Reset Config

request system zeroize

После этого система будет перезагружена и можно будет зайти под root и пустым паролем.

Начальные настройки

1. Выставляем пароль рута
   

   set system root-authentication plain-text-password

2. Настраиваем Management interface
   Для ex4600-40f это: em0–RJ-45 (1000 Base-T) management Ethernet port (C0)

   set interfaces em0 unit 0 family inet address 10.50.2.101/16
   set routing-options static route 0.0.0.0/0 next-hop 10.50.0.1

3. Прочие настройки
   

   set system host-name ex4600-1
   set system domain-name met.int
   set system domain-search met.int
   set system time-zone Europe/Moscow
   set system name-server 10.50.4.101
   set system name-server 10.50.40.202
   set system services ssh protocol-version v2
   set system ntp server 10.50.0.1 version 4
   set system ntp server 10.50.4.101 version 4
   set system ntp server 10.50.0.1 prefer
   set system services ssh sftp-server

Обновляем прошивку

Старая версия:

user@ex4600-1> show version 
fpc0:
--------------------------------------------------------------------------
Hostname: ex4600-1
Model: ex4600-40f
Junos: 19.2R1.8 limited
JUNOS Base OS boot [19.2R1.8]
JUNOS Base OS Software Suite [19.2R1.8]
JUNOS Crypto Software Suite [19.2R1.8]
JUNOS Online Documentation [19.2R1.8]
JUNOS Kernel Software Suite [19.2R1.8]
JUNOS Packet Forwarding Engine Support (qfx-ex-x86-32) [19.2R1.8]
JUNOS Routing Software Suite [19.2R1.8]
JUNOS jsd [i386-19.2R1.8-jet-1]
JUNOS SDN Software Suite [19.2R1.8]
JUNOS Enterprise Software Suite [19.2R1.8]
JUNOS Openconfig [19.2R1.8]
JUNOS Web Management Platform Package [19.2R1.8]
JUNOS py-base-i386 [19.2R1.8]
JUNOS py-extensions-i386 [19.2R1.8]
JUNOS Web Management Application package [19.2A1.4]
QFX Installation Software [19.4R1.10]
JUNOS Host Software [18.3R1.9]

https://support.juniper.net/support/downloads/

Выбираем EX4600 Series и скачиваем tgz

Обновляем прошивку (использовал SFTP)
request system software add no-copy /var/tmp/jinstall-host-ex-4600-19.4R1.10-signed.tgz

см. http://ciscomaster.ru/content/obnovlenie-junos-software-i-otkatrollback