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Kriangkrai_Hong's avatar
Kriangkrai_Hong
Icon for Nimbostratus rankNimbostratus
Sep 05, 2019

How root hint works if it have multiple IP addresses

I have created DNS cache using Resolver type. In Root Hints, I have put 6 IP addresses in the list. Not sure how it works. Is it work in sequence from the first in the list?

application delivery
BIG-IP DNS
dns
gtm
operations
  • skipjack's avatar
    skipjack
    Icon for Employee rankEmployee
    Sep 30, 2019

    Per K34350074, BIG-IP sends a "priming" request to each address in the list by randomly selecting an IP address from Root Hints. IF there are 6 addresses in the list, BIG-IP queries each address and then updates the cache with current root server information.