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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).
Otherwise, it will take precedence over all routing protocols and routes issued from a routing protocol will not be inserted into the routing table. [3] The example below shows how to configure the administrative distance to 254 to specify that it should only be used as a last resort. R1(config)# ip route 10.0.0.0 255.0.0.0 backupLink 1 254
Source Demand Routing Protocol: RFC 1940: 0x2B 43 IPv6-Route Routing Header for IPv6: RFC 8200: 0x2C 44 IPv6-Frag Fragment Header for IPv6: RFC 8200: 0x2D 45 IDRP Inter-Domain Routing Protocol: 0x2E 46 RSVP Resource Reservation Protocol: RFC 2205: 0x2F 47 GRE Generic Routing Encapsulation: RFC 2784, RFC 2890: 0x30 48 DSR Dynamic Source Routing ...
The link-state advertisement (LSA) is a basic communication means of the OSPF routing protocol for the Internet Protocol (IP). It communicates the router's local routing topology to all other local routers in the same OSPF area.
Link-state routing protocols are one of the two main classes of routing protocols used in packet switching networks for computer communications, the others being distance-vector routing protocols. [1] Examples of link-state routing protocols include Open Shortest Path First (OSPF) and Intermediate System to Intermediate System (IS-IS). [2]
Routing protocols, according to the OSI routing framework, are layer management protocols for the network layer, regardless of their transport mechanism: IS-IS runs on the data link layer (Layer 2) Open Shortest Path First (OSPF) is encapsulated in IP, but runs only on the IPv4 subnet, while the IPv6 version runs on the link using only link ...
Zebra is a routing software package that provides TCP/IP based routing services with routing protocols support such as RIP, OSPF and BGP. Zebra also supports BGP Route Reflector and Route Server behavior. In addition to IPv4 routing protocols, Zebra also supports IPv6 routing protocols. Zebra provided a high quality, multi server routing engine.
IP forwarding algorithms in most routing software determine a route through a shortest path algorithm. In routers, packets arriving at an interface are examined for source and destination addressing and queued to the appropriate outgoing interface according to their destination address and a set of rules and performance metrics.