Anycast

Creator
Creator
Seonglae Cho
Created
Created
2022 Feb 22 5:59
Editor
Edited
Edited
2025 Jan 10 21:26
Refs
Refs

Definition

Anycast is a method that sends traffic to the nameserver closest to the client through network routing.

Method

Data transmission to only one node among the receivable closest nodes connected to the network

Results

When using Anycast, the burden of nameserver selection shifts from the Resolver to the routing system (
BGP
), which can provide better performance.
 
 
The optimal approach for a domain when considering both performance and operational resilience is for the domain to be served by two distinct dual-stack diverse anycast nameservers.
While it may seem that increasing the number of nameservers would improve stability, in reality there are no significant benefits to having more than 6 servers.
For domains with
DNSSEC
enabled, nameserver configuration and key management become more complex. This requires additional considerations.
 
 

 

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