The IP's you are going to reconfigure are in use for cluster or Public IPs.
If its in use for cluster resources.. you need to bring down the parent resources depending on these IP resources and IP resources. when you all set up with New IP's configure them using
haconf -makerw
hagrp -freeze SGname
hares -modify IPresname Address newIp
hares -modify Ipresname netmask newnetmask
hares -online Ipresname -sys (sys on which Sg is partial)
hares -online parentresource(which you brought it down bfore)
hastatus -summ (to verify SG is online)
hagrp -unfreeze SGname
haconf -dump -makero
if these are Public Ips , you seek to take a downtime of server.
Regards,
Munish
