Point-to-Point Reachable Nodes

The Point-to-Point Reachable Nodes screen (#99) shown in Figure 6-15 “Point-to-Point Reachable Nodes Screen” is used to configure the route characteristics to a destination node on the point-to-point network. You must configure one mapping (i.e., one entry in this screen) for each node that you want to reach. The name of the link connecting this node to the adjacent node is what you enter in the Link Name field of this screen. Because at least one route should be defined to every other node on the network, this screen will be completed at least as many times as there are other nodes in the point-to-point network. There may be multiple routes to a destination node. If the routes are through different adjacent nodes, a mapping must be configured for each of them.

The screen shown is displayed when you select a route name at the Point-to-Point Mapping Configuration screen (Figure 6-13 “Point-to-Point Mapping Configuration Screen”) and press the [Add] or [Modify] function key. It is also displayed when you type the path name:

@NETXPORT.NI.NIname.MAPPING.mapentry

in the Command window of any screen and press the [Enter] key, where NIname is the configured point-to-point NI name, and mapentry is a configured route name.

Figure 6-15 Point-to-Point Reachable Nodes Screen

Press the [Save Data] function key to transfer the data displayed on the screen to the configuration file you are creating or updating. Verify that the data record has been created by checking that the Data flag is set to Y.

Fields

Destination IP internet address

This is the internet address of the destination node to which a route is being defined.

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.

Addresses are made up of a network portion and a node portion. The supported classes of network addresses have the following forms (note the spaces must appear where indicated):

Class C:: C nnn.nnn.nnn xxx
Class B:: B nnn.nnn xxx.xxx
Class A:: A nnn xxx.xxx.xxx

where nnn is a value ranging from 000 to 255, representing eight bits of the network portion of an address and xxx is a value ranging from 000 to 255, representing node portion of the address. Note the network and node values of all zeros are not allowed. These are special values.

The leftmost group of nnn has the following ranges for each address class:

Class C:: 192-223
Class B:: 128-191
Class A:: 001-126

If the link specified in the Link Name field is the only link configured for this network interface and is not a shared dial link, you can enter a "wildcard" symbol by specifying an "at sign" (@) in place of the IP address. The @ in this field indicates that multiple non-adjacent point-to-point nodes on this network can be reached via the link specified in the link name field. (Non-adjacent links are not allowed to use a shared dial link.) Using the @ wildcard enables you to configure this screen only once for all non-adjacent nodes reachable by the specified link. Use the @ only if the link specified is the only link for this network interface. The @ must be left-justified in the IP internet address field. Make sure you separately configure the mapping to the adjacent node from which the non-adjacent nodes can be reached.

For example, Figure 6-16 “Using an @ for Mapping Configuration” shows a point-to-point network. From node A, all other nodes on the network must be reached through node B. During configuration of node A, the @ could be entered to indicate that all communication to non-adjacent nodes originating from A must be routed through node B (over Link 1). In addition to this mapping, one mapping would have to be configured at node A: the mapping from node A to the adjacent node B.

Default value: None

Figure 6-16 Using an @ for Mapping Configuration

List name

The name of the link on this node over which packets to the destination node must be sent. The name of the link is configured separately (see related screens).

Related screens:

NETXPORT.NI.NIname.LINK
This screen configures the link name.
LINK.linkname
This screen configures link attributes.

Default value: None

Adjacent (0) / Non-adjacent (1)

This field indicates whether the destination is an adjacent node to the node being configured (0) or if it is non-adjacent, i.e., the destination must be accessed through intermediate nodes (1).

Default value: None

Range: 0 or 1

Entry priority

This field is useful when alternate routes are configured to a destination node. It is the primary means of influencing the choice of route over the point-to-point network. Priority is considered before any other route characteristic (direct connect link, dial connection, number of hops, etc.) in choosing a route. Links having higher priority values are chosen over lower priority links. A default value of 50 allows for the addition of either lower or higher priority nodes or routes.

Default value: 50

Range: 1-99

Phone number

This is the telephone number of the destination node. It is required if the destination is local and the link is a dial link. Enter the telephone number as a combination of decimal numbers (0 through 9), dashes, and the following special characters:

/: Separator used for automatic call units that have second dial-tone detect.
E: Optional end-of-number indicator.
D: One second delay (used for European modems and automatic call units that require built-in delays).
#: Defined by local phone system.
*: Defined by local phone system.

Enter ! to disable outbound dialing. A ! is required if the destination node is a personal computer.

You can have 4096 unique phone numbers in your NM configuration file.

Default value: None

Security String

This is the security string of the destination node. It is relevant only if all of the following are true: the destination is local, the link is a dial link, DIAL ID protocol is enabled, and security is enabled. It is ignored when security is not enabled at the local node. The security string can contain as many as eight alphanumeric characters. It must be left justified and contain no embedded blanks.

Related screens:

NETXPORT.NI.NIname.LINK.linkname
Dial ID protocol is enabled/disabled on this screen.
NETXPORT.NI.NIname.PROTOCOL.DIAL
Security validation is enabled/disabled on this screen.

Default value: HP

Next hop IP internet address

This parameter specifies the correct path for a message to take when there is more than a single hop between the sending node and the destination.

Default value: None

Route disabled (Y/N)

Use this field to disable routing to the remote node. Disabling routing might be useful if you are testing another link and want to temporarily disable this one.

Default value: N

Range: Y or N

Point-to-Point Reachable Nodes

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Fields