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Originally designed in the 1980s, OSPF version 2 is defined in RFC 2328 (1998). [1] The updates for IPv6 are specified as OSPF version 3 in RFC 5340 (2008). [ 2 ] OSPF supports the Classless Inter-Domain Routing (CIDR) addressing model.
Appendix-A.4.1 of RFC 2328, all LSA packets start with a common LSA "20-byte header" as shown below. Note: These LSA Packet Headers are all preceded by OSPFv2 "24-byte" OSPF Headers. LS age (16 bits) The time in seconds since the LSA was created. LS type (8 bits) 1,2,3,4,5,6 or 7 Link State ID (32 bits)
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]
An interior gateway protocol (IGP) or interior routing protocol is a type of routing protocol used for exchanging routing table information between gateways (commonly routers) within an autonomous system (for example, a system of corporate local area networks). [1] This routing information can then be used to route network-layer protocols like IP.
Certain additional characteristics such as multilayer interfacing may also be employed as a means of distributing uncompromised networking gateways to authorized ports. [1] This has the added benefit of preventing issues with routing protocol loops. [2] Many routing protocols are defined in technical standards documents called RFCs. [3] [4] [5] [6]
The Open Shortest Path First (OSPF) All OSPF Routers address is used to send Hello packets to all OSPF routers on a network segment. No 224.0.0.6 The OSPF All Designated Routers (DR) address is used to send OSPF routing information to designated routers on a network segment. No 224.0.0.9
The Rams get 4 field goals to beat the 49ers 12-6 in a sloppy game. Sports. Yahoo Sports. 49ers coach Kyle Shanahan said LB De'Vondre Campbell 'didn't want to play,' and left. Weather.
An OSPF stubby area is one which receives routes from other areas in the OSPF domain but for external routes, which are communicated via a Type 5 Link-state advertisement, the stubby area is only aware of a default route; An OSPF totally stubby area is one which only has a default route to the rest of the OSPF routing domain. Such an area may ...