TCP/IP Configuration and Management Manual

Configuring the NonStop TCP/IP Subsystem
TCP/IP Configuration and Management Manual—427132-004
3-15
Configuration 3: Startup Files for Two Hosts Using
an X25AM-Based Connection
Configuration 3: Startup Files for Two Hosts Using an
X25AM-Based Connection
This subsection describes how to configure NonStop TCP/IP hosts that connect
through an X.25-based network.
Figure 3-4 illustrates an X.25 public data network (PDN) that connects a local NonStop
TCP/IP host (\LA) to a remote NonStop TCP/IP host (\NY) across the country in New
York. To make this connection possible, each host is given both an IP address and an
X.121 source address.
\LA has the following two addresses:

IP address: 128.30.224.11

X.121 source address: 00000011300000
\NY has the following two addresses

IP address: 128.30.224.12

X.121 source address: 00000012300000
Sample startup files are provided for each side of the connection shown in the figure.
These files show both NonStop TCP/IP and X25AM configuration steps, including the
step that each host uses to map the IP and X.121 addresses for its destination. Note
that the sample configuration does not show the HOSTS files for \LA and \NY. For
example HOSTS files, see The HOSTS File on page 3-7 in Configuration 1: Startup
Files for a Host in a Basic NonStop TCP/IP Environment and The HOSTS File on
page 3-11 in Configuration 2: Startup Files for a Host in a Subnet Addressing
Environment.
Before proceeding, look closely at the details of \LA and \NY.

Each host (\LA and \NY) physically connects to an X.25 network through a line on
a SWAN concentrator. \LA1 uses line $X250 and \NY uses line $X25A.
Figure 3-4. NonStop TCP/IP Hosts Connected Through an X.25 Network
\LA \NY
X25
Network
Source address:
00000011300000
Source address:
00000012300000
IP address:
128.30.224.11
IP address:
128.30.224.12
VST500.vsd