Defining Connectivity Components

Defining Ports, DLCs, and Connection Networks

Defining Ports, DLCs, and Connection Networks

A port represents the local end of a communications link as a unique access point in the network. Each port is associated with a specific link protocol, which can be any of the following:

SDLC

Token ring

Ethernet

FDDI

X.25 or QLLC (qualified logical link control)

You can configure more than one port that uses a particular link protocol. In general, a port corresponds to a single physical access point such as an adapter card, but some link protocols (such as token ring) enable you to define multiple ports for a single adapter. The different ports are distinguished by addresses (such as the SAP number).

When you use the Motif administration program to define a port for a particular link protocol, SNAplus2 automatically defines a DLC for the port if a DLC of that type has not already been defined. For command-line configuration, you must define the port and DLC using different commands.

In an APPN network using token ring, Ethernet, or FDDI link protocols, you can also use the SAP Configuration dialog to indicate that the port is part of a connection network.

If you are using PU concentration, you can define a template that is used to generate definitions for implicit link stations (link stations that are not explicitly configured). Implicit link stations can support downstream LUs. If implicit PU fields are modified while the port is active, the changes affect any implicit link station instances generated after the change.

To configure a port, connection network, and DLC, use one of the following methods:

Motif administration program

Chapter 5

147