SAP Note: 88346 - Changing the RFC destination if IP changes are made

Symptom

After you change the IP addresses of a host, the RFC destinations for which this host is defined as the target host no longer work.

Other Terms

RFC, destination, IP, DNS, host name, target host

Reason and Prerequisites

If you enter the host name (for example hs0311) as the target host when you maintain the RFC destination, the host name is stored internally in the database table RFCDES (for the destination administration) as its corresponding IP address. Among other things, this should reduce the time required to set up the RFC connection. As a result, the conversion of the target host name into its IP address is no longer required. Furthermore, the host name (as a Domain Name Server, among other things) can assume any length. This is not suitable for storage in the database table RFCDES.

This will create problems if the IP addresses of the target hosts are changed. After this action has been carried out, you must therefore amend the affected RFC destinations that use the IP addresses accordingly in transaction SM59.

Note:

• If you want to prevent the name of the target host from being stored as its respective IP address in the database table RFCDES, you must enter the host name as a SAP router name (/H/hs0311 instead of hs0311). In this case, the host name is stored as such in the database table RFCDES.