10 CONFIGURATION C OMMANDS FORETHERNET INTERFACES IN ROUTEMODEmtuSyntax mtu sizeundo mtuView Ethernet interface viewParameter size: The value of Maximum Transmission Unit (MTU for short), which varies byinterface type and defaults to 1,500 bytes.■ Fast Ethernet: (FE for short): in the range of 46 bytes to 1,560 bytes■ GigabitEthernet (GE for short) or 10 GE: in the range of 46 bytes to 16,384bytes, with a default value of 1,500 bytes.Description Use the mtu command to configure MTU value.Use the undo mtu command to restore MTU value.n Limited to the QoS queue length (for example, the default length of an FIFO queueis 75), too small an MTU will result in too many fragments, which will be discardedfrom the QoS queue. In this case, you can increase MTU or QoS queue lengthproperly. In Ethernet interface view, you can use qos fifo queue-length tochange the QoS queue length. For detailed configurations, see “qos fifoqueue-length” on page 1809.Example # Configure MTU for Ethernet1/0 to be 1,000 bytes. system-view[Sysname] interface ethernet 1/0[Sysname-Ethernet1/0] mtu 1000timer holdSyntax timer hold secondsundo timer holdView Ethernet interface view
