Configuring and Managing Host-Based X.25 Links - Edition 5 (36939-90054)
30 Chapter2
Preparing to Configure DTCs
Defining the DTC
DTC IP Address
(optional) The internet protocol (IP) address of the DTC. The IP
address is optional. It is used if your HP 3000 is
configured as part of a network and you want the DTC
to be able to respond to PING/iX requests.
An IP address is made up of a network portion and a
node portion. The address is formed as four fields of
decimal numbers where each number is a value
ranging from 000 to 255.
The following shows examples of three classes of IP
addresses:
Class A: nnn.xxx.xxx.xxx
Class B: nnn.nnn.xxx.xxx
Class C: nnn.nnn.nnn.xxx
where nnn represents the network portion and xxx
represents the node portion of the address. The class of
the IP address is determined by the value of the left
most group of nnn and has the following ranges:
Class A: 001—126
Class B: 128—191
Class C: 192—254
Network and node portions of all zeroes or 255 are not
allowed for DTC addresses. These are special values.
All devices configured with the same network portion
are considered to be on the same network. The node
portion must be unique for all nodes on a network.
You can obtain a Class B or Class C IP address from:
Government Systems, Inc.
Attn: Network Information Center
7990 Boeing Ct.
Vienna, VA 22183
(800) 364-3642 or FAX: (703) 821-6161
For DTC 16RX access to an HP 3000 in an MPE/iX
host-based management environment, the IP address
of the DTC 16RX is configured using the DTC 16RX
Manager on the HP 9000 host and not on the HP 3000.
Any value entered for the DTC 16RX in NMMGR will
be ignored.