Switching device with migrated connection table

Abstract

A method including providing: a switching device including a main mapping unit configured to provide a main mapping which maps virtual addresses to direct addresses; management logic configured to store a connection tracking table stored in memory and configured for storing a plurality of connection mappings each including a virtual-to-direct mapping from a virtual address to a direct address; and a migrated connection table stored in memory and configured for storing a plurality of migrated connection mappings each including a virtual-to-migrated-direct mapping from a virtual address to a migrated direct address. Upon receiving an indication that a direct address has changed: when the indication that a direct address has changed includes an indication that a direct address stored in one or more connection mappings in the connection tracking table is not active, copying the one or more connection mappings from the connection tracking table to the migrated connection table, when the indication that a direct address has changed includes an indication that a new direct address has become active, creating one or more connection mappings in the migrated connection table, and altering the main mapping in accordance with the direct address change.