AIS AI2524 user manual 3X.25 Route Address Pattern Matching, Configure a Local X.25 Route

Chapter 12: AI2524 X.25 Configuration Steps

the rewrite pattern indicates the portion of the original address matched by the digits following the 1111 DNIC.

x25 route ^1111(.*) substitute-dest 2222\1 interface serial 3

Figure 12-3 shows a more contrived command intended to illustrate the power of the rewriting scheme.

Figure 12-3:X.25 Route Address Pattern Matching

The command in Figure 12-3 causes all X.25 calls with 14-digit called addresses to be routed through interface serial 0. The incoming DNIC field is moved to the end of the address. The fifth, sixth, ninth, and tenth digits are deleted, and the thirteenth and fourteenth are moved before the eleventh and twelfth.

Configure a Local X.25 Route

When an incoming call needs to be forwarded, two fields in the X.25 routing table are consulted to determine a local X.25 route:

zDestination X.121 address

zX.25 packet's CUD field (optional)

When the destination address and the CUD of the incoming packet fit the X.121 and CUD patterns in the routing table, the call is forwarded. Forwarding to a specified interface is called local routing or local switching.

To configure a local X.25 route, thus adding the local route to the rout- ing table, type (in global configuration mode):

x25 route [#position] x121-address [cud pattern] interface type number

August 1997	Page 12-31
2524UM