Method for advertising reachable address information in a network

A method for advertising reachable address information in a network comprising the steps of:

• providing a plurality of summary address items each specifying a summary address prefix;
• determining reachable addresses matching said summary address prefixes according to a priority;
• propagating reachable address information for reachable addresses matching a summary address prefix having a first priority;
• summarizing reachable address information for reachable addresses matching a summary address prefix having a second priority but not said summary address prefix having said first priority.

A method for advertising reachable address information in a network comprising the steps of:

• configuring a first node of a first peer group with a first summary address item, said first summary address item comprising an exception summary address item;
• advertising reachable address information for a first plurality of reachable addresses matching said exception summary address item to members of said first peer group;
• configuring said first node of said first peer group with a second summary address item, said second summary address item comprising a summarizing summary address item;
• summarizing reachable address information for a second plurality of reachable addresses matching said summarizing summary address item but not matching said exception summary address item;
• advertising said summarized reachable address information to members of said first peer group.