DNS: can yuou have multiple IPs in use?

we are about o move location and it would be really handy if we could get several servers to have multiple dns records,
current site has totally differnt external ips to new site.

email, fine i just add mx records with differnt costing.

but not sure about (A) and www and PTR records


site a
web server = 111.111.111.11
ptr = web.mydomain.com  111.111.111.11

site b
webserver = 222.222.222.22
ptr = web.mydomain.com  222.222.222.22


same physical server but need it to work at either site  (test on a tuesday) move for real on the friday, as there is a lead time both running with faiilover is preffered.

isp can only offer round robin on www records,  

yet to have an answer on reverse lookups


what other ways could you get round this, surley large farms of web servers have one domain name and multiple IPS?


mhamerAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Irwin SantosComputer Integration SpecialistCommented:
the answer to your question is YES
0
Irwin SantosComputer Integration SpecialistCommented:
duplicate your reverse zone.. then duplicate your forward zone with the NEW IP....

update the server data files..and that's all you have to do.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Steve AgnewSr. Systems EngineerCommented:
Whenever a client gets multiple responses from DNS for a server it chooses one at RANDOM.  Do an NSLOOKUP for cnn.com and you'll see what IE uses to pick.  I don't think it actually uses a matrix to choose.. it might prefer one on it's network but if they are all 'remote gateway' away I think it's just RANDOM from what I have heard.
0
chawcheskewCommented:
Back to the first answer...  YES.  BUT, reverse dns doesn't work the same.  When a machine resolves an IP address, it will give the address RoundRobbin by default and alternate between the available IPs, but if the first ip fails, it reverts to the second.  So it will work, however it may be a little buggy.  Additionally Reverse DNS will not work that way.  DNS is a one to many database relation.  You cannot do Many to one.  If you setup multiple reverse records, the reverse looks will fail %50 of the time.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Networking

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.