Entering Route Strings
A route string describes a connection required between two hosts using one or more SAProuters. Each of these SAProuters then checks its Route Permission Table to see whether the connection between its predecessor and successor is allowed, and if it is, sets it up.
Procedure
The entry of route strings is best illustrated by an example.
The following graphic shows an example of a connection between SAP and a customer system. In this example, an SAP service employee working on sappc
wants to log on to a customer application server yourapp
that provides or uses the service sapsrv
.
The SAP service employee logs on to the SAP system, and sets up a connection between sappc
and yourapp
using the SAProuter on sap_rout
and the customer's SAProuter your_rout
.
your_rout
requires password pass_to_app
for connections with yourapp
.
The route string appears as follows:
/H/sap_rout/H/your_rout/W/pass_to_app/H/yourapp/S/sapsrv
This route string is interpreted by the SAProuters involved in the route as follows:
Host/address |
Service/port |
Password |
|
|---|---|---|---|
Substring 1 |
/H/sap_rout |
/S/<default> |
<no password> |
Substring 2 |
/H/your_rout |
/S/<default> |
/W/pass_to_app |
Substring 3 |
/H/yourapp |
/S/sapsrv |
The connection from sappc
to the application server is set up in the following steps:
sappc (front end) |
Sets up the connection to SAProuter |
sap_rout (SAProuter on SAP side) |
Uses the route permission table to check whether route |
your_rout (SAProuter on customer side) |
Checks whether route |
A SAProuter always checks only the previous host name or the previous IP address and the next substring (/H/.../S/.../W/..) for host name or IP address, service and password. The last substring does not contain a password, since there is no successor in the route.
If the /S/ section is missing, the default port number of the SAProuter is used. If the /W/ section is missing, a password is not used.
With the old password entry, the above route string would appear as follows:
/H/sap_rout/H/your_rout/H/yourapp/S/sapsrv/P/pass_to_app
Note that the host name (which follows the /H/ in the route string) must be at least two characters long.