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Kent_Saunders's avatar
Kent_Saunders
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Jan 20, 2021

BigIP DNS failover

We have BigIP DNS servers in 2 AWS regions. The DNS zones are synchronized using iQuery and both DNS servers are registered with the domain. In the event of a failure in the primary region we would...
BIG-IP DNS
cloud
iRules
  • KeesvandenBos's avatar
    KeesvandenBos
    Jan 20, 2021

    Ok, you have to create two wide ip pools. One primairy with the virtual server of the primairy site, one with the DR site virtual server.

    Then in the wide ip select both pools with the primairy site at the top, for load balancing use Global availability.

    The DNS will return the primairy virtual server, the moment it becomes unavailable the DR virtual server will be returned on a query.

     

    Cheers,

     

    Kees

Kent_Saunders's avatar
Kent_Saunders
Icon for Nimbostratus rankNimbostratus
Jan 20, 2021

I started to configure as suggested and I don't think this will work. The DNS zones on both servers are sync'd. Correct me if I am wrong but using a Wide IP with the 2 pools will only ensure that the primary responds to DNS requests first. If the primary is not available, the secondary will respond. The problem is the secondary has the same records. We need need the website's A record to be changed to the DR site.

 

Thanks