Closing a Connection

The local node closes a connection to a remote station:

• If the system administrator manually deactivates the connection.
• If the connection is configured as on-demand and no 3270 or LU6.2 sessions are active.
• If an outage has been reported by the SNALink.

The local node closes a connection by sending a Close(LINK) message. The SNALink then takes some action, such as lowering DTR (data terminal ready) on an SDLC link or issuing a DLC_CLOSE_STATION on a 802.2 connection. It then replies with a Close(LINK) OK Response as shown in the following figure.

The case of multipoint connections is slightly different and is considered in SDLC Multipoint Connections. The rest of this section is concerned with point-to-point connections.