[H-GEN] DNS Question for the DNS Gurus

[David Ash]

Rick Phillips wrote:
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> 
> I have a web/mailserver running with a number of virtual domains.  I am
> about to change my ISP after a number of years and will be "churning"
> the account.  This means that sometime on the nominated day, a Telstra
> technician makes a change in the exchange.  The new ISP can only
> guarantee that it will be done some time on the day nominated.
> 
> As I cannot afford to be off the air for too long and because
> re-delegation can take up to 24 hours, does anyone know if I can have my
> backup DNS server (on another machine and on another ISP) be changed to
> point to my new address while my own DNS server points to my current
> address.
> 
> The theory is that when the changeover happens, the new IP address will
> be available to the world immediately off the backup server.  My own DNS
> server can be changed after the event to match.  Would this work?

On my last move I didn't want to worry about that.  As well as DNS 
problems, and possibilities of adsl connectivity problems, I heard of a 
few instances of churning not working and being left without 
connectivity for a month.  So I paid for 2 months of internet for a one 
month period and cancelled the old account after I knew everything was 
working successfully.  I also got a cheaper plan at the same time.

Regards
Dash