MIB: OSPF-MIB
The OSPF interface type. By way of a default, this field may be intuited from the corresponding value of ifType.
Broadcast LANs, such as Ethernet and IEEE 802.5, take the value 'broadcast', X.25 and similar
technologies take the value 'nbma', and links that are definitively point-to-point take the value 'pointToPoint'.
Possible values:
1 - Broadcast;
2 - NBMA;
3 - Point to point;
4 - Virtual link;
5 - Point to multipoint.