Most Smarts Interfaces use MIB2 OIDs to report the Administration and Operational status of an interface. These OIDs are ifOperStatus (.1.3.6.1.2.1.2.2.1.8) and ifAdminStatus (.1.3.6.1.2.1.2.2.1.7). The ifDescr (.1.3.6.1.2.1.2.2.1.2) will give the index and description of the interface.
The possible statuses of an Interface for ifAdminStatus include:
1 : up
2 : down
3 : testing
The possible statuses of an Interface for ifOperStatus include:
1 : up
2 : down
3 : testing
4 : unknown
5 : dormant
6 : notPresent
7 : lowerLayerDown