Switching

*****

can't load 'kernel'

Type '?' for a list of commands, 'help' for more detailed help.

loader>

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My EX's are in this state and none of the online recovery methods are working.  I can get to u-boot and loader prompts.  The USB and TFTP options of install command fail.

Can someone please chime in on any recovery tips?  Thank you in advance.

Can you send the failure output? Honestly it sounds like bad hardware.

*****

loader> install --format tftp://192.168.6.53/junos-arm-32-15.1X53-D56.tgz

ETH LINK UP: 1000FD

cannot load kernel from package (error 2)

loader>

*****

using tftp.  with u-boot prompt, i can get the EX to pull down the image but it doesn't do anything after the DL.

Can you send the output of your tftp upgrade attempt?

This is procedure:

https://kb.juniper.net/InfoCenter/index?page=content&id=KB20643

loader> set ipaddr=192.168.6.150

loader> set netmask=255.255.255.0

loader> set serverip=192.168.6.53

loader> install --format tftp://192.168.6.53/junos-arm-32-15.1X53-D56.tgz

ETH LINK UP: 1000FD

cannot load kernel from package (error 2)

can't get to single user mode either =\

loader> boot -s

can't load 'kernel'

no bootable kernel

loader>

can't get to single user mode either =\

This is known issue (I believe) with all newer ELS based EX switches outside of EX9200.

This is known issue (I believe) with all newer ELS based EX switches outside of EX9200.

So the only resolution is RMA?

single-user mode is different on EX3400 and EX2300; please see following KB: https://kb.juniper.net/InfoCenter/index?page=content&id=KB31403&actp=METADATA

aren't you able to boot from the OAM partition?

I don't know if the following page helps you: http://nextheader.net/2017/02/23/snapshots-on-ex2300ex3400/

I can only get to the UBoot and Loader prompts.

=(

You are trying with the wrong file.

Before, same code filename was working for USB or TFTP proceedure.

Now, for each proceedure there is another firmware filename. Please see the following:

https://www.juniper.net/documentation/en_US/junos/topics/concept/understanding-junos-freebsd-package-naming-ex2300-ex3400.html

Initially I was trying with junos-arm-32-15.1X53-D56.tgz but I had the same error 2 as you had.

Then, as per above url, I downloaded junos-install-media-net-arm-32-15.1X53-D56.tgz and worked like a charm.

Steps for the proceedure here: https://kb.juniper.net/InfoCenter/index?page=content&id=KB31462&cat=SWITCH_PRODUCTS&actp=LIST

Have fun!

Lifesaver thank you!!!!

Thank you very much, this worked great!

Another huge Thank You to aserban for the link to the install-media solution.

This was WAY harder to find than it should have been Juniper.

I recently had to try the following, and was able to get past.

https://kb.juniper.net/InfoCenter/index?page=content&id=KB20643

https://kb.juniper.net/InfoCenter/index?page=content&id=KB29113

at the u-boot prompt, i can get the device to pull down an image from tftp server:

*****

=> tftpboot junos-arm-32-15.1X53-D56.tgz

ETH LINK UP: 1000FD

Using bcmiproc_eth-0 device

TFTP from server 192.168.6.53; our IP address is 192.168.6.150

Filename 'junos-arm-32-15.1X53-D56.tgz'.

Load address: 0x61000000

Loading: #################################################################

        ....

        ########################################################

         603.5 KiB/s

done

Bytes transferred = 252393868 (f0b398c hex)

=>

*****

but it doesn't do anything with it.  what am i missing here? 🙂

Here are a couple of Juniper KB about this,

This is the format install procedure for EX2300/EX3400 (ELS), I noticed the lecacy procedure was shared a few times previuosly but that doesnt apply to this platform,

Doing bootable USB with install media image,

https://kb.juniper.net/InfoCenter/index?page=content&id=KB31265

Also in some cases, I havent seen this happening prior 15.1X53-D57, the procedure above may fail promting you to loade with error can't load kernel, here you can find the solution for that one as well,

https://kb.juniper.net/InfoCenter/index?page=content&id=KB33842&actp=RSS

I hope this has been helpfull!

Thanks, Ecladeron fro sharing those valuable links. It works perfectly. Great tips indeed.