What's SAP Router String for?

Question

Hi,
I can not find proper module for me to post this message, so I post it here.
When we create a new item in the SAP logon screen , we need to specify the following parameters:
1) System description
2) Message server
3) SAP Router String (optional)
4) System ID
5) System Number
4) Group
My question is, what's SAP router string for? How to define a new SAP router string?
Because sometimes we don't need to input SAP router string, and we can still logon to the system successfully.
So, If I need to create a new SAP router string, where to define?
Thanks.

Answer 1

Hi
A route string describes the stations of a connection required between two hosts. A route string has the syntax
(/H/host/S/service/W/pass)*
It consists of any number of substrings in the form /H/host/S/service/W/pass .
A route string contains a substring for each SAProuter and for the target server.
Each substring contains the information required by SAProuter to set up a connection in the route: the host name, the port name, and the password, if one was given.
Syntax for substrings:
·        /H / indicates the host name‑{}‑
Note that the host name must be at least two characters long.
·        /S/ is used for specifying the service (port); it is an optional entry, the default value is 3299
·        /W/ indicates the password for the connection between the predecessor and successor on the route and is also optional (default is u201Cu201D, no password)
In earlier Releases (<4.0A), the password entry was made one substring later and with the letter /P/.
New: /H/saprouter/W/pass/H/targetserver
Old: /H/saprouter/H/targetserver/P/pass
(Here pass is the password which is checked by the SAProuter on host saprouter to set up or prohibit the connection from the source host to the target host.)
Due to downward compatibility, the old password entry form is still possible.
Thenaks & Regards
Kishore