HP MSR2000/3000/4000 Router Series Interface Command Reference

157
undo clock
Default
The clock mode is slave.
Views
POS interface view
Predefined user roles
network-admin
Parameters
master: Sets the clock mode of the POS interface to master.
slave: Sets the clock mode of the POS interface 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 interface POS 5/1 to master.
<Sysname> system-view
[Sysname] interface pos 5/1
[Sysname-Pos5/1] clock master
crc
Use crc to set the CRC length on the POS interface.
Use undo crc to restore the default.
Syntax
crc { 16 | 32 }
undo crc
Default
The CRC length is 32 bits.
Views
POS interface view
Predefined user roles
network-admin
Parameters
16: Sets the cyclic redundancy check (CRC) length to 16 bits.
32: Sets the CRC length to 32 bits.