Configuring X2T 313destination IP address of the X2T route. After that, the router will extract the puredata from the X.25 packet and send them to the IP host through the TCPconnection.The IP host can go through the IP address on the interface of the IP network toaccess the X.25 host. Whenever the router receives a TCP connection request, itchecks the destination IP address and TCP port number of the TCP connection andlooks up in the X2T routing table for a match. If there is a match, the router willset up an X.25 SVC destined to the host at the associated destination X.121address of the X2T route. After that, the router will extract the pure data from theTCP packet and send them to the X.25 host through the X.25 SVC. If the routersets up a PVC connection with X.25 host, it transmits the data directly to X.25host through X.25 PVC.Configuration Procedure To configure X2T, use the following commands:c CAUTION:■ Number of X2T mapping entries varies by device. The maximum number ofentries is 100 by default, including both entries configured using the translateip and translate x25 commands.■ When specifying a port number using the translate ip command, for an IPaddress using one port, specify port 102, for an IP address using multiple ports,specify port numbers from 1024 to 5000 instead of well known port numberssuch as 21, 23 to avoid network failures.To do... Use the command... RemarksEnter system view system-view -Enable X.25 switching x25 switching RequiredConfigure X.25 interface Refer to “Configuring X.25Interface Parameters” onpage 286.RequiredUnnecessary to specify anX.121 address for theinterfaceConfigure IP interface Refer to IP Services volume. RequiredConfigure an X.25-to-IP X2Tforwarding routetranslate x25 x.121-addressip ip-address portport-numberRequiredConfigure anIP-to-X.25X2TforwardingrouteConfigure a PVCforwardingroute for PVClinktranslate ip ip-address portport-number pvcinterface-typeinterface-numberpvc-numberSelect either one.Configure anSVC route and aforwardingroute for SVClinktranslate ip ip-address portport-number x25x.121-addressx25 switch svc [ -number ]x.121-address [ sub-destdestination-address ][ sub-sourcesource-address ] * interfaceinterface-typeinterface-number [ dlcidlci-number ]
