Configuring SNA 9-25Connections ParametersSqis simply a sequence number to allow selection of a line in the display.HSAPis the service access point (SAP) address used to connect to the host. This must matchthe SSAP (source SAP) in a frame received from the local LAN or the DSAP (desti-nation SAP) in a frame from the remote link station.Local Subscriber IDis the subscriber address assigned to the local end of the SNA connection. If config-uring an LLC2-to-SDLC link, this address must match the Remote Subscriber ID con-figured in the SNA port record for the SDLC device. If configuring an LLC2-to-LLC2connection, this address must match the Remote Subscriber ID in the remote node'sLLC2 Host record.Remote Subscriber IDis the subscriber address assigned to the remote end of the SNA connection. If config-uring an LLC2-to-SDLC link, this address must match the Local Subscriber ID con-figured in the SNA port record for the SDLC device. If configuring an LLC2-to-LLC2connection, this address must match the Local Subscriber ID in the remote node's LLC2Host record.IDBLKis used in conjunction with IDNUM in generating the Node field in an XID frame(format 0 or 3) to establish a link station connection to the host. A further explanationis provided under "IDNUM."IDNUMis used in conjuction with IDBLK in generating the Node field in an XID frame (format0 or 3) to estblish a link station connection to the host. If both IDBLK and IDNUMare set to 0, the Node field of the XID will be provided by the attached SDLC device.(The node will send an XID command to the remote node to indicate that the SDLCdevice should be polled for an XID.)Maxdatamust correspond to the PIU size configured on the host (parameter MAXDATA of macroPU in VTAM). For a link between a PU type 4 and a PU type 2, the frame size con-figured for the HPAD and TPAD SNA ports must be set at the value of MAXDATAin VTAM plus 6 bytes (corresponding to the length of the link header and the linktrailer).MaxInis the maximum number of sequentially numbered Information LPDUs that the linkstation can have outstanding.
