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ISP-DC_254856's avatar
ISP-DC_254856
Icon for Nimbostratus rankNimbostratus
Oct 22, 2016

Dual A record for same domain

Dear Team,   We have a domain name say . How can I implement 2 Address records ( of different subnets ) for the same domain () in BIG -IP DNS box such that when one IP is not accessible the we...
application delivery
BIG-IP
BIG-IP DNS
Vijay_E's avatar
Vijay_E
Icon for Cirrus rankCirrus
Oct 22, 2016

Within the WIP configuration, if you use "Global Availability" load balancing algorithm, you should be able to access the WIP from one resource and the other resource will come into play when the 1st one fails.

 

If you are looking for the setup, I am assuming 2 BIG-IP DNS devices in 2 different locationns and this is implemented using sub-domain delegation. Create a WIP - on a BIG-IP DNS device and let it synchronize with the 2 BIG-IP DNS devices.

 

Within a DNS service provider, create the following:

 

  • NS record for wip.xyz.com points to gtm-1.domain.com and gtm-2.domain.com

  • A-records for DNS boxes:

     

    gtm-1.domain.com 1.1.1.1

     

    gtm-2.domain.com 2.2.2.2

     

1.1.1.1 & 2.2.2.2 are the listeners configured on the BIG-IP DNS devices in 2 different locations.

 

3.CNAME " "