This object identifies the 'link' type.
feeder(1) is applicable when cwtFeederType contains
a value other than fdrNON(12). xLMI(2) is applicable
only when cwtFeederType contains a value of fdrNON(12).
Both feeder(1) and xLMI(2) are CISCO proprietary
interfaces. xLMI stands for 'extended local management
interface.