I'm pleased to see that you followed my guidance on the use of the media install images, as you have now discovered EX2300 and EX3400 are similar platforms and share the same media image.
> I've made some small amount of progress, but typing commands recommended by ChapGPT, but ultimately it seems that i've gotten nowhere.
I would strongly suggest to avoid using ChatGPT to try and figure out technical solutions, it is just so incredibly unreliable. You will have much more success using Google and/or searching support forums/FAQs in relation to issues than relying upon ChatGPT.
For example a typical conversation with ChatGPT:
Q: Can I run Junos EVO on my EX4100-F?
A: Yes, your EX4100-F does run Junos EVO by default.
I can assure you that the EX4100-F does not run Junos EVO by default, and nor does it support Junos EVO. That is just a straight forward question, without getting into configuration, or device recovery etc. My own experience with ChatGPT is that it can't write Python scripts, SLAX scripts or Ansible playbooks reliably at all. Frequently suggests the use of imaginary libraries, repositories, keywords etc., that do not and have not existed, and I wouldn't expect it to write valid Junos configuration either.
> How is this supposed to work, and what could i be doing wrong?
Avoid using ChatGPT to solve the issue, instead take a look at the following two support articles, the first will assist with the "can't load kernel" error, and the second would be the approach of performing a media install for either EX2300 or EX3400s.
https://supportportal.juniper.net/s/article/Fix-Device-is-not-booting-up-with-can-t-load-kernel-error-on-EX3400-EX2300-Devices?language=en_US
https://supportportal.juniper.net/s/article/EX-How-to-format-install-EX2300s-and-EX3400s-via-USB?language=en_US
Regards,
Original Message:
Sent: 04-17-2025 09:21
From: JOEY SPATAFORA
Subject: EX2300-24T Will Not Boot (various errors)
Now i'm at the point where i:
1) have the correct file from the juniper download page: junos-install-media-usb-ex-arm-32-23.4R2-S4.11.img
2) verified that the checksum of that file matches the file on the USB drive (via "dd" command in macOS)
Yet the EX2300 still stops at the loader> prompt, when powering on the EX2300 with the USB already plugged in to the port on the back panel.
I've made some small amount of progress, but typing commands recommended by ChapGPT, but ultimately it seems that i've gotten nowhere.
How is this supposed to work, and what could i be doing wrong?
disk0: real size != size
platform-boot-usb not found
Error while including /boot/junos-boot.4th, in the line:
platform-boot-usb
Error while including /boot/junos-menu.4th, in the line:
include /boot/junos-boot.4th
|
can't load 'kernel'
Type '?' for a list of commands, 'help' for more detailed help.
loader>
loader> load /boot/kernel
loader> load -t dtb /boot/dtb/<your-dtb-file>.dtb
loader> boot
loader> ls disk1s1:/boot/dtb
disk1s1:/boot/dtb
ex2300.dtb
ex2300-24mp.dtb
ex2300-48mp.dtb
ex2300-c.dtb
ex3400.dtb
loader> load -t dtb /boot/dtb/ex2300.dtb
/boot/dtb/ex2300.dtb size=0x1fb7
loader> boot
---------------------------------------------
loader> lsdev
loader> include /boot/loader.rc
loader> load /boot/kernel
loader> load -t dtb /boot/dtb/ex2300.dtb
loader> boot
Found U-Boot device: disk
Probing all disk devices...
Checking unit=0 slice=<auto> partition=<auto>... good.
EHCI timed out on TD - token=0x800d8d80
EHCI timed out on TD - token=0x800d8d80
disk0: real size != size
platform-boot-usb not found
Error while including /boot/junos-boot.4th, in the line:
platform-boot-usb
Error while including /boot/junos-menu.4th, in the line:
include /boot/junos-boot.4th
|
can't load 'kernel'
Type '?' for a list of commands, 'help' for more detailed help.
loader>
Original Message:
Sent: 04-11-2025 17:56
From: asharp
Subject: EX2300-24T Will Not Boot (various errors)
Also, going via EX2300 or via EX3400 from the download pages, the images have the same checksums too.
Both 2300 and 3400 are ARM platforms.
Original Message:
Sent: 04-11-2025 15:53
From: JOEY SPATAFORA
Subject: EX2300-24T Will Not Boot (various errors)
Can you point me to Juniper documentation that confirms that "EX3400 install media image will also work on an EX2300"?
When i researched this online, i was confronted with multiple reasons why this would not work: different CPU, bootloader, architecture, etc.
I don't see how this could possibly work.
Original Message:
Sent: 01-14-2025 17:31
From: asharp
Subject: EX2300-24T Will Not Boot (various errors)
EX3400 install media image will also work on an EX2300.
Original Message:
Sent: 01-14-2025 11:19
From: JOEY SPATAFORA
Subject: EX2300-24T Will Not Boot (various errors)
My EX2300-24T switch appears to be degrading more and more each day. A few weeks ago, it stopped booting because it couldn't find /bin/sh. Now it doesn't even make it past the loader prompt.
I believe i need a new EX2300-24T image. What is the best/easiest way to obtain or purchase one?
Can I somehow leverage one of the images or packages from an EX4300-48p, qfx5100-48t-6q, or EX3400-24t?
Latest boot failure:
.menu_numbep not found
Error while including /boot/junos-menu.4th, in the line:
.menu_numbep @ 1+ dup .menu_ntmber !
/
can't load 'kernel'