Flags -t
-t ifType The -t iftype flag is used to indicate the type of Network interface. It is optional for the following types if interfaces :
- et for IEEE 802.3 Ethernet (inet, xns)
- tr for Token-Ring (inet, xns)
- xt for X.25 (inet)
- sl for serial line IP (inet)
- lo for loopback (inet)
- op for serial (inet)