernel'
    can't load '/kernel.old'
    no bootable kernel
    loader>

     

    Thanks for the great help

    Darren Koh

    Attachment(s)

    txt
    JloaderBootUp.txt   656 B 1 version


  • 2.  RE: EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command
    Best Answer

    Posted 06-06-2011 04:15

    These two procedures can help in some cases where there is no boot to reinstall Junos. 


    Recovering from a failed upgrade

    http://kb.juniper.net/InfoCenter/index?page=content&id=KB10386

     

    Installing bootloader from tftp

    http://kb.juniper.net/InfoCenter/index?page=content&id=KB11752



  • 3.  RE: EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

    Posted 12-12-2011 01:30
    Thanks for the tip!