Re: [cobalt-users] New IP Block - what the best way to add these

[Greg Hewitt-Long <cobaltusers@xxxxxxxxxxxxxxxxxxx>]

>C> Date: Thu, 21 Aug 2003 22:07:01 +1200
>C> From: Chae
>
>
>C> RAQ3 with ns & ns2 name servers on the same server ?(was
>C> already set-up like this when I got the machine)
>
>It may have been that way, but you really should fix it. :-)


If that could be fixed, it would make life a LOT easier.... a LOT easier.

If it can't, perhaps ns2.yourdomain.com could be handled by someone here on the list for a short period of time.  Sending over a copy of the /etc/named/records file, change ns2.yourdomain.com at the registry to the surrogate - and make changes on the single box - I'm assuming it's a single box - as the OP never mentioned that they had more than 1 machine....

>
>
>C> 1. Change IP address of one of the main DNS servers IP's to
>C>    the new IP
>C> 2. Ensure there is a virtual site created or changed so the IP
>C>    binds via the GUI
>C> 3. Then with one of the DNS servers using a new IP and a old
>C>    IP begin to make changes to customers DNS Records and site
>C>    configs
>
>Not quite.  Run DNS on _both_ old and new IP addresses, so you
>have functioning DNS no matter what.  Change the NS's IP address
>at the registrar ASAP.


On a single box, how does one get the DNS to run DIFFERENTLY for each nameserver address (ns & ns2).

>
>C> 4. When sites procreate and start using new IP's then change
>C>    the remaining Name servers IP to the new IP allocated.
>
>No.  First crank down your TTLs, and wait until the gTLD TTL
>interval has passed.

All the bigger ISPs ignore this... ALL of them.


> Run sites on both old and new IPs
>simultaneously if you wish to prevent downtime entirely; some
>places are rude enough to ignore TTLs, so you want things running
>on BOTH groups of IP addresses.


Can you explain how on a single RAQ you enable both IPs to work for a single virtual site?

>
>
>C> Someone correct me if I'm wrong please as I don't want any
>C> customers having downtime if possible.
>
>The trick is responding on old _and_ new IP addresses until
>cached copies of old info are gone.  Anything else will result in
>downtime -- short downtime if done right, but still downtime.


please enlighten on how to do this on a single box - it would be a VERY useful tip.

>
>Eddy
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