HP MSR2000/3000/4000 Router Series Interface Command Reference

49
none: Disables CRC.
Examples
# Configure synchronous serial interface Serial 2/0 to adopt 32-bit CRC.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] crc 32
detect dcd
Use detect dcd to enable data carrier detection (DCD) on a serial interface.
Use undo detect dcd to disable DCD on a serial interface.
Syntax
detect dcd
undo detect dcd
Default
DCD is enabled on a serial interface.
Views
Synchronous serial interface view
Predefined user roles
network-admin
Usage guidelines
When determining whether a synchronous serial interface is up or down, the system detects by default
the DSR signal, DCD signal, and presence of cable connection. The interface is considered as up only
when the three signals are all valid.
Examples
# Enable DCD on synchronous serial interface Serial 2/0.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] detect dcd
Related commands
detect dsr-dtr
detect dsr-dtr
Use detect dsr-dtr to enable level detection on a serial interface, or detection on data set ready (DSR) and
data terminal ready (DTR) signals of data service unit/channel service unit (DSU/CSU).
Use undo detect dsr-dtr to disable level detection on a serial interface.
Syntax
detect dsr-dtr
undo detect dsr-dtr