157link-protocolSyntax link-protocol { fr [ nonstandard | ietf | mfr interface-number | nonstandard ] | hdlc |ppp }View POS interface viewParameter fr: Specifies Frame Relay as the link layer protocol of the interface.ietf: Adopts the IETF encapsulation format. This is the default.mfr interface-number: MFR interface or subinterface number. The specifiedinterface must be one that already exists.nonstandard: Adopts non-standard compatible encapsulation format.hdlc: Specifies HDLC as the link layer protocol of the interface.ppp: Specifies PPP as the link layer protocol of the interface.Description Use the link-protocol command to set the link layer protocol of the interface.By default, PPP is used.Example # Specify HDLC as the link protocol of interface POS 1/0. system-view[Sysname] interface pos 1/0[Sysname-Pos1/0] link-protocol hdlcloopbackSyntax loopback { local | remote }undo loopbackView POS interface viewParameter local: Internal loopback.remote: External loopback.Description Use the loopback command to enable loopback for a POS interface.Use the undo loopback command to disable loopback.By default, loopback is disabled.Loopback is intended for test use. Disable it otherwise.
