[j-nsp] Old JunOS upgrade path

[Pierre Emeriaud]

Le ven. 8 mars 2019 à 10:26, Robert Hass <robhass at gmail.com> a écrit :
>
> Hi
> Can I do direct upgrade of JunOS 13.2S to 17.4S ?
> Platform is MX80
> Or should I go step by step: i.e:
> 13.2 -> 14.1
> 14.1 -> 15.1
> 15.1 -> 16.1
> 16.1 -> 17.1
> 17.1 -> 17.4

As others said, direct upgrade is somewhat unsupported and quite bold.

We're currently upgrading mx480s from 13.3R5 to 17.2R2 with an
intermediate step on 15.1F5. As those are LNSes we have to activate
tomcat (`services subscriber-management`) while in 15.1, then continue
the upgrade.

For downgrades besides deleting the subscriber-management
configuration we disable GRES and commit sync, and it goes smoothly.

HTH,
pierre