1. Configuration Guide
  2. System Configuration
  3. DNS on the OCSBC
  4. DNS Support for IPv6

DNS Support for IPv6

The Oracle Communications Session Border Controller supports the DNS resolution of IPv6 addresses; in other words, it can request the AAAA record type (per RFC 1886) in DNS requests. In addition, the Oracle Communications Session Border Controller can make DNS requests over IPv6 transport so that it can operate in networks that host IPv6 DNS servers.

For mixed IPv4-IPv6 networks, the Oracle Communications Session Border Controller follows these rules:

  • If the realm associated with the name resolution is an IPv6 realm, the Oracle Communications Session Border Controller will send the query out using the AAAA record type.
  • If the realm associated with the name resolution is an IPv4 realm, the Oracle Communications Session Border Controller will send the query out using the A record type.

In addition, heterogeneous address family configuration is prevented for the dns-ip-primary, dns-ip-backup1, and dns-ip-backup2 parameters.