User might just execute one transaction/program but STAD might display many entries for that single transaction/program  each entryis a dialog step in SAP term. How many dialog-steps are displayed under a transaction/program is related to program/transaction design and how that transaction is executed.
Connections of the types TCP, ISO-on-TCP, UDP, ISO and S7 connection are configured in the SIMATIC Manager in NetPro. These connections are configured in the same way in STEP 7 (TIA Portal). In STEP 7 (TIA Portal) the S7 connections have to be configured in the Devices and Networks editor, in the Network view.
Other devices will see the VSS configured 6500 as a single device which means itâs possible to use multi chassis ether channel and protocols like spanning-tree will only see a single switch. This article provides configuration that will allow you to easily enable VSS on these switches. Here is a sample VSS configuration for 2x Cat6500 with Supervisor 720 provided by a Cisco champion. Commiting following command will save the configuration on both switches and reboot them.