Impact on Portal if changing IP address of backend systems ?

Hi,
Slightly different scenario to the usual "change of ip" address questions.
We have an EP6 Portal used for SSO access to backend R/3, CRM, BW systems.
Does anyone know the impact on the Portal side if the IP address is changed for the backend systems only ?
The Portal system IP address will not change.
The changes requires on the backend systems is already known about,
as they are addressed in notes: 88346, 403708, 757692.
From browsing the forums, I am expecting the Portal will need a restart because
the JVM caches IP addresses.
Refer: Controlling DNS caching in the Java Virtual Machine (i.e. J2EE WAS)
Is there likely to be an impact on SSO, or anything else on the Portal side ?
Many thanks,
Andres

Hi Andres,
No problem with the SSO and other details.
But you have to change the hosts file and map the servername with the new IP address.
The path for the host file in windows environment is /drivers/etc/hosts.
Here you have to map the new IP with the corresponding server name.
Other than this everything will work properly.
If you are unable to change the hosts file then in the system object of the portal in the connector property set the server name to the new IP address. Everything will work properly. We had this problem and solved this.
Regards
Arun

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