Interface and Realm Support of DNS Servers
You can configure DNS functionality on a per-network-interface, or per-realm basis. Configuring DNS servers for your realms means that you can have multiple DNS servers in connected networks. In addition, this allows you to specify which DNS server to use for a given realm because the DNS might actually be in a different realm with a different network interface.
This feature is available for SIP only.
To configure realm-specific DNS in the ACLI: