Method for automatically configuring a router, method for automatic address configuration, router, computer program and computer-readable medium

A router comprising:

• a processor;
• and
• memory;
• at least one upstream interface;
• and
• at least one downstream interface;
• wherein the router is configured to:
• monitor whether messages that are used to announce at least one domain are received on the at least one upstream interface;
• and
• activate automatically a domain name system (DNS) island mode in which a DNS zone of a local DNS server of the router is configured utilizing a predefined island domain if no such message was received over a prescribed period, and
• prompt a transmitting module of the router to use at least one downstream interface to send at least one message comprising the preconfigured island domain if no such message was received over the prescribed period.

A non-transitory computer-readable medium encoded with program instructions which, when executed by a processor on at least one computer, prompt the at least one computer to automatically configure a router in a network, the router including at least one upstream interface connected or connectable to at least one of (i) a higher-level subnetwork and (ii) a higher-level router, and including at least one downstream interface connected or connectable to a lower-level subnetwork, the program instructions comprising:

• program code for monitoring the router to whether the router receives messages on the at least one upstream interface which are utilized to announce at least one domain;
• program code for activating automatically a domain name system (DNS) island mode in which a DNS zone of a local DNS server of the router is configured utilizing a predefined island domain if such a message is unreceived over a prescribed period;
• and
• program code for prompting a transmitting module of the router to send at least one message comprising the preconfigured island domain via at least one downstream interface.