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CAS Array mutiple sites. How to configure External DNS

the question i have is.

IF we have two sites that have different external IPSs, both sites are connect by a VPN, and there is an array of CAS. Users conect to mail.domain.com. How do i configure the External DNS so if 1 of the site is down beacuse of power outage mail.domain.com will go to the other site?

Do you use Round Robin in this CAS? OR you have to switch the DNS manually?

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shawnlevin
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shawnlevin
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1 Solution
 
AkhaterCommented:
you can either use any kind of Geographical balancing or you need to change the IP in the DNS manually that's way give it a low ttl from the start
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shawnlevinAuthor Commented:
so if i have mutiple clients using outlook anywhere connected to site A. I need to manually configure the external DNS so they will connect to Site B?

there is no like DNS failover product that will do it automatically so it will change the dns records to go to site b?
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AkhaterCommented:
there are some dns failover services out there but I never used any, part of the failover process i tell my clients to change the external DNS not a big deal
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shawnlevinAuthor Commented:
No one answered my question.
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