79 system-view[Sysname] interface Serial 4/1/8:10[Sysname-Serial4/1/8:10] fr map ip 202.38.163.252 50interface serialSyntaxinterface serial interface-number.subnumber [ p2mp | p2p ]undo interface serial interface-number.subnumberViewSystem viewDefault level2: System levelParametersinterface-number: Main interface number.subnumber: Subinterface number, in the range 0 to 1023..p2p: Point-to-point subinterface.p2mp: Point-to-multipoint subinterface.DescriptionUse the interface serial command to create a subinterface and enter the subinterface view.Use the undo interface serial command to delete a subinterface.By default, no frame relay subinterface exists. Frame relay subinterfaces are in p2mp mode by default.Examples# Configure a point-to-point subinterface Serial 4/1/8:10.10. system-view[Sysname] interface Serial 4/1/8:10.10 p2p[Sysname-Serial4/1/8:10.10]link-protocol frSyntaxlink-protocol fr [ ietf | nonstandard ]ViewInterface viewDefault level2: System levelParametersietf: Default encapsulation format according to the Internet Engineering Task Force (IETF) standard.nonstandard: Nonstandard compatible encapsulation format.