Configuration Guide for Cisco NCS 1014, IOS XR Releases 26.x.x
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Configuration Guide for Cisco NCS 1014, IOS XR Releases 26.x.x
Updated: September 23, 2026
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Use this procedure to configure Pseudorandom Bit Sequence (PRBS) on the Coherent Probe port of an EDFA2 card without requiring the maintenance state.
The EDFA2 card supports PRBS configuration only on Coherent Probe port.
For EDFA2 card, you can configure PRBS only for coherentDSP without setting the secondary admin state of the controllers to maintenance.
Use this task to configure PRBS without maintenance state.
Enter the controller coherentDSP R/S/I/P command to enter the coherentDSP controller configuration mode.
RP/0/RP0/CPU0:ios(config)#controller CoherentDSP0/0/0/7Enter the prbs mode {source | sink | source-sink} pattern {pn31 | pn23 | pn15 | pn7} to configure the PRBS mode and pattern.
RP/0/RP0/CPU0:ios(config-CoDSP)#prbs mode source-sink pattern pn15Commit the changes.
RP/0/RP0/CPU0:ios(config-CoDSP)#commitUse these steps to verify CoherentDSP controller PRBS details and performance monitoring details.
Run the show controllers coherentDSP rack/slot/instance/port prbs-details command to display PRBS details configured on a coherentDSP controller.
RP/0/RP0/CPU0:ios#show controllers coherentDSP 0/2/0/7 prbs-details
Tue Mar 11 03:13:34.425 IST
----------------------PRBS details------------------
PRBS Test : Enable
PRBS Mode : Source-Sink
PRBS Pattern : PN7
PRBS Status : Locked
PRBS Lock Time(in seconds) : 1403
PRBS Bit Errors : 0
PRBS Found Count : 1
PRBS Lost Count : 0
PRBS Configured Time : 11 Mar 02:50:08 (1406 seconds elapsed)
PRBS First Lock Established Time: 11 Mar 02:50:11 (1403 seconds elapsed)
Result Summary : PASS
Run the show controllers coherentDSP rack/slot/instance/port pm current 30-sec|15-min|24-hours prbsto view the PRBS performance monitoring parameters on a coherentDSP controller.
RP/0/RP0/CPU0:ios#show controllers coherentDSP 0/2/0/7 pm current 15-min prbs
Tue Mar 11 03:21:31.173 IST
PRBS in the current interval [03:15:00 - 03:21:31 Tue Mar 11 2025]
PRBS current bucket type : Valid
EBC : 0 Threshold : 0 TCA(enable) : NO
FOUND-COUNT : 0 Threshold : 0 TCA(enable) : NO
LOST-COUNT : 0 Threshold : 0 TCA(enable) : NO
FOUND-AT-TS : NULL
LOST-AT-TS : NULL
CONFIG-PTRN : PRBS_PATTERN_PN7
STATUS : LOCKED
Last clearing of "show controllers OTU" counters neve
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