Listener on BigIP DNS

[newbie]

Did anybody happen to know how a DNS query gets directed to the BigIP DNS Listener?

Thanks.

[Lidev]

Hi Alex,

Here's an overview of DNS query processing on BIG-IP systems : https://support.f5.com/csp/article/K14510

Regards

[newbie]

Thanks for the response. Unfortunately, I didn't find the info I am looking for in this article. I am trying to figure out how a DNS query that a user sends ends up on a BigIP DNS.

So, we have 2 BigIP DNSes and we're using Wide IPs for looking up a query once it gets there. But what's the path for that query getting to one of the BigIP DNS?

Thanks.

[Lidev]

Client Local DNS (LDNS) -> DNS Root -> DNS TLD (.com) -> BIG-IP DNS servers (yourdomain.com)

Then, selection between the two BIG-IP DNS depend on the loadbalancing algorithm defined at GSLB level.

More details here :

• https://devcentral.f5.com/s/articles/lets-talk-dns-on-devcentral#.UxdcebHnbIV
• https://f5.com/fr/education/training/free-courses/getting-started-with-big-ip-global-traffic-manager-gtm