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Change Public Ip Of DNS Server

We currently have 2 external DNS servers with public IP address's. We will soon be changing service providers and therefore will have to change the ip address's of these servers. We also use these same servers as nameservers for approximately 30 websites which we host. It seems that i have had some kind of memory lapse or something as i can not remember how to make the outside world aware of the ip address change for the fqdn. Is it the same as any other site? Go to the registrar and add that ip for the name. Example: we have dns.mysite.com and dns2.mysite.com. These currently resolve to 72.73.74.75 &72.73.74.76 respectively. I want to change this to resolve to 82.83.84.85 & 82.83.84.86. How would this be accomplished. Thanks in advance for the help.

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Chris Dent

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Ihavenousername

ASKER

let me make sure i understand correctly. The registrar i understand. The NS records you speak of would like this...I have a web site named website.com which points to 1.1.1.2 i would have to change that to the new ip of 2.2.2.3 on my dns server is what you are referring to?

Chris Dent

Not quite.

The change at the registrar level only applies when you move the DNS services. The people responsible for registering your domain have a record of the name of each name server as well as it's IP address. The IP address is important to reduce the number of queries required to find a DNS server in many cases, and to make it possible in others. The IP data along with the regular name is referred to as Glue.

If you're only changing records within a zone, and not moving the DNS Servers themselves, you only have to concern yourself with changes on your own DNS Server. The impact there is limited to how long it takes everyone to see the change.

The rate of change is set by the value of the TTL, Time To Live, for each record. The value is normally in seconds and it represents how long someone else will remember the record for before they come back to your DNS servers and ask for it again. Up until that point they'll see the old, unchanged, version of the record.

Chris

Ihavenousername

ASKER

Thanks Chris I appreciate your help.