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darren koh
Posts: 7
Registered: ‎09-20-2010
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EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

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

Distinguished Expert
spuluka
Posts: 2,811
Registered: ‎03-30-2009
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Re: EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

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

Steve Puluka BSEET
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Expert Network Security Engineer - UPMC Pittsburgh, PA
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Trusted Contributor
michael.saw
Posts: 1,048
Registered: ‎09-26-2011
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Re: EX swtich upgrading to 10.4R3, unable to upgrade and prompt to loader> command

Thanks for the tip!
Thanks!

Michael
JNCIA-JUNOS, JNCIS-ENT/SEC, JNCIP-ENT
(CCNA, ACMP, ACFE, CISE)
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