Twinax Connections Fail When Using SNA Server 3.0 and 3.0 SP1

MORE INFORMATION

The problem is that twinaxial connections are not saved with all of the connection properties that other Peer connections include, such as Peer DLC Role and XID Type. This results in an incorrect sequence when activating a twinaxial connection, as shown below:

   SNA Server                Twinax Link Service
   ----------                -------------------
   Open Link Request   -->
                      <--    Open Link RSP OK
   Open Stat Request   -->
                      <--    Open Stat RSP OK
                      <--    DLCST STCD
                      <--    DLCST RQOS
   DLCST SXID          -->
                      <--    DLCST RQOS

				

In this sequence, the XID negotiation, shown as SXID and RQOS messages, is done after the Station Contacted (DLCST STCD) message.

The correct sequence when activating a Peer connection is shown below:

   SNA Server                Twinax Link Service
   ----------                -------------------
   Open Link Request   -->
                      <--    Open Link RSP OK
                      <--    DLCST RQOS
   DLCST SXID          -->
                      <--    DLCST RQOS
   DLCST SXID          -->
                      <--    DLCST RQOS
  Open Stat Request    -->
                      <--    Open Stat RSP OK
                      <--    DLCST STCD
				

In the correct sequence, the XID negotiation occurs before the Open Station (Open Stat) and Station Contacted messages.

SNA Server has been updated to correctly save the twinaxial connection with all of the Peer connection properties and to do the XID negotiation before it does the Open Station sequence.

In addition, the Twinaxial connection properties page will be updated to include a System Identification page. This page will include configuration options for the Local Node Name, Remote Node Name, XID Type, and Peer DLC Role.