R0106-HP MSR Router Series Interface Command Reference(V7)

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Syntax
mtu size
undo mtu
Default
The MTU of an interface is 1500 bytes.
Views
Serial interface view, asynchronous interface view, synchronous/asynchronous serial interface view
Predefined user roles
network-admin
Parameters
size: Sets the maximum transmission unit (MTU) in bytes. The value range for this argument is 128 to
1650 .
Usage guidelines
The MTU setting affects IP packet assembly and fragmentation on the interface.
After configuring the MTU for a WAN interface, you must use the shutdown command and then the undo
shutdown command on the interface for the modification to take effect.
Examples
# Set the MTU of Serial 2/1/0 to 1430 bytes.
<Sysname> system-view
[Sysname] interface serial 2/1/0
[Sysname-Serial2/1/0] mtu 1430
# Set the MTU of Async 2/4/0 to 1430 bytes.
<Sysname> system-view
[Sysname] interface async 2/4/0
[Sysname-Async2/4/0] mtu 1430
phy-mru
Use phy-mru to set the MRU for an asynchronous serial interface operating in flow mode.
Use undo phy-mru to restore the default.
Syntax
phy-mru mrusize
undo phy-mru
Default
The MRU of an asynchronous serial interface is 1700 bytes.
Views
Asynchronous serial interface view, synchronous/asynchronous serial interface view
Predefined user roles
network-admin