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Chapter 8 129
Configuring a X.25 Node
Configure an X.25 Network Interface
HP assigns the network portion (initial nine digits) of
IP addresses from ARPA Class C, though your
addresses may also be of Classes A or B. The complete
formats are:
For Class C, the node portion of the IP address must be
between 001 and 254.
If you are adding your NS 3000/iX node to an existing
network, the network portion of each node’s IP address
should be the same. You will have to find out what this
is, and use it in the network portion of the IP address of
your NS 3000/iX node. Also, you will need to know the
node portions of the IP addresses of each of the nodes
(usually they will be numbered sequentially, such as
001, 002, and so on), so that you can specify a unique
node portion for the IP address of your node. If you
have a network map, it should provide a record of such
items as the node name and IP address of each node. If
there is no record, and if you want to find out each
node’s IP address, you will have to issue the following
command (NM capability required) on each of the
nodes:
NETCONTROL NET=NIname;STATUS
One of the lines of output from this command tells you
what the complete IP address is for that node; the last
three digits are the unique node portion of the class C
address.
IP subnet mask An IP subnet mask is specified in the
same format as an IP address. The
32-bit mask is grouped in octets
expressed as decimal integers and
delimited by either a period (.) or a
space. An IP mask is used when
configuring subnetworks. The mask
identifies which bits of an IP address
will be used to define a subnetwork. To
determine these bits, you first need to
estimate how many subnetworks and
Class A nnn xxx.xxx.xxx
B nnn.nnn xxx.xxx
C nnn.nnn.nnn xxx
Where: nnn = the network portion of the IP address and
xxx = the node portion of the IP address.