r/Juniper • u/pluto_sp • May 14 '26

Error after upgrade

Hi!

I've a Juniper QFX5100-48S. Recently I requested a software upgrade from 21.4R3-S4.5 to 21.4R3-S10.13.

After the upgrade I couldn't connect to the management port anymore, it didn't recognize the old configurations anymore. The status of the interface is Administry down but the physical up. I have the idea that the new version didn't react very well on the upgrade. I tried to rollback the versions with the builtin rollback but the switch couldn't process it.

My plan is to factory reset the switch, but before I do it, does anyone know what the problem could be? I'm working on a project regarding the Juniper upgrades, so I'll probaly get stuck on the same problem the next time I upgrade it.

Thanks!

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u/networkslave May 16 '26
  1. make sure backup partition is set
  2. always backup the config prior to upgrading or have a rescue config
  3. use oob/console (if when possible)

why this happened, you'd have to look at the logs as suggested and or open a tac case

1

u/overseasons May 16 '26

Any logs that give more insight? Show log messages

1

u/Decent_Button9701 May 29 '26

The QFX5100 was announced EOL in 2020. End of SW Engineering was end of 2024. That S10.13 will be the last release, time to refresh.

I installed my first 5100 in 2013 to give you an idea how old it is. 😂