[j-nsp] Old JunOS upgrade path

Eldon Koyle ekoyle+puck.nether.net at gmail.com
Fri Mar 8 15:17:44 EST 2019

Many (most?) network operating systems are an image file that the
switch either writes over a partition (ie. block-level copy) or boots
directly (ie. initrd/initramfs) with a separate partition for a config
file.  Junos is a full BSD operating system that installs packages to
partitions on the device, runs upgrade scripts, etc.


On Fri, Mar 8, 2019 at 12:28 PM Gert Doering <gert at greenie.muc.de> wrote:
> Hi,
> On Fri, Mar 08, 2019 at 10:38:16AM +0100, "Rolf Hanßen" wrote:
> > usually they say not more than 2 major releases in one step (i.e. 13 -> 15
> > -> 17).
> So why is that?
> Genuinely curious, as I do not have much JunOS upgrade experience - and
> my Cisco IOS experience so far has been "you can go from wherever you
> are to wherever you want to go" - when going up, you can hit warnings
> about "old config syntax", and when going down, you might lose config
> bits that are "new" - but besides this, things generally work.
> gert
> --
> "If was one thing all people took for granted, was conviction that if you
>  feed honest figures into a computer, honest figures come out. Never doubted
>  it myself till I met a computer with a sense of humor."
>                              Robert A. Heinlein, The Moon is a Harsh Mistress
> Gert Doering - Munich, Germany                             gert at greenie.muc.de
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp

More information about the juniper-nsp mailing list