Open Shortest Path First - определение. Что такое Open Shortest Path First
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Что (кто) такое Open Shortest Path First - определение

INTERNET PROTOCOL
OSPF; OSPFv3; Area Border Router; OSPFv2; Ospf; Multicast Open Shortest Path First; MOSPF; Open shortest path first; Multiport open shortest path first; OSPF-TE; Backup Designated Router; Designated router; ASBR; Autonomous system boundary router; Internal router; OSPF hello; Database descriptor; Database description; LSAck; OSPF LSAck; OSPF DBD; OSPF LSR; Link state request; OSPF link state request; Link state update; OSPF link state update; OSPF link state acknowledgement; Link state acknowledgement; OSPF database descriptor; OSPF database description; Not-so-stubby area
  • Neighbor state changes (database exchange)
  • Neighbor state changes (Hello Protocol)
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  • Figure show 3 routers with 2 areas, area 0 and area 122, sharing one router.
  • Example of backbone, area 0 with 2 routers, R1 and R2
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OSPF         
Open Shortest Path First [Additional explanations: protocol / routing] (Reference: Internet, IGP, RFC 1583)
ASBR         
Autonomous System Border / Boundary Router (Reference: AS)

Википедия

Open Shortest Path First

Open Shortest Path First (OSPF) is a routing protocol for Internet Protocol (IP) networks. It uses a link state routing (LSR) algorithm and falls into the group of interior gateway protocols (IGPs), operating within a single autonomous system (AS).

OSPF gathers link state information from available routers and constructs a topology map of the network. The topology is presented as a routing table to the Internet Layer for routing packets by their destination IP address. OSPF supports Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 (IPv6) networks and supports the Classless Inter-Domain Routing (CIDR) addressing model.

OSPF is widely used in large enterprise networks. IS-IS, another LSR-based protocol, is more common in large service provider networks.

Originally designed in the 1980s, OSPF is defined for IPv4 in protocol version 2 by RFC 2328 (1998). The updates for IPv6 are specified as OSPF Version 3 in RFC 5340 (2008). OSPF supports the Classless Inter-Domain Routing (CIDR) addressing model.