ISP Switch / DNS problem

[Barry Margolin]

In article <a9212e$9nb at pub3.rc.vix.com>,  <mrm00k at yahoo.com> wrote:
>Then I do the cutover. Change the IP address and DNS information on my
>nameserver. I update my info at internic to change the primary
>nameserver so it uses the new IP. I have the ISP pull their DNS info
>from the new IP.
>
>At this point I get confused. The primary nameserver and the secondary
>have my new DNS information. If name servers around the internet have
>cached the IP of my nameserver (from my old isp), won't their name
>resolution fail ?

That's why it's important to have offsite secondaries -- those addresses
won't be changing.  Queries to the cached IP will time out, and they'll
fail over to the ISP's servers.  In fact, since the ISP's servers probably
have faster connections to the Internet than you do, most queries will
probably be going to them in the first place, so no one will notice that
your server is no longer there.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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