yes..i am changing IP address..But EV is using DNS names. If i change the names i may need to update that in EV. or only i am changing IP then its a DNS entry update

You can have you Centera's IP addresses changed if that what you mean.

As far EV is concerned this should have little impact although you will need to update your EV configuration for it.

However please check with Symantec as this is really a question for them

well if you have EV configured to use DNS names then you would only need to change DNS to reflect any IP address change on the centera cluster.  As far as the Centera is concerned this is all external to it and it doesn't care.

Speak to your networking people and Symantec to get their confirmation that there any no issues for them