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.
Thanks in advance!
-Josh
I would say you want to check all the optics and light levels
along the way at each hop to verify things are working as expected,
including the the light levels out of the passive mux. I have seen bad
ports on an AWG/passive mux before, so the more you can test/loop to
figure out what is working and what isn't will be best.
make sure that if there's any payload options thos eare set
correctly, be they otu or odu for your 100g signal.
Have you logged into the FPC and dumped the i2c to verify the
optic tuning is staying, or is it tuned with an external box, eg:
flexbox?
- Jared
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.
I second the method Jared is suggesting, go hop-by-hop, check light levels, and make use of loopback modes to establish which partial sections may be working already. (If any loopback is available, I don't know your platform specifically)