METHOD AND APPARATUS FOR FACILITATING PROCESS RESTART IN A MULTI-INSTANCE IS-IS SYSTEM

摘要

A method and apparatus for facilitating process restart in an IS-IS router that includes an active router processor (RP) module for supporting an active IS-IS process instance as well as one or more dormant instances of the active IS-IS process. Routing database information maintained by the active IS-IS process is synchronized to one or more corresponding databases associated with the dormant instances. Responsive to a control signal, one of the dormant instances may be activated as the new active IS-IS process instance on the active RP module, wherein the contents of the database corresponding to the newly activated instance are used for continuing to maintain routing functionality.