On Wed, Mar 6, 2013 at 4:40 PM, Tim Evans tkevans@tkevans.com wrote:
We are replacing four servers, running mail, web, ftp, and dns, respectively, with a single server to run all four services.
The new server will have a new IP address.
It seems fairly straightforward to redirect mail, web, and ftp services to the new server via DNS CNAMES, but I'm not quite sure about how to do the change for the DNS service itself.
Is there a need to maintain the old DNS server's IP address during a transition, or longer? Via a virtual IP with the old DNS server's IP address on the new machine, perhaps? Or a second NIC with the old address? Or just have the router redirect incoming DNS requests?
Thanks.
Tim Evans | 5 Chestnut Court Linux/UNIX Consulting | Owings Mills, MD 21117 http://www.tkevans.com/ | 443-394-3864 tkevans@tkevans.com _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Hi Tim,
To migrate the DNS server, ideally the steps as follows,
- Provision the new server and setup as the secondary DNS server - Sync the zones - Reduce the TTL of the nameservers - Change the new server to primary - Change the glue DNS records (from domain registrar panel - if applicable) - Let the old server running for few days and monitor for any traffic
Regards, Vipul