NEC SOPHO IP 5000 Command Reference Manual page 133

loopback
mtu
Command Reference Guide
command can take effect only on some specific DCE devices. Clock inversion is
unnecessary for general applications.
For related commands, see physical-mode and clock.
Example
Invert the transmit-clock of the synchronous serial interface at DTE side.
[NEC-PHILIPS-Serial0/0/0]invert transmit-clock
Syntax
loopback
undo loopback
View
Serial interface view
Parameter
None
Description
Using the loopback command, you can enable a serial interface to perform
loopback. Using the undo loopback command, you can disable the serial
interface to perform loopback.
By default, loopback of the serial interface is disabled.
It is necessary for you to enable the serial interface to perform loopback only for
the purpose of testing some special functions.
Example
Enable the serial interface to perform loopback.
[NEC-PHILIPS-Serial0/0/0]loopback
Syntax
mtu size
undo mtu
View
Serial interface view
Parameter
size: MTU size on the serial interface, which is in the range of 128 to 1500
bytes and defaults to 1500.
Description
Using the mtu command, you can set the MTU of a serial interface. Using the
undo mtu command, you can restore the default setting.
The MTU setting of a serial interface can affect the assembly and fragmentation
of IP packets on the interface.
Example
Set MTU of the serial interface to 1200.
[NEC-PHILIPS-Serial0/0/0]mtu 1200
SOPHO
IP 5000/SOPHO IP6000
133