About this task
This procedure describes how to configure the following DWDM
coherent parameters.
Classic CLI
command
*A:Dut-A# configure port 1/1/c1 dwdm coherent
- coherent
compatibility - Configure the optical mode and rate of operation
cpr-window-size - Configure the Carrier Phase Recovery window size
dispersion - Configure the dispersion compensation
mode - Configure the dispersion algorithm mode
[no] report-alarms - Enable/disable logging of alarms
[no] rx-los-reaction - Configure the reaction to an RX LOS
rx-los-thresh - Configure the average input power LOS (Loss of Signal)
threshold
sweep - Configure the dispersion sweep start and end values
target-power - Configure the desired average output power
MD-CLI
command
*[pr:/configure port 1/1/c1 dwdm]
A:admin@cses-V27# coherent ?
coherent
apply-groups - Apply a configuration group at this level
apply-groups-exclude - Exclude a configuration group at this level
compatibility - Optical mode and rate of operation
cpr-window-size - Window size for the carrier phase recovery
dispersion - Residual chromatic dispersion compensation
mode - Mode used to compensate for chromatic dispersion
report-alarm + Enter the report-alarm context
rx-los-reaction - Reaction to an RX LOS
rx-los-thresh - Average input power LOS threshold
sweep + Enter the sweep context
target-power - Average output power target for the port
Note: For ZR and ZR+ optics, only the
compatibility, report-alarms,
rx-los-thresh, and target-power commands
are applicable.
-
Configure the coherent compatibility command
using the following context. The example below displays a compatibilty
metro configuration.
Example configure port 1/1/c1 dwdm coherent compatibility metro
(classic
CLI)
*A:Dut-A# configure port 1/1/c1 dwdm coherent compatibility
- compatibility <mode>
<mode> : long-haul|metro|access|interop|interop2|interop3|
long-haul-non-diff
*A:Dut-B# configure port 1/1/c1 dwdm coherent compatibility metro
Example configure port 1/1/c1 dwdm coherent compatibility metro
(MD-CLI)
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# compatibility ?
compatibility <keyword>
<keyword> - (long-haul|metro|access|interop|interop2|interop3|long-haul-
non-differential)
Default - long-haul
Optical mode and rate of operation
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# compatibility metro
The coherent compatibility applies different optic application
codes. The command default is
long-haul and to change what
has been previously configured, the user must shut down or disable the 1/1/c1
connector before provisioning for coherent compatibilty.
For
any DWDM compatibility changes, after the 1/1/c1 connector is configured as
no shutdown in the classic CLI or
admin-state enable in the MD-CLI, the coherent module
initializes and transitions through various states as visible in the “Module
State” field until it is ready again.
-
Configure the report-alarms or
report-alarm command using the following context. The
example below displays a configuration where the alarms are not reported.
configure port 1/1/c1 dwdm coherent no report-alarms
modflt mod netrx nettx hosttx (classic CLI)
Example
*A:Dut-A# configure port 1/1/c1 dwdm coherent report-alarms
- no report-alarms [modflt] [mod] [netrx] [nettx] [hosttx]
- report-alarms [modflt] [mod] [netrx] [nettx] [hosttx]
*A:Dut-B# configure port 1/1/c1 dwdm coherent no report-alarms modflt
mod netrx nettx hosttx
configure port 1/1/c1 dwdm coherent
report-alarm (MD-CLI)
Example
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# report-alarm ?
report-alarm
hosttx - Report the host (electrical side) transmit alarm
mod - Report the module alarm
modflt - Report the module fault alarm
netrx - Report the network (optical side) receive alarm
nettx - Report the network (optical side) transmit alarm
*[pr:/configure port 1/1/c1 dwdm coherent report-alarm]
A:admin@cses-V27# info
modflt false
mod false
netrx false
nettx false
hosttx false
When an alarm is reported, it is logged in the event logs and a
trap is sent to the Network Management System (NMS). For details about the
alarms and defect points, see the TIMETRA-PORT-MIB.mib. By default, all alarms
are reported.
-
Configure the rx-los-thresh
command using the following context. The example below displays a configuration
of -18 dBm.
configure port 1/1/c1 dwdm coherent rx-los-thresh
-18 (classic CLI)
Example
*A:Dut-A# configure port 1/1/c1 dwdm coherent rx-los-thresh
- rx-los-thresh <threshold>
<threshold> : [-30.00..-13.00] dBm - Default: -23.00
*A:Dut-B# configure port 1/1/c1 dwdm coherent rx-los-thresh -18
configure port 1/1/c1 dwdm coherent rx-los-thresh
-18 (MD-CLI)
Example
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# rx-los-thresh ?
rx-los-thresh <decimal-number>
<decimal-number> - <-30.0..-13.0> - decibel-milliwatts, 2 fraction digits
Default - -23
Average input power LOS threshold
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# rx-los-thresh -18
This command configures the received optical power threshold at
which the Loss of Signal (LOS) alarm is declared. To clear the LOS alarm, the
received optical power must be higher than the configured
rx-los-thresh command.
-
Configure the target-power
command using the following context. The example below displays a configuration
of -12 dBm.
configure port 1/1/c1 dwdm coherent target-power
-12 (classic CLI)
Example
*A:Dut-A# configure port 1/1/c1 dwdm coherent target-power
- target-power <power>
<power> : [-20.00..3.00] dBm - Default: 1.00
*A:Dut-A# configure port 1/1/c1 dwdm coherent target-power -12
configure port 1/1/c1 dwdm coherent target-power
-12 (MD-CLI)
Example
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# target-power ?
target-power <decimal-number>
<decimal-number> - <-20.0..3.0> - decibel-milliwatts, 2 fraction digits
Default - 1
Average output power target for the port
*[pr:/configure port 1/1/c1 dwdm coherent]
A:admin@cses-V27# target-power -12
The target-power command configures the
average output power target for the port.
Expected outcome The actual measured Tx power along with the configured
power is displayed by using the
show port 1/1/c1 detail
command.
===============================================================================
Transceiver Lane Digital Diagnostic Monitoring (DDM)
===============================================================================
High Alarm High Warn Low Warn Low Alarm
-------------------------------------------------------------------------------
Lane Tx Output Power (dBm) 0.00 -2.00 -13.00 -14.00
Lane Rx Optical Pwr (avg dBm) 2.00 0.00 -21.02 -23.01
-------------------------------------------------------------------------------
Lane ID Temp(C)/Alm Tx Bias(mA)/Alm Tx Pwr(dBm)/Alm Rx Pwr(dBm)/Alm
-------------------------------------------------------------------------------
1 - - -11.91 -9.86
===============================================================================
* indicates that the corresponding row element may have been truncated.
===============================================================================
Coherent Optical Module
===============================================================================
Cfg Tx Target Power: -12.00 dBm
Cfg Rx LOS Thresh : -23.00 dBm
Disp Control Mode : automatic Sweep Start Disp : -25500 ps/nm
Cfg Dispersion : 0 ps/nm Sweep End Disp : 2000 ps/nm
CPR Window Size : 32 symbols Rx LOS Reaction : squelch
Compatibility : longHaul
Cfg Tx Power Min : -22.90 dBm Cfg Tx Power Max : 4.00 dBm
Cfg Alarms : modflt mod netrx nettx hosttx
Alarm Status :
Defect Points :
Rx Q Margin : 4.1 dB Chromatic Disp : 1 ps/nm
SNR/OSNR X Polar : 19.1 dB / 35.7 dB Diff Group Delay : 2 ps
SNR/OSNR Y Polar : 19.1 dB / 35.7 dB Pre-FEC BER : 3.430E-04
Module State : ready
Tx Turn-Up States : init laserTurnUp laserReadyOff laserReady
modulatorConverge outputPowerAdjust
Rx Turn-Up States : init laserReady waitForInput adcSignal opticalLock
demodLock
-------------------------------------------------------------------------------
Coherent Optical Port Statistics (Elapsed Seconds: 588)
-------------------------------------------------------------------------------
Statistic Current Average Minimum Maximum
-------------------------------------------------------------------------------
Rx BER 3.430E-04 3.415E-04 3.050E-04 3.780E-04
Rx SNR (dB) 19.2 19.1 19.1 19.2
Rx OSNR (dB) 35.7 35.7 35.7 35.7
Rx Chromatic Disp (ps/nm) 1 2 1 3
Rx Diff Group Delay (ps) 2 2 2 3
Rx Freq Offset (MHz) 287 284 182 387
Rx Q (dB) 10.6 10.5 10.5 10.6
Rx Per-Channel Power (dBm) -9.69 -9.63 -9.78 -9.49
Tx Power (dBm) -11.93 -10.69 -11.93 -9.72
-------------------------------------------------------------------------------