Cisco NCS 5000 Series

•
option 1: Includes PRC, SSU-A, SSU-B, SEC, and DNU. This is the default option.
•
option 2 generation 1: Includes PRS, STU, ST2, ST3, SMC, ST4, RES, and DUS.
•
option 2 generation 2: Includes PRS, STU, ST2, ST3, TNC, ST3E, SMC, ST4, PROV, and DUS.
The quality option configured here must match the quality option specified in the
quality receive and quality transmit commands in the interface frequency synchronization
configuration mode.
Note
•
To enable logging of frequency synchronization selections, use log selection command in the frequency
synchronization configuration mode.
◦
changes: Logs errors and every time there is a change to the selected source.
◦
errors: Logs only when there are no available frequency sources or when the only available
frequency source is an internal oscillator.
Configuration Example
RP/0/RP0/CPU0:router# configure
RP/0/RP0/CPU0:router(config)# frequency synchronization
RP/0/RP0/CPU0:router(config-freqsync)# quality itu-t option 2 generation 1
RP/0/RP0/CPU0:router(config-freqsync)# log selection changes
RP/0/RP0/CPU0:router(config-freqsync)# commit
Running Configuration
/* Quality Level (QL) of the router */
frequency synchronization
quality itu-t option 2 generation 1
!
/* Logging Frequency Synchronization Selections */
frequency synchronization
log selection changes
!
Verification
To display the frequency synchronization selection, use show frequency synchronization selection command.
RP/0/RP0/CPU0:router# show frequency synchronization selection
Fri Apr 7 15:06:24.123 UTC
Node 0/RP0/CPU0:
==============
Selection point: T0-SEL-B (1 inputs, 1 selected)
Last programmed 4d03h ago, and selection made 2d23h ago
Next selection points
SPA scoped : None
Node scoped : None
Chassis scoped: NCS5K_BCM_TX_SELECT
Router scoped : None
Uses frequency selection
Used for local line interface output
S Input Last Selection Point QL Pri Status
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System Management Configuration Guide for Cisco NCS 5000 Series Routers, IOS XR Release 6.2.x
173
Frequency Synchronization
Configuring Frequency Synchronization