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Virtual Chassis members with different versions of Junos

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  • 1.  Virtual Chassis members with different versions of Junos

    Posted 02-13-2018 11:31

    This is a curiosity question, as I have not yet found a definative answer. I plan on testing this, but thought maybe a quick answer may save me some time:

     

    * Is it possible to add  member switches that are running a differnet version of Junos? 

     

    Obviously, proper procedure would be to install same verison on new switch before adding, but what happens if this isnt done?  Does the master upgrade/downgrade  Junos on the newly added switch? 

     

    Thanks



  • 2.  RE: Virtual Chassis members with different versions of Junos
    Best Answer

    Posted 02-13-2018 11:41
    Please refer to below kb. It will become inactive.

    https://kb.juniper.net/InfoCenter/index?page=content&id=KB21133&actp=METADATA


  • 3.  RE: Virtual Chassis members with different versions of Junos

    Posted 02-13-2018 12:31

    You can also have the VC upgrade the newly added switch by adding the 'set virtual-chassis auto-sw-update' configuration knob beforehand. This way a new switch is upgraded to the same version as the rest of the existing VC.

     

    Ref: https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/virtual-chassis-ex4200-software-automatic-update-ex-series-cli.html



  • 4.  RE: Virtual Chassis members with different versions of Junos

    Posted 02-13-2018 12:47

     Sounds like, as suspected, best practice is to match versions prior to adding a member.

     

    Thanks for the clarification on this.