[j-nsp] How to pick JUNOS Version

[aaron1 at gvtc.com]

Thanks Kody, 2 questions sir... I recently began moving towards that same
version (17.4R2-S11) as I was hitting PR1419761 high cpu.

1 - did you upgrade straight from 15.1x54D51 to 17.4R2-S11 , or did you take
an intermediate step?  Asking since JTAC recently told me that this was too
far of a jump and I should go through 17.1 on my way to 17.4
15.1X54--------17.1----------17.4

2 - do you use that mgmt_junos route instance?  I would've expected to see
em0 or fxp0 in there or something like that, but I don't.

name at acx5048> show system information | grep Junos
Family: junos
Junos: 17.4R2-S11

name at acx5048> show route instance mgmt_junos detail
mgmt_junos:
  Router ID: 0.0.0.0
  Type: forwarding        State: Active

-Aaron