原文地址：JUNOS升级步骤

注意：升级时配置和一些其它附属文件会被自动保存，但存放在RE上的本地日志等文件可能会被删除。所以如果需要保存这些日志等文件也应该在升级前使用FTP备份这些文件到服务器上。

1、备份

xiaocisco@test-j2320> request system snapshot

xiaocisco@test-j2320# save /var/home/xiaocisco/config.junos.txt

xiaocisco@test-j2320# run file copy config.junos.txt ftp://username:[email protected]/config.junos.txt

2、将新的JUNOS使用ftp上传至Juniper设备

xiaocisco@test-j2320#run file copy ftp://username:[email protected] /var/tmp/junos-jsr-9.5R1.8-domestic.tgz

3、JUNOS安装

xiaocisco@test-j2320> request system software add /var/tmp/junos-jsr-9.5R1.8-domestic.tgz

NOTICE: Validating configuration against junos-jsr-9.5R1.8-domestic.tgz.

NOTICE: Use the 'no-validate' option to skip this if desired.

Checking compatibility with configuration

4、重启完成安装

xiaocisco@test-j2320# run request system reboot

Reboot the system ? [yes,no] (no)yes

5、升级完成后，备份FLASH当前JUNOS和配置到硬盘上

xiaocisco@test-j2320> request system snapshot