[j-nsp] How to shut down laser on any optics

[Jared Mauch]

> On Jun 24, 2020, at 10:50 AM, Pierre Emeriaud <petrus.lt at gmail.com> wrote:
> 
> Howdy
> 
> I'm trying to shut down the laser from my optics from the junos cli in
> order to ease troubleshooting. On MXes 240/480/960, mostly 17.4R2.
> 
> 'set interface ge-<foo> disable' works *sometimes* on mpc2e with an
> sfp, or on mpc2 with xfp, but fails (laser still emits) on some other
> mpc2 with xfp too, and didn't find it working on mpc2e and mpc7e with
> xfp and qsfp optics.
> 
> I know I can use 'test xfp <xfp index> laser off' from fpc shell, but
> not only this doesn't seem to work on anything besides xfp, it also
> requires shell access which I can't provide to everyone needing
> port-level privileges.
> 
> All juniper genuine optics, with the same P/N between working and
> non-working ones.
> 
> - would you consider the 'disable' not working as (I) expected a bug?
> - is there some other magic cli command that would achieve what i'm after?


Many of the optics don’t have a way to disable the laser except via custom commands over the i2c.  Last I read the SFF MSA there wasn’t a good way to do this, and it wasn’t required.

- Jared