[a-nsp] Weird L1 issue ...

[Bryan Holloway]

Interesting, but alas .... no change.

Tried both
	error-correction encoding reed-solomon
and
	error-correction encoding fire-code

I wish the Mellanox were a little more useful from a diagnostic 
standpoint. If I could see what IT'S doing, it may give me a clue since 
it works fine.

... very odd.


On 11/30/23 16:28, Siyuan Miao wrote:
> Have you tried FEC?
>  > error-correction encoding reed-solomon
> 
> 
> On Thu, Nov 30, 2023 at 11:25 PM Bryan Holloway via arista-nsp 
> <arista-nsp at puck.nether.net <mailto:arista-nsp at puck.nether.net>> wrote:
> 
>     Got a weird one ...
> 
>     7060CX running 4.28.9M (near-side)
> 
>     Trying to bring up a 100G link between it and another 7060CX (far-side)
>     with a carrier providing a wave in-between.
> 
>     The near-side Arista is new. Prior to its install, we had this circuit
>     plugged into a Mellanox, and it works fine -- no issues whatsoever.
> 
>     When we move the circuit to the near-side Arista, it won't come up.
>     No link.
> 
>     Tried new optics, no change.
> 
>     Actually swapped out the switch itself, no change.
> 
>     Even if we pull the Arista optics and plug it into the Mellanox, it
>     works fine.
> 
>     Normalize the circuit, it just won't come up.
> 
>     We see good light from the carrier, and the carrier says they see good
>     light from us.
> 
>     Are there any knobs I'm missing, or can anything think of a reason for
>     this behavior?
> 
>     I'm baffled.
>     -- 
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