[j-nsp] Old JunOS upgrade path

[Sander Steffann]

Hi,

> On Fri, Mar 08, 2019 at 01:17:44PM -0700, Eldon Koyle wrote:
>> 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.
> 
> So?

I didn't do an upgrade but I replaced an SRX last week. Went from an SRX210 with 12.1X to an SRX345 with 18.4R. Almost the whole configuration was copy&paste. The interface names were different, but that was about it. I see no reason why an upgrade wouldn't have worked: it's basically the same as copy&pasting an old config to a new OS release.

Cheers,
Sander

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