292 CHAPTER 28: OSPF C ONFIGURATIONAfter the restart, the GR Restarter will send an OSPF GR signal to its neighbors thatwill not reset their adjacencies with it. In this way, the GR Restarter can restore theneighbor table upon receiving the responses from neighbors.After reestablishing neighbor relationships, the GR Restarter will synchronize theLSDB and exchange routing information with all adjacent GR-capable neighbors.After that, the GR Restarter will update its own routing table and forwarding tablebased on the new routing information and remove the stale routes. In this way,the OSPF routing convergence is complete.Protocols and Standards ■ RFC 1765:OSPF Database Overflow■ RFC 2328: OSPF Version 2■ RFC 3101: OSPF Not-So-Stubby Area (NSSA) Option■ RFC 3137: OSPF Stub Router AdvertisementOSPF ConfigurationTask ListComplete the following tasks to configure OSPF:Task Remarks“Configuring OSPF Basic Functions” on page 293 Required“Configuring OSPF Area Parameters” on page 294 Optional“Configuring OSPF Network Types” on page 295 “Configuring the OSPFNetwork Type for anInterface” on page 296Optional“Configuring an NBMANeighbor” on page 296Optional“Configuring a Router Priorityfor an OSPF Interface” onpage 296Optional“Configuring OSPF Route Control” on page 297 “Configuring OSPF RouteSummarization” on page 297Optional“Configuring OSPF InboundRoute Filtering” on page 298Optional“Configuring ABR Type-3 LSAFiltering” on page 298Optional“Configuring an OSPF Cost foran Interface” on page 298Optional“Configuring the MaximumNumber of OSPF Routes” onpage 299Optional“Configuring the MaximumNumber of Load-balancedRoutes” on page 299Optional“Configuring a Priority forOSPF” on page 299Optional“Configuring OSPF RouteRedistribution” on page 300Optional
