HP MSR2000/3000/4000 Router Series Interface Command Reference

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Loopback and the clock slave command cannot be set at the same time; otherwise, POS interfaces
cannot be connected successfully.
Examples
# Enable internal loopback on interface POS 5/1.
<Sysname> system-view
[Sysname] interface pos 5/1
[Sysname-Pos5/1] loopback local
Related commands
clock
mtu
Use mtu to set the MTU size of the POS interface.
Use undo mtu to restore the default.
Syntax
mtu size
undo mtu
Default
The MTU of a POS interface is 1500 bytes.
Views
POS interface view
Predefined user roles
network-admin
Parameters
size: Sets the size (in bytes) of the maximum transmission unit (MTU). The value range for this argument
is 128 to 1650.
Usage guidelines
The MTU setting of the POS interface can affect the assembly and fragmentation of IP packets.
After configuring the MTU for a POS interface, you must use the shutdown command and then the undo
shutdown command on the interface to make the configuration take effect.
Examples
# Set the MTU of POS interface 5/1 to 1430 bytes.
<Sysname> system-view
[Sysname] interface pos 5/1
[Sysname-Pos5/1] mtu 1430
reset counters interface
Use reset counters interface to clear the statistics of the specified or all POS interfaces.