![]() The routers then flood these received LSAs out every OSPF-enabled interface so that all OSPFv2 routers eventually have identical link-state databases. Adjacent routers shar e link-state advertisements (LSAs) that include information about the operational state of each link, the cost of the link, and any other neighbor information. The neighbor routers try to establish adjacency, which means that the routers synchronize their link-state databases to ensure that they have identical OSPFv2 routing information. ![]() ![]() Once a neighbor is discovered, the two routers compare information in the Hello packet to determine if the routers have compatible configurations. An OSPFv2 router sends a special message, called a hello packet, out each OSPF-enabled interface to discover other OSPFv2 neighbor routers. OSPFv2 is an IETF link-state protocol (see the “Link-State Protocols” section) for IPv4 networks. This chapter includes the following sections: This chapter describes how to configure Open Shortest Path First version 2 (OSPFv2) for IPv4 networks on the Cisco NX-OS device. Limiting the Number of Redistributed Routes.Configuring Filter Lists for Border Routers.Configuring Authentication for an Interface. ![]() Configuring Optional Parameters on an OSPFv2 Instance. ![]()
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