Reinstall JUNOS Software

If the JUNOS software becomes damaged, you must reinstall it. (See Table 22.)

Table 22: Checklist for Reinstalling JUNOS Software

JUNOS Software Reinstallation Tasks	Command or Action
Before You Reinstall JUNOS Software
Log the Software Version Information	show version | save filename
Log the Hardware Version Information	show chassis hardware | save filename
Log the Chassis Environment Information	show chassis environment | save filename
Log the System Boot-Message Information	show system boot-messages | save filename
Log the Active Configuration	show configuration | save filename
Log the Interfaces on the Router	show interface terse | save filename
Log the BGP, IS-IS, and OSPF Adjacency Information	show bgp summary | save filename show isis adjacency brief | save filename show ospf neighbor brief | save filename
Log the System Storage Information	show system storage | save filename
Back Up the Currently Running and Active File System	request system snapshot
Have the Boot Floppy or PCMCIA Card Ready	http://www.juniper.net/support
Reinstall the JUNOS Software	Insert the floppy and reboot the system.
Reconfigure the JUNOS Software
Configure Names and Addresses	Log in as root. Start the CLI. Enter configuration mode: configure set system host-name host-name set system domain-name domain-name set interfaces fxp0 unit 0 family inet address address/prefix-length set system backup-router address set system name-server address
Set the Root Password	set system root-authentication plain-text-password set system root-authentication encrypted-password password set system root-authentication ssh-rsa key commit exit
Check Network Connectivity	ping address
Copy Backup Configurations to the Router	file copy var/tmp configure [edit] load merge /config/filename or load replace /config/filename [edit] commit
After You Reinstall JUNOS Software
Compare Information Logged Before and After the Reinstall	show version | save filename show chassis hardware | save filename show chassis environment | save filename show system boot-messages | save filename show configuration | save filename show interfaces terse | save filename show bgp summary show isis adjacency brief show ospf neighbor brief | save filename show system storage | save filename
Back Up the New Software	request system snapshot