[j-nsp] PCS errors with PTX box

[Luis Balbinot]

Hey.

Anyone here using PTX1Ks with multiple 100G LR4 links and third party optics?

We recently started deploying a few PTX1K routers in some locations
and we are getting some weird PCS errored blocks on LR4 interfaces. We
haven't tested with the official Juniper QSFP28 module yet, but we
tried with two different brands. Apparently the issue only happens
with LR4 interfaces.

We are on JunOS 17.4R2-S2.3. JTAC didn't find anything yet and our SE
even suggested replacing the box but we get that same issue with
multiple boxes. If we play around with the interfaces (i.e. change
from port 25 to 67) sometimes we get rid of the errors on that link.

Thanks.

Luis