Thursday, December 26, 2013

EX 4200 :- Upgrading Junos


  1. Upgrading Junos
1.   Procedure to upgrade the switch through USB:

ΓΌ  Login with root credentials

  • Mount USB

% mount_msdosfs /dev/da1s1 /mnt

/dev/da1s1 :- This path will change according to the USB (Eg:- da1s0/da1s2 ETC.....


  • Go to mount directory
% cd /mnt

  • Copy jloader & jinstall software package to temp directory

% cp jloader....<press tab> /var/tmp  For XML scrips need to install
% cp jinstall...<press tab> /var/tmp   This for install the IOS

  • To verify file, go to /var/tmp directory:

% cd /var/tmp

  • To verify the package files
% ls

  • Type cli and enter into operational mode
% cli





  • Add the software package
> request system software add /var/tmp/jloader...<press tab>  no-opy
> request system software add /var/tmp/jinstall..<press tab>  no-copy

  • Reboot the device
> request system reboot

Type yes


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  • After the upgrade check the current version
> show version
> show system snapshot media internal --> to verify OS on each partition (primary + backup)

  • If there is mismatch run below command
> request system snapshot slice alternate


  • Check the routing-engine utilization
> show chassis routing-engine

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