Patent ID: 8717935
Filing Date: 2014-05-06
Classification: H04L

Abstract:
1. A method in a network element for open shortest path first (OSPF) non-stop routing with reliable flooding, the method comprising the steps of: responsive to a first OSPF instance of the network element that is currently acting as an active OSPF instance determining to flood a link-state advertisement (LSA), performing the following steps: if flooding of the LSA is complete, then the first OSPF instance causing the second OSPF instance to alter the status of the LSA to indicate that flooding is complete, wherein the flooding of the LSA is complete when the LSA is not indicated on any of the plurality of retransmission lists; and if the second OSPF instance has become the currently active OSPF instance prior to the flooding of the LSA completing, then the second OSPF instance attempting to reliably flood the LSA to all of the set of adjacent network elements of the flooding scope of the LSA.