Cisco IOS Wide-Area Networking Configuration Guide - Free Books

CommandRouter(config-if)# x25 pvc circuit rbp local portport [packetsize in-size out-size] [recordsizesize] [windowsize in-size out-size]PurposeConfigures the router to establish a TCP session to a specifiedTCP host and port in response to incoming data on an X.25 PVCand to use the RBP protocol over that TCP session to transfer databetween the TCP host and the X.25 PVC.• The local TCP port number must be unique, with theexception that the same TCP port number may be configuredonce on each of multiple X.25 interfaces that will not beactive simultaneously; this includes the case in which oneX.25 interface is configured as a backup interface for anotherX.25 interface.• When a PVC is configured to use RBP, the VC must beunique. Multiple commands referencing the same VC(matching logical channel identifier and interface) are notpermitted.When the x25 pvc rbp local command is configured, the router will listen for a TCP connection requestto the configured TCP port. Until the connection request is received, any data packets received on theX.25 PVC will cause the PVC to be reset. When the TCP connection request is received, the connectionwill be accepted, and the router will send an X.25 reset packet over the configured X.25 destinationcircuit. If the reset packet is not acknowledged, the TCP connection will be closed. Since this commandis associated with a specific X.25 circuit, only one connection may be active per command.Configuring SVCs to Use RBP for Incoming TCP ConnectionsTo configure the router to establish X.25 circuits in response to incoming TCP connections, and to useRBP to transfer data between the TCP session and the corresponding X.25 circuit, use the followingcommand in interface configuration mode:CommandRouter(config-if)# x25 map rbp x121-address [cudstring] local port port [cug group-number][packetsize in-size out-size] [recordsize size][reverse] [roa name] [throughput in out][transit-delay milliseconds] [windowsize in-sizeout-size]PurposeConfigures the router to establish X.25 circuits in response toincoming TCP connections on a specified TCP port and to useRBP to transfer data between the TCP session and thecorresponding X.25 circuit.• The local TCP port number must be unique, with theexception that the same TCP port number may be configuredonce on each of multiple X.25 interfaces that will not beactive simultaneously; this includes the case in which oneX.25 interface is configured as a backup interface for anotherX.25 interface.When the x25 map rbp local port command is configured, the router will listen for a TCP connectionrequest to the configured TCP port. When the connection is accepted, the router will place an X.25 callusing the configured X.25 destination interface, destination address, and call user data. If the call is not7