Switching IP''s for my DNS hosts

Re: Switching IP''s for my DNS hosts

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Chris, thanks a lot for the response, if you don't mind, I just want to
clarify a couple of things and ask some further advice.

First of all, here's is my setup
on machine A I'm running Web*3 ( with virtual hosting) and EIMS 2.1 via a
singel IP
on machine B I'm letterrip and my Primary DNS (QuicKDNS pro of course)

If I understand you correctly, could I set up machine A using OT and
assign it 2 ip's ( the new one and the old one) -Do I need to actually set
up a new web* server ( on the same machine) to listen to the second IP or I
can have it just listen for both, will EIMS listen for both as well??

I would then set Machine C with another copy QuickDNS, and letterip.
Then setup Quick DNS on machine B to point to the new IP's
Then setup Quick DNS on machine C to point to the old IP's.
(I'm thinking this way when I decommision Machine C it disables the old
IP's not the new ones)

Does this make sense?? Or am I still missing something in the configuration.
I'm going to try the switch over the next couple of days.

Thanks
John Readwin

>>I'm sure this is something others have gone through, so I am hoping to get
>>some advice.
>>
>>I need to switch the IP numbers associated with my hosts. ( I am getting a
>>new service for from my ISP and need to give up my existing 3 IP's for new
>>set of 8 ip's, I am hoping they allow me to keep them all until I complete
>>the transferfor my DNS hosts)
>
>[snip]
>
>>Any comments or suggestions would be much appreciated.
>
>You've come up with a bunch of good questions, but you seem a little fuzzy
>on some of the details. I've gone through this before.
>
>Step 1) Get both sets of addresses routed to your physical network.
>
>Step 2) Set up services on both sets of addresses. If you're using MacOS
>8.1 or later, or if you're using HomeDoor, you may (depending on your web
>server software) be able to set up web services on both sets of addresses
>on the same machine. However, email, DNS, and other services will still
>need to be duplicated on additional machines.
>
>At this point, you have all your normal services available on the new IPs,
>ready for the DNS switch, but you haven't actually made the switch.
>
>Step 3) Switch the DNS. You'll still be running DNS servers on both sets of
>addresses, but now the zone files will reflect the new addresses.
>
>Step 4) Tell Internic.
>
>Step 5) Wait. You should wait *at least* 2 days *after* Internic makes the
>changes. This is to allow time for the change to percolate throughout the
>net. Remember that Internic doesn't always make changes immediately -
>sometimes they can lose your request, and end up taking several weeks.
>Lately, they've been doing a lot of stuff, so their service has been spotty.
>
>Step 6) Dismantle the services on the old addresses.
>
>Step 7) Tell your ISP he can take back the old addresses.
>
>For step 2, you'll need at least one (and probably two) extra machine(s).
>If you don't have them, your ISP may be able to help you by lending you
>space on his machines, or he may be able to redirect ports - ask him what
>he suggests. If you end up using your own machines, but don't have the
>extra software, there is a sufficient amount of free server software that,
>while not as feature-complete nor possibly as stable, will probably get you
>through a few days of transition.
>
>Anyway, if you have any more questions about this, just ask. I hope the
>above makes things clearer for you.
>________________________________
>Chris Buxton
>Internet and Database Consultant

John Readwin
mailto:john@netextras.com
403-270-7295
http://www.netextras.com

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