IP Forwarding?

I moved a large site and thus the IP changed. Windows or ISP's seems to cache these IP's and I was wondering if there is something I can do to forward the old IP to the new one.

123.123.123.123 >>to>> 321.321.321.321

Basically I transferred a site from a master cpanel server to a slave cpanel server using the automated processes. So the DNS is the same just the IP has changed.

I'm on a linux RH (old)7.x & (new)8.0 server both running WHM/Cpanel.

Or would this be something my data center needs to do with there router?

Thanks.

 

 

 

 

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