OES NW 6.5 SP4a (master replica)

Communication guys requesting me to change
ip on server from 10.1.x.x to a 10.10.x.x.

Subnet and router already changed, no issues.

This server host all ndpsm and broker services,
Sybase 9 services, remote manager and imanager, and all
file sharing.
Running as client is also Symantec AV
and Computer Assoc nwagent.nlm 11.1 build912.

How do I change the ip?
What is going to domino-effect on my
server when I was to change the ip?