Open Shortest-Path First Interior Gateway Protocol - definição. O que é Open Shortest-Path First Interior Gateway Protocol. Significado, conceito
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O que (quem) é Open Shortest-Path First Interior Gateway Protocol - definição

ROUTING PROTOCOL
IGRP; Interior gateway routing protocol

Open Shortest-Path First Interior Gateway Protocol      
<networking, protocol, standard> (OSPF) A {link state routing protocol} that is one of the Internet standard {Interior Gateway Protocols} defined in RFC 1247. There is no OSPF EGP, OSPF is an IGP only. [Relationship to Internet Protocol packet routing?] {OSPF Design Guide (http://cisco.com/warp/public/104/1.html)}. (2002-06-29)
Interior Gateway Protocol         
CLASS OF ROUTING PROTOCOLS
Interior routing protocol; Interior Gateway Protocol
(IGP) An Internet protocol which distributes routing information to the routers within an autonomous system. The term "gateway" is historical, "router" is currently the preferred term. See also Exterior Gateway Protocol, {Open Shortest Path First}, Routing Information Protocol. (1994-11-09)
Interior gateway protocol         
CLASS OF ROUTING PROTOCOLS
Interior routing protocol; Interior Gateway Protocol
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). This routing information can then be used to route network-layer protocols like IP.

Wikipédia

Interior Gateway Routing Protocol

Interior Gateway Routing Protocol (IGRP) is a distance vector interior gateway protocol (IGP) developed by Cisco. It is used by routers to exchange routing data within an autonomous system.

IGRP is a proprietary protocol. IGRP was created in part to overcome the limitations of RIP (maximum hop count of only 15, and a single routing metric) when used within large networks. IGRP supports multiple metrics for each route, including bandwidth, delay, load, and reliability; to compare two routes these metrics are combined into a single metric, using a formula which can be adjusted through the use of pre-set constants. By default, the IGRP composite metric is a sum of the segment delays and the lowest segment bandwidth. The maximum configurable hop count of IGRP-routed packets is 255 (default 100), and routing updates are broadcast every 90 seconds (by default). IGRP uses protocol number 9 for communication.

IGRP is considered a classful routing protocol. Because the protocol has no field for a subnet mask, the router assumes that all subnetwork addresses within the same Class A, Class B, or Class C network have the same subnet mask as the subnet mask configured for the interfaces in question. This contrasts with classless routing protocols that can use variable length subnet masks. Classful protocols have become less popular as they are wasteful of IP address space.