Configuring Area Range

An area range is a form of address summarization that defines a range of addresses to be used by the backbone ABRs when they communicate routes to other areas. Area range is a critical tool that pares the route tables and update traffic, as well as reduces network recalculation by the Dijkstra algorithm. Area range configuration summarizes by aggregating an areas‘ internal addresses to advertise a single network. Backbone routers see only one update, representing an entire range of subnets. Area ranges can be configured for purposes of advertisement as well as summarization of addresses that should not be advertised.

Use the area range command in OSPFv3 configuration command mode to configure an area address summarization.