Configure MTU size per OSPF interface
This parameter has the following values/meanings:
1 - Use the MTU specified by IP
2 - Use the MTU of ethernet, regardless of what IP
says
> 2 - Use this value as the actual MTU.
If the value is smaller than what OSPF needs as
a minimum then the mtu specified by IP is used.
For example, 3 would never be used as an MTU.