[EX] How to install software on EX Series devices via a TFTP server

Perform the following steps:

Prepare a TFTP server and put the corresponding image in the TFTP root directory.

For example, the IP address of the TFTP server is 192.168.100.1/24 and the filename of the image is jinstall-ex-10.0R2-domestic-signed.tgz.

Directly connect the EX Series device's management port to the TFTP server, or make sure that they are in the same broadcast domain.
Connect a terminal to the EX Series device's console port and power-on the switch.

When Loading /boot/defaults/loader.conf is displayed, press Enter:

Hit [Enter] to boot immediately, or space bar for command prompt.

Press the space bar to enter the manual loader. The loader > prompt is displayed.

Note: Due to a one-second delay, do not press the space bar until Loading /boot/defaults/loader.conf is displayed.

Set the EX Series switch-management IP address and netmask:

loader> set ipaddr=192.168.100.2
loader> set netmask=255.255.255.0
loader> set serverip=192.168.100.1

Note: In case the TFTP server is not in the same IP segment, the gateway IP address will also be needed. Example:

loader> set gatewayip=192.168.100.1

Install the Junos OS image via TFTP:

loader> install tftp://192.168.100.1/jinstall-ex/mx-10.0R2-domestic-signed.tgz

Note: This will install Junos OS to an alternate slice in the system, or with [--format] option for a format installation.

loader> install --format tftp://192.168.100.1/jinstall-ex/mx-10.0R2-domestic-signed.tgz

The part of the boot log shown below is related to the steps listed above:

Consoles: U-Boot console  
Found compatible API, ver. 7

FreeBSD/PowerPC U-Boot bootstrap loader, Revision 2.1
(XXX@apg-bbuild01.juniper.net, Wed Feb  6 11:23:55 PST 2008)
Memory: 1024MB
Loading /boot/defaults/loader.conf 
/kernel data=0x9dc348+0x6df44 syms=[0x4+0x87bb0+0x4+0x8e152]

Hit [Enter] to boot immediately, or space bar for command prompt.< Press the space bar

Type '?' for a list of commands, 'help' for more detailed help.
loader>        
loader> set ipaddr=192.168.100.2
loader> set netmask=255.255.255.0
loader> set serverip=192.168.100.1
loader> install tftp://192.168.100.1/jinstall-ex-10.0R2-domestic-signed.tgz
Speed: 100, full duplex
Package /jinstall-ex/mx-10.0R2-domestic-signed.tgz is signed...
/kernel data=0x504104+0x32e60 syms=[0x4+0x50a00+0x4+0x6366f]
Kernel entry at 0xa0000100 ...
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
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All rights reserved.
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