86 CHAPTER 2: POS INTERFACE CONFIGURATIONConnecting RoutersThrough POS InterfacesAcross Frame RelayNetwork requirementsConnect routers to a public Frame Relay network through POS interfaces. Therouters are premise equipment that work as DTE side of Frame Relay.Router A uses Frame Relay sub-interfaces to connect Router B and Router C indifferent network segments.Network diagramFigure 4 Network diagram for POS interface connection across Frame RelayConfiguration procedure1 Configure Router A# Configure POS interface 1/0. system-view[RouterA] interface pos 1/0[RouterA-Pos1/0] clock slave# Configure Frame Relay encapsulation on the interface.[RouterA-Pos1/0] link-protocol fr[RouterA-Pos1/0] fr interface-type dte[RouterA-Pos1/0] quit# Create sub-interface 1 on the interface.[RouterA] interface pos 1/0.1[RouterA-Pos1/0.1] ip address 10.10.10.1 255.255.255.0[RouterA-Pos1/0.1] fr map ip 10.10.10.2 50[RouterA-Pos1/0.1] mtu 1500[RouterA-Pos1/0.1] quit# Create sub-interface 2 on the interface.[RouterA] interface pos 1/0.2[RouterA-Pos1/0.2] ip address 20.10.10.1 255.255.255.0[RouterA-Pos1/0.2] fr map ip 20.10.10.2 60[RouterA-Pos1/0.2] mtu 1500[RouterA-Pos1/0.2] quit2 Configure Router BFRRouter A Router BRouter CPOS 1/0.110.10.10.1/24DLCI=50POS1 /010 .10 .10 .2/24DLCI=70POS 1/0.220 .10 .10 .1/24DLCI=60 POS1/020 .10.10.2/24DLCI=80
