198 CHAPTER 11: FUNDAMENTAL SERIAL INTERFACE CONFIGURATION COMMANDS
Example # Set the MTU of interface Serial 2/0 to 1,200 bytes.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial1/0] mtu 1200
physical-mode
Syntax physical-mode { async | sync }
View Serial interface view
Parameter async: Sets the synchronous/asynchronous serial interface to operate in
asynchronous mode.
sync: Sets the synchronous/asynchronous serial interface to operate in
synchronous mode.
Description Use the
physical-mode command to set the operating mode of the
synchronous/asynchronous serial interface.
By default, synchronous/asynchronous serial interfaces are operating in
synchronous mode.
Example # Set synchronous/asynchronous serial interface 2/0 to operate in asynchronous
mode.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial1/0] physical-mode async
phy-mru
Syntax phy-mru size
undo phy-mru
View Asynchronous serial interface view, AUX interface view
Parameter size: Maximum receive unit (MRU) to be set, in the range 4 to 1,700 (in bytes).
Description Use the
phy-mru command to set the MRU for an asynchronous serial interface
operating in flow mode.
Use the
undo phy-mru command to restore the default.
By default, the MRU of an asynchronous serial interface is 1,700 bytes.
Note that these two commands only apply to interfaces operating in the
asynchronous flow mode.
