R0106-HP MSR Router Series Interface Command Reference(V7)

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Syntax
clock { master | slave }
undo clock
Default
The clock mode is slave.
Views
Standard POS interface view
Predefined user roles
network-admin
Parameters
master: Sets the clock mode to master.
slave: Sets the clock mode to slave.
Usage guidelines
POS interfaces support the following clock modes:
• Master—Uses internal clock signal.
• Slave—Uses line clock signal.
If the POS interface is connected to another router, set its clock mode to be different from the mode used
by the remote end. If the POS interface is connected to a SONET/SDH device, which provides higher
clock precision, always set its clock mode to slave.
Examples
# Set the clock mode of POS 2/2/0 to master.
<Sysname> system-view
[Sysname] interface pos 2/2/0
[Sysname-Pos2/2/0] clock master
crc
Use crc to set the CRC length on an interface.
Use undo crc to restore the default.
Syntax
crc { 16 | 32 }
undo crc
Default
The CRC length is 32 bits.
Views
Standard POS interface view, POS channel interface view
Predefined user roles
network-admin