This object specifies the layer 2 protocol to be employed
by the line, and more specifically the encapsulation type:
- frf
Specifies the frame relay layer 2 protocol defined by
FRF.8. Observe that the encapsulation can be selected
per virtual circuit.
- pppMuxCisco
Specifies the PPP using Cisco proprietary virtual circuit
multiplexed encapsulation.
- pppMuxIetf
Specifies the PPP using virtual circuit multiplexed
encapsulation defined by RFC-2364.
- pppLlcIetf
Specifies the PPP using the LLC (Link Layer Control)
encapsulation defined by RFC-2364.