Change the IPv6 MTU Value

About this task

You can change the MTU value globally and at the interface level. The value at the interface has precedence over the global value.

Access global configuration mode.
```
device# configure terminal
```
Change the MTU globally.
```
device(config)# ip mtu 2000
```
The ip mtu command configures both IPv4 and IPv6 MTU.
Access interface Ethernet configuration mode.
```
device(config)# interface ethernet 0/1
```
Change the MTU for the interface.
```
device(conf-if-eth-0/1)# ip mtu 1300
```