[j-nsp] FEC on 25G-LR links between Juniper and Arista

[Sebastian Wiesinger]

* Sebastian Wiesinger via juniper-nsp <juniper-nsp at puck.nether.net> [2023-12-06 12:55]:
> Hi,
> 
> we've run in some weird issue with 25G links and FEC between Juniper
> QFX5120 and Arista.
> 
> We have functioning links using 25G-SR optics and FEC108
> (Reed-Solomon) error correction. On Arista thats default, on the QFX
> we use
> 
> set interfaces et-0/0/46 gigether-options fec fec108
> 
> 
> This works.
> 
> Trying the same on another switch with 25G-LR optics doesn't work.

To answer my own question: Found out that FEC108 for JunOS with 25G-LR
optics was implemented from 23.1 onwards, currently running on
23.2R1-S1 with FEC108 enabled on JunOS and default config on Arista.

Best Regards

Sebastian

-- 
'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE SCYTHE.
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