Moving SERVER (DNS Timing For Less Downtime)

RH 7.3 w/Latest Kernel. RPM Install

I am ready to move the server to another co-lo center; and
hope this will the last time. Two times in the past 6
month.

I need to lower the expiring time, seconds in all domains's
DNS. I need a lower TTL and wanted to know based on
others that have done the move. I know that too low of a
TTL the root DNSes might ignore it. I also check and try to
stay as compliant as possible with DNSReport.

Location:
/var/named/run-root/var

I have very few domains, I can easily backup the entire directory
and one-by-one I can manually change the expiring time.

Here is a current sample of a domain:
Code: 
$TTL    86400

@       IN      SOA     ns1.theserver.com. totalrad.thedomain.com. (
                        1055712214      ; Serial
                        10800   ; Refresh
                        3600    ; Retry
                        604800  ; Expire
                        86400 ) ; Minimum

thedomain.com.              IN NS   ns1.theserver.com.
thedomain.com.              IN NS   ns2.theserver.com.
thedomain.com.              IN A    xx.xx.xxx.8
webmail.thedomain.com.              IN A    xx.xx.xxx.8
mail.thedomain.com.                 IN CNAME        thedomain.com.
ftp.thedomain.com.          IN CNAME        thedomain.com.
www.thedomain.com.          IN CNAME        thedomain.com.
thedomain.com.              IN MX  10 mail.thedomain.com.
Now the main Server settings, 'theserver.com' DNS Settings:
Code: 
$TTL    86400

@       IN      SOA     ns1.theserver.com. somename.theserver.com. (
                        XXXXXXXXXXXX      ; Serial
                        10800   ; Refresh
                        3600    ; Retry
                        604800  ; Expire
                        86400 ) ; Minimum

theserver.com.           IN NS   ns1.theserver.com.
theserver.com.           IN NS   ns2.theserver.com.
webmail.theserver.com.           IN A    xxx.xxx.xxx.8
theserver.com.           IN A    xxx.xxx.xxx.8
ns1.theserver.com.               IN A    xxx.xxx.xxx.8
ns2.theserver.com.               IN A    xxx.xxx.xxx.9
mail.theserver.com.              IN CNAME        theserver.com.
ftp.theserver.com.               IN CNAME        theserver.com.
www.theserver.com.               IN CNAME        theserver.com.
theserver.com.           IN MX  10 mail.theserver.com.
secure.theserver.com.            IN NS   ns1.theserver.com.
secure.theserver.com.            IN NS   ns2.theserver.com.
Anyone suggest a Refresh, Retry, Expire and Minimum time in order
for the server and the DNS to propagate faster and not have as
much down time.

I know once I change all domains, and DNS I will let it sit for
at least 2-3 days than do the switch.

I had a nightmare last time I did the reconfiguration. I ended
up finding/searching all HD for OLD IPs, change to new ones and
such and still got it to work. Hope this time it will be much
smoother. I am now more worried about propagation and DNS.

Thanks for any inputs, if I find anything on search engine, I'll post back here.

 

 

 

 

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