Fault tolerant IS-IS routing system and method corresponding

摘要

A router (1) control procedure has active (2) and standby (3) protocol engines with connection data stored in respective memories updated in the standby memory (31, 32, 33) when changes in the active (21, 22, 23) memory are detected and checked in the standby on switching (4) over. Includes an Independent claim for a router using the procedure.