After booting the device, "=>" sign is showing in Juniper SRX 100 router please support. We are trying hard to restore the OS, but still failed, kindly support us urgently.

  • This means that the device is in U-boot mode. what happens when you type in 'boot'?
    – Ricke912
    Feb 3, 2016 at 10:46
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer.
    – Ron Maupin
    Aug 13, 2017 at 5:43

1 Answer 1


Please review this article, hopefully it will help you:

Installing JUNOS Software

From u-boot:

=> setenv ipaddr
=> setenv netmask
=> setenv gatewayip
=> setenv serverip
=> saveenv

Reboot into the loader:

Loader>install tftp://

(Of course, use network settings relevant to your environment, and an image filename that you posses.)

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