clock source (SONET)
To set the clock source of the sent signal on SONET ports, use the clock source command in SONET/SDH
configuration mode. To cancel a clock source setting, use the no form of this command.
clock source {internal| line}
no clock source {internal| line}
Syntax Description
Specifies that the controller will clock its sent data from its internal clock.internal
Specifies that the controller will clock its sent data from a clock recovered from the
receive data stream of the line. This is the default value.
line
Command Default
The clock source for the controller is line.
Command Modes
SONET/SDH configuration
Command History
ModificationRelease
This command was introduced.Release 3.9.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
Use the clock source command to configure which reference clock is used by the sender.
Task ID
OperationsTask ID
read, writesonet-sdh
Examples
In the following example, the SONET controller is configured to clock its sent data from its internal clock:
RP/0/RSP0/CPU0:router(config)# controller sonet 0/2/0/2
RP/0/RSP0/CPU0:router(config-sonet)# clock source internal
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
855
SONET Controller Commands on the Cisco ASR 9000 Series Router
clock source (SONET)
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