Cisco IOS Wide-Area Networking Configuration Guide - Free Books

X.25 and LAPB Configuration ExamplesConfiguring X.25 and LAPBAn outgoing call from the DTE may select any of the local CUGs (1, 2, 3, or 4) or not. When no CUGis selected, it is assumed that the call is intended for the open network. When a CUG is selected, therelated network CUG will be selected when the call is switched to an intranetwork connection. The callwill be refused if it specifies a different local CUG from the one to which the POP is subscribed.An incoming call to the DTE from an intra network connection may select related network CUGs (101,202, 303, or 404) or no CUG. If no CUG is selected, the call is accepted as coming from the opennetwork. A call that requires access to a different CUG will be refused.Router(config)# interface serial0Router(config-if)# encapsulation x25 dceRouter(config-if)# x25 subscribe cug-service incoming-access outgoing-accessRouter(config-if)# x25 subscribe local-cug 1 network-cug 101Router(config-if)# x25 subscribe local-cug 2 network-cug 202Router(config-if)# x25 subscribe local-cug 3 network-cug 303Router(config-if)# x25 subscribe local-cug 4 network-cug 404CUG Selection Facility Suppression for the Preferential CUG ExampleIn the following example, CUG selection facility suppression is configured for the preferential CUGonly on serial interface 0:interface serial0encapsulation x25 dcex25 subscribe cug-service suppress preferentialx25 subscribe local-cug 0 network-cug 10 preferentialx25 subscribe local-cug 50 network-cug 500CUG Selection Facility Suppression for All CUGs ExampleIn the following example, CUG selection facility suppression and incoming access are configured for allCUGs, including the preferential CUG on the X.25 profile:x25 profile CUG-SUPRS-ALL dcex25 subscribe cug-service incoming-access suppress allx25 subscribe local-cug 0 network-cug 10 preferentialx25 subscribe local-cug 20 network-cug 202x25 subscribe local-cug 40 network-cug 40DDN X.25 Configuration ExampleThe following example illustrates how to configure a router interface to run DDN X.25:interface serial 0ip address 192.31.7.50 255.255.255.240encapsulation x25 ddnx25 win 6x25 wout 6x25 ips 1024x25 ops 1024x25 t20 10x25 t21 10x25 t22 10x25 t23 10x25 nvc 2x25 map IP 192.31.7.49 000000010300 BROADCAST80