Domain Name System (DNS)
The IETF has defined new Domain Name System (DNS) resource record types for IPv6 addresses. This section discusses AAAA and PTR records, which are used for IPv6 addresses in DNS servers.
AAAA Records
In IPv4, the A resource record maps a host name to an IPv4 address. Similarly, the AAAA resource record maps a host name to an IPv6 address. Table 3-9 shows two examples of different resource records using the same fully qualified domain name (FQDN).
| Protocol | Record | DNS Mapping |
|---|---|---|
| IPv4 | A | www.example.org A 206.123.31.200 |
| IPv6 | AAAA | www.example.org AAAA 2001:410:1:1:250:3EFF:FEE4:1 |
The AAAA record has been available since release 4.9.4 of the ISC Berkeley Internet Name Domain (BIND) software. ...
Get Cisco Self-Study: Implementing IPv6 Networks (IPV6) now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
