R3303-HP HSR6800 Routers Interface Command Reference

112
E1-F interface configuration commands
clock-change auto
Use clock-change auto to enable the automatic clock mode change function on the interface, in other
words, configure the interface that uses the slave clock mode to switch to the master clock mode
automatically when receiving an alarm indication signal (AIS)/loss of signal (LOS)/loss of frame (LOF)
alarm. After the alarm is cleared, the interface automatically switches back to the user-configured clock
mode.
Use undo clock-change auto to disable the automatic clock mode change function. If the interface has
already switched its clock mode, this command restores the user-configured clock mode for the interface.
Syntax
clock-change auto
undo clock-change auto
Default
Automatic clock mode change is disabled.
Views
E1-F interface view
Default command level
2: System level
Parameters
auto: Enables automatic clock mode change for the interface.
Examples
# Enable automatic clock mode change for E1-F interface Serial 2/0/0.
<Sysname> system-view
[Sysname] interface serial 2/0/0
[Sysname-Serial2/0/0] clock-change auto
Related commands
fe1 clock
crc
Use crc to configure CRC mode for an E1-F interface.
Use undo crc to restore the default.
Syntax
crc { 16 | 32 | none }
undo crc
Default
The CRC mode f for an E1-F interface is 16-bit CRC.