Jloader Image Released:

• Image Name:      jloader-ex-3242-12.1R3-signed.tgz

• Identifier:           U-Boot 1.1.6 (Jul 5 2012 - 11:58:22) 1.0.0

NOTE:

The reference to "U-Boot 1.1.6 (Jun 5 2012 - 02:24:53)" is mentioned below since it is the factory installed uboot, and has a different date stamp than the jloader release in this TSB once installed.
Both the factory uboot and jloader provided in this TSB are identical but will have different date stamps.

• Factory install uboot:       "U-Boot 1.1.6 (Jun 5 2012 - 02:24:53)"
• Jloader installed:             “U-Boot 1.1.6 (Jul 5 2012 - 11:58:22) 1.0.0”

What’s in this TSB?

1. Solution for PR/897557
2. JUNOS Release Versions Supported for EX4200 Hardware with USB Controller 2.0
3. Junos Hardware Check – new implementation

Problem:

• PR/897557 - EX4200 looping at boot with error "USB:EHCI host controller not found"

• Since there are two banks, one with the uboot that supports USB controller 2.0 (default bank) and the other which does not, the unit will boot successfully 50% of the time after a power cycle, or reboot

• The uboot has no effect while Junos is running, but when the unit is power cycled or rebooted the unit will go into a boot loop until it is powered off (see error below).

• The unit has to be powered off in order to clear the error condition which will revert back and boot from the default bank 0, since it detected an error during the previous boot.

• This cycle will repeat itself over and over since the unit always tries to boot off of the writable bank 1 first, unless it is empty.

Error Message with "U-Boot 1.1.6 (Mar 26 2011 - 04:42:33)" installed:

Solution:

PR/897557

• If an older jloader was installed in the field via TSB15524 [juniper.net] then you must install jloader Image “jloader-ex-3242-12.1R3-signed.tgz” , identified as “U-Boot 1.1.6 (Jul 5 2012 - 11:58:22)" to overwrite bank 1.

• DO NOT install older jloader image "U-Boot 1.1.6 (Mar 26 2011 - 04:42:33)" with EX4200 hardware revision “05.xx” or above.

RECAP:

• EX4200 hardware with USB controller revision 2.0 is not compatible with older uboot/jloader releases prior to "U-Boot 1.1.6 (Jun 5 2012 - 02:24:53)". This older jloader dated “U-Boot 1.1.6 (Mar 26 2011 - 04:42:33)”, via TSB15524 [juniper.net] , is not compatible with the newer EX4200 hardware revision “05.xx” and above.

• The EX4200 hardware revision “05.xx”, and above, ships with the compatible uboot version "U-Boot 1.1.6 (Jun 5 2012 - 02:24:53)" or later. It is installed in the non-writable default bank 0.

• The only way this incompatibility can happen is if the second loader bank 1 (writable) is installed with an earlier released version such as “U-Boot 1.1.6 (Mar 26 2011 - 04:42:33)”. This can only happen if the older jloader "U-Boot 1.1.6 (Mar 26 2011 - 04:42:33)" from TSB15524 [juniper.net] is installed in the field to writable bank 1. Prior to April, 2013, the second bank 1 was shipped empty so the EX would always boot from the default bank 0 unless another jloader is installed in bank 1.

• Impacted Platforms: EX4200-48T, EX4200-48P, EX4200-24T, EX4200-24P, EX4200-24F

How to check hardware revision:

• Command:

• Command:

• USB Controller 2.0 is identified by Major Routing Engine (RE) Revision "05.xx". Anything prior to “05.xx” has an earlier USB Controller revision and not impacted.

• The Routing Engine (RE) is identified by the second line down in the output above, with the first two hex values as the identifier (ie: 05.xx). 

• Output 1 above does NOT have the USB Controller revision 2.0 

• Output 2 above DOES have the USB Controller revision 2.0

IMPORTANT NOTES

JUNOS Release Versions Supported for EX4200 Hardware revision 05.xx, and later, with USB Controller 2.0:

• 10.4R5 and above
• 11.1R3 and above
• 11.2R1 and above
• 11.3R1 and above
• 11.4R1 and above
• All later Junos releases

Junos Hardware Check implementation - Verify Hardware and JUNOS Support:

• 10.4R14
• 11.4R8
• 12.1R6
• 12.2R4
• 12.3R3

root@router> request system software add /var/tmp/jinstall-ex-4200-10.4R4.5-domestic-signed.tgz                  

Checking pending install on fpc0

Validating on fpc0
Done with validate on all virtual chassis members

fpc0:
WARNING: Upgrading/Downgrading to a release that does not provide
WARNING: support to the new hardware in the platform
WARNING: The supported releases for this platform are 10.4R5.2 and future releases
WARNING: 11.1, 12.1, 12.2, 12.3 releases and all future releases

2018/06/14 : Recover broken download links

• Jloader Image - jloader-ex-3242-12.1R3-signed.tgz - download
• PR897557 --- EX4200 looping at boot with error "USB:EHCI host controller not found"