100g PCS Errors

Wed Aug 19 16:46:45 UTC 2020

we have been making 100G packet capture systems for 5 years now ( fmad.io
). In the early days vendor qualified transceivers really do make a
difference, its 25Gbps signaling per differential pair which is anything
but easy. Back then (4-5Y ago) the cheap QSFP28 vendors had some really
marginal parts... we had to tune the fpga alot to get the QSFP28s to to
work correctly, and even then some just wouldnt work at all / have alot of
errors.

If your using latests Finisar or Avago level transceivers should be fine,
currently (last 12 months) the cheap transceivers dont need any tuning too.
Guess depends if your using old HW / old transceivers or new HW with new
transceivers.

Aaron

On Wed, 19 Aug 2020 at 23:21, Tom Beecher <beecher at beecher.cc> wrote:

> It's not normal, no.
>
> On Wed, Aug 19, 2020 at 10:02 AM Nicholas Warren <
> nwarren at barryelectric.com> wrote:
>
>> We've got a 100g qsfp in an mx204 that has 1207 bit errors and 29666
>> errored blocks after 24 hours of just being linked up...
>> I would assume this is not normal behavior, but I haven't used 100g
>> before. Do others see high error rates on their 100g optics?
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.nanog.org/pipermail/nanog/attachments/20200820/4bdee514/attachment.html>