Configuring and Managing Host-Based X.25 Links - Edition 6 (36939-90057)

Introduction
Configuring PAD Support and PAD Security
Chapter 1
30
Configuring X.25 System-to-System Switching
This section explains the principles of configuring X.25 connections between MPE/iX
systems (system-to-system switching). The System-to System Switching table allows
MPE/iX systems to access each other and other systems via X.25. The table maps
nodenames configured in NMMGR on a host system to X.25 addresses. If there are no
entries in the list, system-to-system switching is not allowed.
When the DTC receives an incoming call, it looks up the called address in this table, and
routes the call to the appropriate host and network interface using the nodename and
link name mapped to the called address. For outgoing calls from this node and link, the
calling address will be the address listed in the X.25 address field.
• XLDD.D.O will be connected to XLA.D.O using X25LINKif the packet has called
address 12345601.
• 12345602 cannot be accessed by other MPE/iX systems.
Table 1-2 PAD Security Connection Examples
@ 98765404 connects directly to GG3.5.COM
@ 987654 connects to the DTC suer interface
DTC> connect NODE4.D.O this establishes the connection to GG3.5.COM
@98765401 descret Connects directly to NODE1.D.O, giving the password
for PAD access (assuming there is a password).
If a password is required but is not present in the call
user data received by the STC, the DTC will prompt the
user for the password.