Reprinted: https://www.cnblogs.com/ruingy/archive/2014/06/03/3765142.html
A total of two steps, first set up the server, the second is the client login settings.
First use SMLG in SAP for server grouping. SAP instance name is defined in the system before, you can not delete did not change. (I probably will not, will teach). Let's build a Group, and then to Group named X, the instance is added to the group. Configure the server as simple as that.
The following settings SAP message server at the client, to prepare for the next step.
Into the user's windows installation directory, use the system variable% windir% can determine the specific location, locate and change the file sapmsg.ini file, change the finished document reads as follows:
[the Message Server]
PRD = 192.168.0.26
The PRD is taken lightly, see your own meaning, IP points to your SAP message server.
Now set the landing group, start SAP logon, (SAPGUI6.4 and 7.1 a bit different, now 7.1, for example) when you click New Project, click Next, go to select the connection type, select the drop-down list in the "Group / Server Selection" connection parameter entered in the system described in paragraph custom. PRD select or input the identification system (not lose it is selected from, for unknown reasons), this time, in the message server should resolve an address. Choose your group with SMLG created out of the server name in the group / server. Click Finish, all configuration is complete.
Now go back to SAP logon, double-click the server list just completed the SAP start it, the system will now decide which machine to sign a set of servers based on server response time.
Taking into account user-friendly, easy configuration, etc., you can be on the company's windows domain you built these things distributed to the user, the file is actually distributed windows almost all SAP files that begin with the installation directory:
sapmsg.ini , saplogon.ini, saproute.ini
Note:
In theory (own imagination), SAPGUI always connected to the SAP message server, message server is determined that the current response time of each server, which sets the shortest response time, letting the GUI even where Taiwan. If you find your server with configuration are similar, but a lot of GUI are connected on a single server, it means another response time problems to be adjusted a bit. You can log in at any time to view the situation of each server through AL08, you can also view the response time of each server by pressing F5 SMLG.
Possible problems encountered
1, when the user to configure the client login, the system identifies the input PRD, but can not resolve the IP.
Resolution: The message server is not configured, change sapmsg.ini file.
2, enter the PRD system identification, you can not select group of servers, an error message appears, or garbled
reasons not find, estimated to be in the service of certain communication port settings file in question, resulting in not communicate with the message server, of course, no the method selected group of servers.
Solution: find from other normal machine to install windows system32 \ drivers \ service file in the etc directory, like covering up a copy.