H3C SR6600 Command Reference Manual

Also see for SR6600 SPE-FWM: Configuration guide Configuration guide Configuration guide Command reference Command reference

1-36ViewLayer 3 Ethernet interface view, Layer 3 Ethernet subinterface viewDefault Level2: System levelParameterssize: Maximum Transmission Unit (MTU) to be set (in bytes), in the range 46 to 1580. The systemdefault is 1500 bytes.DescriptionUse the mtu command to set the MTU for an Ethernet interface/subinterface.Use the undo mtu command to restore the default.z As the size of MTU decreases, the number of fragments grows. When setting MTU for an interface,you should consider QoS queue lengths (for example, the default FIFO queue length is 75) to avoida too small MTU causing packet drop in QoS queuing. To achieve the best result, you can tuneMTU with the mtu command or QoS queue lengths with the qos fifo queue-length command. Formore information, see QoS in the ACL and QoS Command Reference.z The RT-MIM-2GBE-H3 interface module supports a maximum MTU of 1500 bytes. If you set theMTU higher than 1500 bytes, some packets may fail to be sent.Examples# Set the MTU to 1430 bytes for the Layer 3 Ethernet interface GigabitEthernet 4/0/0. system-view[Sysname] interface gigabitethernet 4/0/0[Sysname- GigabitEthernet4/0/0] mtu 1430# Set the MTU to 1680 bytes for the Layer 3 Ethernet subinterface GigabitEthernet 4/0/0.1. system-view[Sysname] interface gigabitethernet 4/0/0.1[Sysname- GigabitEthernet4/0/0.1] mtu 1680sub-interface rate-statisticSyntaxsub-interface rate-statisticundo sub-interface rate-statisticViewLayer 3 Ethernet interface viewDefault Level2: System level