Hi, This is not an issue but just to get ideas from experienced bind resources. Please ignore this question, if it is out of the scope of this mailing thread.
Significant number of DNS requests can be observed when dual-stack enabled and send both IPV4 and IPV6 DNS server addresses to clients through DHCP or similar. According to RCF 4472, "Note that even though IPv6 DNS resolver discovery is a recommended procedure, it is not required for dual-stack nodes in dual-stack networks as IPv6 DNS records can be queried over IPv4 as well as IPv6. Obviously, nodes that are meant to function without manual configuration in IPv6-only networks must implement the DNS resolver discovery function." client DNS request possibilities as follows per domain. (client browser/Application may send all or selected queries in parallel with short time difference) 1. A record requests to primary ipv4 dns server 2. A record request to secondary ipv4 dns 3. AAAA record requests to primary ipv4 dns server 4. AAAA record request to secondary ipv4 dns 5. A record requests to primary ipv6 dns server 6. A record request to secondary ipv6 dns 7. AAAA to primary ipv6 dns server 8. AAAA to secondary ipv6 dns server What will happen, if IPV6 DNS server addresses are removed from DHCP or similar assignment in dual-stack scenario and only keep IPV4 DNS servers. I guess this will reduce load to DNS servers as well as SP networks. Are there any practical limitations ?. Is it mandatory to send both IPV4 and IPV6 DNS server addresses in a dual-stack scenario. Regards DT
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