Patent ID: 6529481
Filing Date: 2003-03-04
Classification: H04L

Abstract:
A distributed Link-State Routing Protocol (LSRP) system in a packet switch having external communication ports, comprising:a first card for executing either an Update process or a Decision process of the LSRP; a second card for executing either a Decision process or an Update process of the LSRP; a third card for executing either a Decision process or an Update process of the LSRP; an (LS) controller operating external to the LSRP-related processes on the three cards, for configuring and monitoring the LSRP system; and a communication fabric coupling the cards with each other, with the LS controller, and with the external ports; wherein the LS controller configures one of the three cards to execute the LSRP Update process, another to execute the LSRP Decision process, and the third to act as a backup, and reassigns roles according to monitored condition of the three cards.