In the VLANIF interface, run the mtu command to set the value ranging from 1501 to 9600. However, the maximum length of Ethernet frames forwarded at Layer 2 is 9216. Therefore, the Layer 3 MTU and Ethernet header cannot exceed 9216. Otherwise, the set value will be discarded.
The default value is 1500.
After setting the maximum transmission unit (MTU) by running the mtu command on a VLANIF interface, this configuration takes effect only for this interface.
Example:
Run the huawei(config-if-vlanif2)#mtu 1560 command.
The detailed information is as follows:
Line protocol current state : UP
huawei(config)#display interface vlanif 2
vlanif2 current state : UP
Description: HUAWEI, SmartAX Series, vlanif2 Interface
The Maximum Transmit Unit is 1560 bytes
Forward plane MTU is 1560 bytes
Internet protocol processing : disabled
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc11-2233
VLAN Encap-mode : double-tag, inner-label is 2
