OSPF_Terminology

OSPF Terminology OSPF Terminology Neighbor – A neighbor refers to a connected (adjacent) router that is running an OSPF process with the adjacent interface assigned to the same area. Neighbors are found by Hello packets. Adjacency - An adjacency refers to the logical connection between a router and its corresponding designated routers and backup designed routers. Link – In OSPF, a link refers to a network of a router interface assigned to any given network. Within OSPF, link is synonymous with interface. Interface – An interface is a physical interface on a router. When an interface is added to the OSPF process, it is considered by OSPF as a link. If an interface is up than a link is up. Link State Advisement – (LSA) is an OSPF data packet containing link state and routing information that is shared among OSPF routers. Designated router – (DR) is only used when the OSPF router is connected to a broadcast (multi-access) network. Backup Designated router – (BDR) is a hot standby for the DR on broadcast links. OSPF areas – OSPF areas are similar to EIGRP Autonomous Systems. Areas are used to establish a hierarchical network. It uses four types of areas. Area boarder router – (ABR) is a router that has router, interface, ospf, network, link, broadcast, areas, multi-access, area, state, routers, refers, networks, multiple, lsa, id, different, designated, acknowledgment, using, type, routing, relay, process, point-to-point, packet, nmba, ip, interfaces, frame, external, ethernet, dr, considered, connection