This feature is deprecated
Dedicated secondary DNS is deprecated because the resiliency and reliability of Netlify DNS have surpassed the benefits provided by secondary DNS. As such, this feature is no longer available to new customers.
Netlify’s dedicated DNS network is separately provisioned from our main DNS network, providing a DNS redundancy option. For teams using our dedicated DNS network, all DNS traffic for managed domains is distributed across both DNS networks. In the event of a volumetric attack such as a Distributed Denial of Service (DDoS), the secondary network provides a physically and logically separate failover for domain name resolution.
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