HP MSR2000/3000/4000 Router Series Interface Command Reference

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Argument MSR2000 MSR3000 MSR4000
size 46 to 1560 46 to 1560
• On Layer 3 Ethernet interfaces and
subinterfaces: 46 to 1560
• On 10-GE interfaces: 46 to 9600
Usage guidelines
As the MTU size decreases, the number of fragments grows. When you set the MTU for an interface, you
should consider QoS queue lengths (for example, the default FIFO queue length is 75) to prevent a too
small MTU from causing packet drops in QoS queuing. To achieve the best result, you can tune the MTU
with the mtu command or tune QoS queue lengths with the qos fifo queue-length command. For more
information about the qos fifo queue-length command, see ACL and QoS Command Reference.
Examples
# Set the MTU to 1430 bytes for Layer 3 Ethernet interface Ethernet 2/1.
<Sysname> system-view
[Sysname] interface ethernet 2/1
[Sysname-Ethernet2/1] mtu 1430
# Set the MTU to 1400 bytes for Layer 3 Ethernet subinterface Ethernet 2/1.1.
<Sysname> system-view
[Sysname] interface ethernet 2/1.1
[Sysname-Ethernet2/1.1] mtu 1430