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Forum Discussion

Mary's avatar
Mary
Icon for Nimbostratus rankNimbostratus
Sep 28, 2020

Geolocation when LDNS in a different geography than user doing the lookup

I am wondering if anyone has clever thoughts on how to address the situation with Topology load-balancing on F5 DNS. If a user is in EMEA but their ISP DNS server is in the US, it will be that DNS se...
BIG-IP
BIG-IP DNS
devops
geolocation
Global Traffic Management
gtm
rob_carr's avatar
rob_carr
Icon for Cirrocumulus rankCirrocumulus
Sep 29, 2020

This is exactly why EDNS Client Subnet was created. Of course that depends on the ISP DNS server including the client subnet information and on your BIG-IP DNS running a version that supports the option.

 

Beyond that, not much to offer. This is a real and recognised weakness of global load balancing.

  • Mary's avatar
    Mary
    Icon for Nimbostratus rankNimbostratus
    Sep 30, 2020

    Thank you for making me aware of this.