PurposeCommand or Action
Example:
RP/0/RSP0/CPU0:router(config-freqsync)#
clock-interface
timing-mode system
driven only by input from line interfaces and the internal oscillator; it is
never driven by input from another clock interface. In addition, some
heuristic tests are run to detect if the signal being sent out of one clock
interface can be looped back by some external box and sent back in via the
same, or another clock interface.
• independent—Specifies that the output of clock interfaces is driven
only by the line interfaces (SyncE and SONET/SDH), as in the default
mode. Loopback detection is disabled.
• system—Specifies that the output of a clock interface is driven by the
system-selected timing source (the source used to drive all SyncE and
SONET/SDH interfaces), including clock interfaces. Loopback
detection is disabled.
(Optional) Specifies the quality level for the router. The default is option
1.
quality itu-t option {1 | 2 generation {1 | 2}}
Example:
RP/0/RSP0/CPU0:router(config-freqsync)#
quality itu-t
option 2 generation 1
Step 4
• option 1—Includes PRC, SSU-A, SSU-B, SEC and DNU.
• 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 interface frequency synchronization configuration mode.
Note
Enables logging to frequency synchronization.log selection {changes | errors}
Step 5
Example:
RP/0/RSP0/CPU0:router(config-freqsync)#
log selection changes
• changes—Logs every time there is a change to the selected source,
in addition to errors.
• errors—Logs only when there are no available frequency sources, or
when the only available frequency source is the internal oscillator.
Saves configuration changes.Use one of these commands:
Step 6
•
end
•
When you issue the end command, the system prompts you to commit
changes:
Uncommitted changes found, commit them
before exiting(yes/no/cancel)? [cancel]:
•
commit
Example:
RP/0/RSP0/CPU0:router(config-freqsync)#
end
◦
Entering yes saves configuration changes to the running
configuration file, exits the configuration session, and returns
the router to EXEC mode.
or
RP/0/RSP0/CPU0:router(config-freqsync)#
commit
◦
Entering no exits the configuration session and returns the router
to EXEC mode without committing the configuration changes.
Cisco ASR 9000 Series Aggregation Services Router System Management Configuration Guide, Release 5.1.x
194
Configuring Frequency Synchronization
Enabling Frequency Synchronization on the Router
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