connectivity between ECC and BI ABAP

Hello everybody,

We have setup as

SAP ECC : 6.0

BI : SAP EHP 2 for SAP NetWeaver 7.0

we have installed ABAP and JAVA  instance on the separate machine with IP address 192.168.0.15 and 192.168.0.16, ECC has IP: 192.168.0.10.

Now we have plan to change the IP address for all the server.

so please suggest

1. what is the impact on changing the IP address of above said systems?

2. ABAP and JAVA has integration then how to take care of this after changing IP?

3. How to take care for ECC and BI ABAP connection after chaging the IP?

what is prerequisite for the above?

please suggest.

Thanks

Ganesh