AI2524 Router Card User’s Manual
Page 12-30 August 1997
2524UM
The X.25 switching subsystem supports these facilities and parame
ters:
zD-bit negotiation—Data packets with the D-bit set are passed
through transparently
zVariable-length interrupt data
zFlow control parameter negotiation
zWindow size up to 7, or 127 for modulo 128 operation
zPacket size up to 4096, if the L APB laye rs u sed are c apable of han-
dling the requested siz
zBasic closed user group selection
zThroughput class negotiation
zReverse charging and fast select
To configure X.25 routing, perform these tasks:
zEnable X.25 Routing
zConfigure a Local X.25 Route
zConfigure XOT (Remote) X.25 Rout
zConfigure a Locally Switched PVC
zConfigure an XOT (Remote) PVC
You may also need to configure additional X.25 routing features, as re-
quired for your network.
Enable X.25 Routing
In global configuration mode, enable X.25 routing to use local switch-
ing or XOT by typing:
x25 routing [use-tcp-if-defs]
The use-tcp-if-defs keyword is used by some routers that re
ceive remote routed calls from older versions of XOT; it might be
needed if the originating router cannot be migrated to a new softwar
release.
Example: X.25 Route Address Pattern Matching
This example shows how to route X.25 calls with addresses whos
first four Data Network Identificatio n Code ( DNIC ) dig its are 111 1 to
interface serial 3, and to change the DNIC field in the addresses pre
sented to the equipment connected to that interface to 2222. The \1 in