On 1/8/25 20:16, Josh Crowder wrote:
Has anyone on this list configured a Juniper ACX6360-OX (transponder
mode) in a metro passive DWDM setup? If so, would you be willing to
look at a config and answer some questions? I'm attempting to get the
following working:
Router<-100G-Grey->ACX6360-OX<-100G CFP2 Tuned->FS Passive
Mux/Demux<-Dark Fiber->FS Passive Mux/Demux<-100G CFP2
Tuned->ACX6360-OX<-100G Grey->Router
The total distance between sides is less than 10km. I've seen this
setup working in the field from other providers, but we haven't been
able to get it working properly. And there isn't much documentation
material available for this platform from Juniper.
I'll assume the CFP2 pluggables are coherent (DCO).
Based on that, are you able to configure them under the Junos CLI, or
are you using a separate box to do that?
Have you characterized the fibre? Do you have OTDR values to determine
the fibre's loss profile?
Is the loss profile within the OSNR margins for the bit rate and
modulation you are looking to run on the line-side? Don't just rely on
the fact that the span is only 10km.
Since this is an unamplified link, you should be able to get away with
between 12.5dB - 20dB OSNR requirement for 100G or 200G, using QPSK,
8QAM or 16QAM. To be safe, QPSK will give you the most resilient
modulation to guarantee reliability.
Essentially, spend some time looking at the CFP2 output data to ensure
settings are correct and match on both ends, and that you have a usable
optical channel on the line-side.
Lastly, make sure all fibre patch cords are in good working order, and
that all ports (including the filters) are cleaned.
Mark.
