HP MSR2000/3000/4000 Router Series Interface Command Reference

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Syntax
mtu size
undo mtu
Default
The MTU of an interface is 1500 bytes.
Views
Asynchronous interface view, serial sub interface view, synchronous/asynchronous interface view
Predefined user roles
network-admin
Parameters
size: Maximum transmission unit (MTU) in the range of 128 to 1650 bytes.
Usage guidelines
The MTU setting can affect IP packets assembly and fragmentation on the interface.
When you use the mtu command on a WAN interface, execute the shutdown command, and then the
undo shutdown command to make your configuration take effect.
Examples
# Set the MTU of interface Serial 2/0 to 1430 bytes.
<Sysname> system-view
[Sysname] interface serial 2/0
[Sysname-Serial2/0] mtu 1430
# Set the MTU of interface Async 6/4/0 to 1430 bytes.
<Sysname> system-view
[Sysname] interface async 6/4/0
[Sysname-Async6/4/0] 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 interface view
Predefined user roles
network-admin