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Defining Connectivity Components
Defining Link StationsDefining Link Stations
To communicate with other nodes in an SNA network, you must configure the characteristics of a link station (LS) to an adjacent node in the SNA network. Before you can define a link station, you must define a port for the adapter (and link protocol) you are using. Most of the information needed to configure a link station is the same, whatever protocol is being used.
A link station represents the logical path through the SNA network between the SNAplus2 local node and a remote computer. The remote computer can be any of the following:
• A host computer, on which SNAplus2 accesses a host program using 3270, RJE, or LUA communications (or uses APPC or
• A peer computer, with SNAplus2 and the remote computer communicating as equal partners (the typical arrangement in an APPN network)
• A downstream computer that uses the SNAplus2 PU concentration
| feature or DLUR feature in order to access a host |
| A link station is associated with a specific port; you can define one or |
| more link stations on each port. |
| Each link station that supports dependent traffic has an associated PU |
| (physical unit). Because PUs are associated with link stations, SNAplus2 |
| does not treat them as separate resources; they are configured as part of |
| link station configuration, and are started and stopped as part of |
| starting and stopping link stations. Link stations are shown in the |
| connectivity section of the Node window; PUs are not shown in any |
| window. |
| In most circumstances, you need to add a link station to the port. |
NOTE | |
| However, if you want to use a dynamically created link station for APPC |
| traffic only, for situations in which the link is always activated from the |
| remote node, you do not need to explicitly configure one. |
| If a remote node attempts to connect to the local node, but no link station |
| is defined that matches the address specified on the incoming call, |
| SNAplus2 can define one implicitly if a suitable port has been defined on |
154 | Chapter 5 |