3com MSR 20-20 참조 매뉴얼

C

HAPTER

 11: F

UNDAMENTAL

 S

ERIAL

 I

NTERFACE

 C

ONFIGURATION

 C

OMMANDS

# 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 { async | sync }

Serial interface view

async: Sets the synchronous/asynchronous serial interface to operate in 
asynchronous mode.

sync: Sets the synchronous/asynchronous serial interface to operate in 
synchronous mode.

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.

# 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 size

Asynchronous serial interface view, AUX interface view

size: Maximum receive unit (MRU) to be set, in the range 4 to 1,700 (in bytes).

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.