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Topic: Interior Gateway Routing Protocol

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Enhanced Interior Gateway Routing Protocol

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	Enhanced Interior Gateway Routing Protocol - Wikipedia, the free encyclopedia
		EIGRP is a balanced hybrid IP routing protocol, with optimizations to minimize both the routing instability incurred after topology changes, as well as the use of bandwidth and processing power in the router.
		Routing table: Stores the actual routes to all destinations; routes may be marked either as "Passive", which is the normal state when the routing has stabilized, or "Active" when the topology has changed, and the router is in the process of updating its route to that destination.
		These routes are used in case a successor route dies.
	en.wikipedia.org /wiki/EIGRP (571 words)

	Interior Gateway Routing Protocol - Wikipedia, the free encyclopedia
		Interior Gateway Routing Protocol (IGRP) is a kind of IGP which is a proprietary distance-vector routing protocol invented by Cisco, used by routers to exchange routing data within an autonomous system.
		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, load, delay, mtu, and reliability; to compare two routes these metrics are combined together into a single metric, using a formula which can be adjusted through the use of pre-set constants.
	en.wikipedia.org /wiki/IGRP (221 words)

	Routing - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-02)
		Routing is also a manufacturing process that employs a wood router to bore holes or grooves.
		Routing provides the means of forwarding logically addressed packets from their local subnetwork toward their ultimate destination.
		Routing occurs at layer 3 of the OSI seven-layer model.
	www.encyclopedia-online.info /Routing (534 words)

	Interior gateway routing protocol
		Interior gateway routing protocol (IGRP) is a proprietary distance-vector routing protocol invented by Cisco, used by routers to exchange routing data within an autonomous system.
		IGRP was created to overcome the limitations of RIP when used within large networks.
		EIGRP it's successor, is a hybrid routing protocol, combining link-state and distance-vector.
	www.ebroadcast.com.au /lookup/encyclopedia/ig/IGRP.html (68 words)

	Cisco IGRP: Interior Gateway Routing Protocol
		IGRP is a distance vector Interior Gateway Protocol (IGP).
		Distance vector routing protocols are often contrasted with link-state routing protocols, which send local connection information to all nodes in the internetwork.
		Only routes with metrics that are within a certain range or variance of the best route are used as multiple paths.
	www.javvin.com /protocolIGRP.html (375 words)

	Interior Gateway Routing Protocol (IGRP)
		As routing information proliferates through the network, routers can identify new destinations as they are added to the network, learn of failures in the network, and, most importantly, calculate distances to all known destinations.
		IGRP uses a composite metric that is calculated by factoring weighted mathematical values for internetwork delay, bandwidth, reliability, and load.
		IGRP has proven to be one of the most successful routing protocols of all time.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/igrp.htm (1714 words)

	Interior Gateway Routing Protocol - Biocrawler (Site not responding. Last check: 2007-11-02)
		IGRP was created in part to overcome the limitations of RIP (maximum hop count, and a single routing metric) when used within large networks.
		IGRP supports multiple metrics for each route, including bandwidth, load, delay, and reliability; to compare two routes these metrics are combined together into a single metric, using a formula which can be adjusted through the use of pre-set constants.
		Its successor is EIGRP, an advanced distance-vector routing protocol, that uses many features of link-state protocols, and adds Diffusing Update Algorithm (DUAL) ideas to the basic distance-vector mechanism of IGRP.
	www.biocrawler.com /encyclopedia/IGRP (225 words)

	Interior Gateway Routing Protocol (IGRP)
		Interior Gateway Routing Protocol, Cisco’s propriety distance-vector routing protocol was created to resolve some of the issues with RIP.
		The hop count of IGRP is set as default to 100, but can be raised up to 255 eliminating the problem RIP had with routes greater than 15 hops.
		IGRP also does away with the hop count metric and uses bandwidth and delay by default, a much better method for determining a path’s cost.
	www.internetworktraining.com /kbase/routing_protocols/igrp.html (206 words)

	Enhanced Interior Gateway Routing Protocol (EIGRP)
		The metric that the router uses in the routing table, and to advertise to other routers, is the sum of the best-advertised metric from all neighbors and the link cost to the best neighbor.
		External routes are learned by another routing protocol or reside in the routing table as static routes.
		Route tagging is particularly useful in transit ASs, where Enhanced IGRP typically interacts with an interdomain routing protocol that implements more global policies, resulting in a very scalable, policy-based routing.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/en_igrp.htm (2081 words)

	IGRP (Interior Gateway Routing Protocol) (Linktionary term)
		IGRP is a Cisco interior routing protocol based on distance-vector routing.
		An interior routing protocol is meant to be used inside an autonomous system (an organization's private network) while an exterior routing protocol operated between autonomous systems.
		When routers add entries to routing tables, 1 is added to the hop count to account for the hop between the router and the neighbor from which it received the route information.
	www.linktionary.com /i/igrp.html (846 words)

	Learn more about Communications protocol in the online encyclopedia. (Site not responding. Last check: 2007-11-02)
		In networking, a communications protocol or network protocol is the specification of a set of rules for a particular type of communication.
		Most recent protocols are assigned by the IETF for internet communications, and the IEEE, or the ISO organizations for other types.
		Index page for network protocols and protocol layers, categorised by the nearest matching layers of the OSI seven layer model.
	www.onlineencyclopedia.org /c/co/communications_protocol.html (254 words)

	IP Routing: Chapter 4: Enhanced Interior Gateway Routing Protocol (EIGRP)
		When a route is lost, the updates stop; the invalid and flush timers grow and grow (the timers are not reset), and, ultimately, the route is flushed from the routing table.
		This is similar to RIP and IGRP and is a prudent way for a routing protocol to reduce the number of routes that are propagated between routers.
		A route is regarded as stuck-in-active (SIA) when DUAL does not receive a response to a query from a neighbor for three minutes, which is the default value of the active timer.
	www.oreilly.com /catalog/iprouting/chapter/ch04.html (6394 words)

	NCeXchange
		Routing provides the means of discovering paths along which information (usually, but not always, packets) can be sent.
		Such networks can use their routing to find the best route to deliver data to a destination; choices are made depending upon goals such as finding the shortest distances and the fastest links available through a choice of network connections.
		Routed protocols define the format and use of the fields within a packet.
	www.ncexchange.org /76__Routing_Explained.html (800 words)

	Cisco EIGRP (Site not responding. Last check: 2007-11-02)
		It is regarded as an interior gateway protocol (IGP) but has also been used extensively as an exterior gateway protocol for inter-domain routing.
		A router only sends routing updates as distance vectors of directly connected routes, rather than every route that is in the network.
		The Topology Table is populated by the protocol dependent modules and acted upon by the DUAL finite state machine.
	networking.ringofsaturn.com /Cisco/eigrp.php (1123 words)

	Cisco Sem3 Lesson 5 - IGRP
		routing table entry (manually defined by the system administrator) that is used to direct frames for which a next hop is not explicitly listed in the routing table.
		Link state algorithms create a consistent view of the network and are therefore not prone to routing loops, but they achieve this at the cost of relatively greater computational difficulty and more widespread traffic (compared with distance vector routing algorithms).
		IGRP is a distance vector routing protocol developed by Cisco.
	www.tele.sunyit.edu /HALF_REVIEW/5IGRP.htm (1341 words)

	Interior Training - Learn interiors study Interioring training classes Interior courses (Site not responding. Last check: 2007-11-02)
		This course examines Open Shortest Path First (OSPF) which is one of the most commonly used interior gateway protocols in IP networking.
		This module addresses the routing process types of routing classification specific IP routing protocols variable length subnet masks and route summarization (aggregation).
		The categories of dynamic routing protocols which include both link state and distance vector are reviewed in Lesson 2.
	www.training-classes.com /course_hierarchy/keyword_index/interior.html (1439 words)

	IGRP - Interior Gateway Routing Protocol
		IGP developed by Cisco to address the issues associated with routing in large, heterogeneous networks.
		Protocol developed by Cisco to address the issues associated with routing in large, heterogeneous networks.
		Protocol developed to address problems associated with routing in large, heterogeneous networks.
	www.auditmypc.com /acronym/IGRP.asp (139 words)

	What is EIGRP? - a definition from Whatis.com - see also: IGRP, Interior Gateway Routing Protocol, Enhanced Interior ...
		EIGRP evolved from IGRP (Interior Gateway Routing Protocol) and routers using either EIGRP and IGRP can interoperate because the metric (criteria used for selecting a route) used with one protocol can be translated into the metrics of the other protocol.
		If it can't find a route to a destination in one of these tables, it queries its neighbors for a route and they in turn query their neighbors until a route is found.
		When a routing table entry changes in one of the routers, it notifies its neighbors of the change only (some earlier protocols require sending the entire table).
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci214442,00.html (337 words)

	[No title]
		Along with IS-IS, it is one of the few multi-protocol routing protocols.
		always keeps a backup route in mind, in case the primary route goes down.
		From the topology database the best route (Successor) and the second best route (Feasible Successor) is found.
	www.firewall.cx /eigrp.php (175 words)

	The TCP/IP Guide - Enhanced Interior Gateway Routing Protocol (EIGRP)
		IGRP represented a substantial improvement over RIP, but like any successful company, Cisco was not content to rest on its laurels.
		Cisco knew that IGRP had significant room for improvement, so they set to work on creating a better version of IGMP in the early 1990s.
		EIGRP changes the way that routes are calculated, in an effort to improve efficiency and the speed of route convergence (agreement on routes between different routers in the internetwork).
	tcpipguide.com /free/t_EnhancedInteriorGatewayRoutingProtocolEIGRP.htm (531 words)

	Interior Gateway Routing Protocol and Enhanced IGRP
		Distance vector routing protocols call for each router to send all or a portion of its routing table in a routing update message at regular intervals to each of its neighboring routers.
		Router 1 (R1) initially advertises that it has a route to Network A. There is no reason for Router 2 (R2) to include this route in its update back to R1, as R1 is closer to Network A. The split-horizon rule says that R2 should strike this route from any updates it sends to R1.
		Because the metrics for both protocols are directly translatable, they are as easily comparable as if they were routes that originated in their own ASs.
	www.ba-stuttgart.de /~schulte/htme/55182.htm (2659 words)

	Interior Gateway Protocol Lab
		You will be configuring routers R1 through R5, while router R6 is preconfigured for EIGRP protocol on serial port S1 and will supply a default route for the lab network.
		Cisco routers have a debug mode that can be helpful in debugging routing protocols, especially distance vector protocols.
		Router R3 should be receiving EIGRP routes from R6 including a default route (0.0.0.0) and a route for R6’s Loopback0 interface 192.168.66.6.
	www.cs.fsu.edu /reference/itl/labs/igp/igp.htm (1028 words)

	IGRP Jobs, Average Salary for Interior Gateway Routing Protocol (IGRP) Skills
		IGRP Jobs, Average Salary for Interior Gateway Routing Protocol (IGRP) Skills
		Included is a guide to the average salaries offered in IT job ads that have cited IGRP over the last 3 month to 15 September 2006 with a comparison to the same period last year.
		This section looks at the demand and provides a guide to the average salaries quoted in job ads citing IGRP within the UK region over the last 3 months to 15 September 2006.
	www.itjobswatch.co.uk /jobs/uk/igrp.do (269 words)

	The TCP/IP Guide - Interior Gateway Routing Protocol (IGRP)
		First, there must be either a lack of a suitable open protocol, or a gap in the feature coverage of existing open protocols that creates an “opportunity” for a proprietary protocol to succeed.
		Second, the proprietary protocol must be either initiated or strongly supported by a “big player” in the industry, to help ensure that other companies will take notice and give the protocol a chance to become a standard.
		IGRP—which conveniently uses both the words “gateway” and “routing” in its name to convey the equivalence of the two words in internetworking standards—was designed specifically to be a replacement for RIP.
	www.tcpipguide.com /free/t_InteriorGatewayRoutingProtocolIGRP.htm (662 words)

	Building Scalable Cisco Internetworks (Site not responding. Last check: 2007-11-02)
		With multiple connections, the Border Gateway Protocol (BGP) is an alternative to using default routes to control path selections.
		Identify the relationships between the Enhanced Interior Gateway Routing Protocol (EIGRP) database and the IP routing table.
		Identify guidelines for migrating to a new routing protocol.
	www.entinst.ca /T-building_scalable_cisco_internet.htm (2003 words)

	What is Enhanced Interior Gateway Routing Protocol? - A Word Definition From the Webopedia Computer Dictionary (Site not responding. Last check: 2007-11-02)
		Abbreviated as EIGRP, an evolved version of IGRP that addresses the demands of large-scale internetworks and the changes in network technology that have been developed since the implementation of IGRP.
		Routers that already use IGRP can use EIGRP because the metrics for both protocols are directly translatable, i.e., they are as easily comparable as if they were routes that originated in their own autonomous systems.
		Unlike some earlier routing protocols that would send an entire table to neighboring routers when one routing table entry changed, EIGRP notifies the neighbors of only the specific change in the table.
	webopedia.com /TERM/E/Enhanced_Interior_Gateway_Routing_Protocol.html (207 words)

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