Setting MTU for an interface
When a packet exceeds the MTU of the output interface, the device processes it in one of the following ways:
If the packet disallows fragmentation, the device discards it.
If the packet allows fragmentation, the device fragments it and forwards the fragments.
Fragmentation and reassembling consume system resources, so set the appropriate MTU for an interface based on the network environment to avoid fragmentation.
To set the MTU for an interface:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Set the MTU for the interface. | ip mtu mtu-size | By default, the MTU is not set. |