The X.25 Configuration screen (#48) in Figure
8-2 "NS Configuration Screen" is displayed when you press the [Config
Network] key at the Network Transport Configuration screen (#42) with an NI
type of 3 (X.25). Refer to Chapter 5 "Introductory
Screens" for information on the Network Transport Configuration screen.
Figure 8-2 NS Configuration Screen
In the IP address field, enter the internet protocol (IP)
address for the node being configured. An example of an address is:
C 192.191.191 009.
The IP subnet mask is optional. If entering one, tab to the IP
subnet mask field and enter the number in the same format as an
IP address.
Move to the first Link name field. Enter a link name to
represent the DTC/X.25 Network Access card for which you are
configuring a link. This name must be unique to both the node and the
DTC. It must also be the same as the link name configured for this
card when the Datacommunications and Terminal Subsystem (DTS) was
configured.
Enter the node name of the DTC that houses the DTC/X.25 Access
card in the first DTC Node Name field then enter the slot
number of the card in the Card Number field. Enter a link
name, DTC node name, and card number for each link you are
configuring.
When you are done adding links, press the [Save Data]
key.
If the network that this node is on contains ANY internetwork
gateway (either full or half) press the [Neighbor Gateways]
key and proceed to the section in this chapter called "To Configure
Neighbor Gateways."
If the network that this node is on contains NO internetwork
gateways or if you have already configured gateways for this system,
press the [Config Directry] key and proceed to the section in
this chapter titled "To Configure X.25 Virtual Circuits."
Optional Keys
Press the [List NIs] key to list the names and types of already
configured network interfaces.
Press the [Delete NI] key to remove a configured network interface
from the configuration file.
Press the [Read Other NI] key to call up a previously configured
Network Interface name.
Fields
Node Name
Display only.
Network Interface (NI) name
Display only.
IP address
IP address is an address of a node on a network. An IP address has two
parts: a network portion and a node portion. The network portion
must be the same for all nodes on an X.25 network; the node
portion must be unique for all nodes on an X.25 network.
There are two methods of entering an internet protocol (IP) address
within NMMGR:
Enter the fully qualified IP address (for example, Class C,
C 192.191.191 009).
OR
Enter only the network (nnn) and node (xxx)
portions of the IP address as four positive integers between
0 and 255 separated by periods or blanks (for
example, 15.123.44.98).
You need not enter the following items as NMMGR will fill these in:
Class A, B, C
Leading zeros for the network and node portion of the IP
address.
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:
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.
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 nodes per subnetwork you need.
See Chapter 2 "Networking Concepts" for details
on deriving an IP subnet mask.
Link Name
The link name identifies a specific DTC/X.25 Network Access card to be
used for X.25 system-to-system connections. This link name must be the
same as the link name you entered for this card when you configured your
DTCs. You may configure up to 11 links. (One link must be used for
loopback. Loopback will be automatically configured during the guided
screen configuration.)
DTC Node Name
The DTC node name is the fully qualified nodename
(name.domain.organization) of the DTC that contains the DTC/X.25
Network Access card with the configured link name.
Card Number
The DTC card number is the number of the DTC/X.25 Network Access card
in the associated DTC. If the card is contained in a DTC 48, the DTC card
number can be any number from 1 to 5. If the card is contained in a DTC
16, the card number must be 2.
In the Remote node name field, type in the nodename of
each remote X.25 node on your network in the format
nodename.domain.organization. Also, if you need to be able
to perform a loopback DSLINE command to the local node, then
enter the local node's name here as well.
For each node, type the IP address of the node in the Remote
IP address field.
To specify that calls can be made to a node, enter its address key
in the Address key field. Enter the node portion of
the remote node's configured nodename.
NOTE: An address key called POOL is already preconfigured for
you though it doesn't show up on the screen. POOL allows the node
being configured to receive any incoming calls even if the remote
system's address is not configured on this screen. POOL will also
allow you to use NetIPC to programmatically provide an X.25 address that is not
configured on this screen. If you want to delete the POOL address key,
in the last line of the X.25 Virtual Circuit Configuration screen enter a
3 (for switched VCs) and press the [Go To] key. That brings you
to the X.25 SVC Address Key Paths screen where you can then remove the default
name POOL by typing over it with spaces and then saving the data.
If the address type is a switched virtual circuit complete steps a
through c, but if the address type is a permanent virtual circuit,
skip to step 5.
In the Remote X.25 address field, enter the X.25
address of the remote host for X.25 public data networks or
private networks.
Make sure the name of the facility set you are using is in
the Facility set field. You may either choose the
default facility set (STDSFSET) or enter an
alternative. If you are configuring a new facility set, enter a
new name. (To modify facility set parameters, enter a
5 in the last field on the screen and press the
[Go To] key.)
In the Security class field, enter the level of
logical security you want to have on this particular entry. The
possible values are IN (accept calls from the address),
IO (accept calls from and send calls to the address,
default), OU (send calls to the address, incoming
calls are rejected), and LK (block calls to or from
the address).
If the address type is a permanent virtual circuit (PVC), in the
Permanent VC number field, enter the PVC number of the PVC
on the remote node. This value cannot be greater than the number of
PVCs for which you are subscribed. It must be within the PVC range
you defined during DTC configuration.
After you have finished entering new information for each remote
node, press the [Save Data] key. (Press the key once for each
remote node you are configuring.)
If you have completed configuration of X.25, press the
[Validate Netxport] key and proceed to
Chapter 10 "Validating and Cross-Validating with
SYSGEN" Otherwise, press the [Prior Screen] key to return
to the X.25 Configuration screen.
Fields
Network directory name
The network directory file that will be updated by the information
entered through this screen.
Remote node name
You must enter the remote node name of each X.25 node into the network
directory. Include entries for all remote nodes and, if you want to be
able to perform loopback, the local node as well.
Remote IP address
Also in the network directory, you must enter the IP Address of each
node whose identity you have entered into the network directory. For the
format of this parameter, see the information in the "Fields" section
under "Configure X.25 Network."
Address key
The X.25 address key is the name of a remote node with which your
local node will be communicating. Hewlett-Packard recommends that you
make the name be the node portion of the remote node's name (where its
full name is node.domain.organization). You must configure an
X.25 address key for each remote node with which your node will be
communicating. You have a combined maximum of 1024 X.25 address keys in
the SVC and PVC path tables. The X.25 address key name must be eight
characters or less and the first character must be alphabetic. A default
address key called POOL allows any system to access the local
system even if the remote system's address is not configured.
POOL can also be used when level 3 programmatic access (NetIPC)
provides an X.25 address.
Network Interface (NI) name
Display only.
SVC or PVC Parameters
The parameters for assigning either SVCs or PVCs are described in the
following paragraphs.
For SVCs
Remote X.25 address
The remote X.25 address is the remote node's X.25 address. This
address is required for SVCs if you have specified an X.25 address key.
This address must be 15 digits or less.
Facility set
The facility set name is a name for a set of X.25 connection
parameters. The parameters are determined by the type of X.25 network
that you are subscribed to. You can configure options in a facility set
so that specified options are available for every virtual circuit or
negotiated for each virtual circuit on a per-call basis. This facility
set will be used when a connection is made from your node to the
specified remote node or from the specified remote node to your node. A
Facility Set is required for SVCs if you have specified an X.25 Address
Key. The facility set name must be eight characters or less, and the
first character must be alphabetic. You can configure up to 128 facility
sets.
To modify facility set parameters, enter a 5 in the field at the
bottom of the screen and press the [Go To] key. This will take you
to the X.25 User Facility Sets screen. From this screen you can create
new or modify existing user facility sets. See the NS 3000/iX Screens
Reference Manual for more information.
Security class
The security class is the level of logical security you want to have
when a connection is made to or from the specified remote node. A
Security level is required for SVCs if you have specified an X.25 Address
Key. The possible values are as follows:
IO — Both incoming and outgoing calls are
accepted. This is the default value.
IN — Only incoming calls are accepted from this
particular remote address. Outgoing calls will be rejected.
OU — Only outgoing calls are accepted to this
particular remote address. Incoming calls will be rejected.
LK — Entry is locked. No call is accepted, either
inbound or outbound.
For PVCs
Permanent VC number
The PVC Number identifies a permanent virtual circuit (PVC) on the
remote node. If you have entered a name in the X.25 Address Key field and
are configuring PVCs, then you also have to enter a value for the PVC
Number.