R2511-HP MSR Router Series Interface Command Reference(V5)

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Syntax
clock { master | slave }
undo clock
Default
The clock mode of a CPOS interface is slave.
Views
CPOS interface view
Default command level
2: System level
Parameters
master: Sets the clock mode to master.
slave: Sets the clock mode to slave.
Usage guidelines
When the clock mode of a CPOS interface is master, it uses the internal clock source.
When the clock mode of a CPOS interface is slave, it uses the line clock source.
When connected to a SONET/SDH device, the CPOS interface must use the slave clock. The
SONET/SDH network clock is more precise than the clock provided by the device.
When two CPOS interfaces are directly connected, you must configure the two ends with different clock
modes.
Examples
# Set the clock mode of CPOS 1/0 to master.
<Sysname> system-view
[Sysname] controller cpos 1/0
[Sysname-Cpos1/0] clock master
controller cpos
Use controller cpos to enter CPOS interface view.
Syntax
controller cpos cpos-number
Views
System view
Default command level
2: System level
Parameters
cpos-number: CPOS interface number.
Examples
# Enter the interface view of CPOS 1/0.
<Sysname> system-view