Consolidating multiple pieces of route information into one, simplifying the routing table.
A technique that combines multiple contiguous network prefixes (e.g., 192.168.0.0/24 and 192.168.1.0/24) into a single, smaller entry (192.168.0.0/23). Beyond shrinking the routing table, it also localizes the impact of a failure within part of the summarized range, limiting how far the recalculation has to propagate.
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