312 CHAPTER 14: X.25 AND LAPB CONFIGURATIONConfiguring X2TIntroduction X.25 to TCP switch (X2T) connects X.25 to TCP/IP networks, allowing the accessbetween X.25 and IP hosts.Figure 69 Network diagram for X2TThe X.25 terminal has an X.121 address to the IP host. Whenever the routerreceives an X.25 call request packet, it checks the destination address of X.121 inthe packet and looks up in the X2T routing table for a match. If there is amatching route, the router will set up a TCP connection with the host at theConfigure a PVC route underthe X.25 templatex25 switch pvc pvc-number1interface interface-typeinterface-number [ dlcidlci-number ] pvcpvc-number2 [ option ]RequiredReturn to system view quit -Enter interface view interface interface-typeinterface-number-Configure the link layerprotocol as FRlink-protocol fr[ nonstandard | ietf ]RequiredPPP by defaultConfigure the FR interfacetypefr interface-type { dce | dte |nni }RequiredDTE by defaultConfigure an FR DLCI andenter its viewfr dlci dlci-number RequiredConfigure the FR DLCI asAnnex G DLCIannexg { dce | dte } RequiredApply the X.25 Template tothe Annex G DLCIx25-template name RequiredReturn to system view quit -Enter interface view interface interface-typeinterface-number-Configure the link layerprotocol as X.25link-protocol x25 [ dce|dte ] [ ietf | nonstandard ]RequiredPPP by defaultConfigure a PVC route x25 switch pvc pvc-number1interface interface-typeinterface-number [ dlcidlci-number ] pvcpvc-number2 [ option ]RequiredTo do... Use the command... RemarksRouterX.25LAPBX.25LAPBPhysical Layer Physical LayerData Link LayerX2TIPData Link LayerIPTCPTCPTCPX.25 terminal IP host
