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Topic: EIGRP

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	Enhanced Interior Gateway Routing Protocol (EIGRP)
		EIGRP relies on four fundamental concepts: neighbor tables, topology tables, route states, and route tagging.
		Cisco Systems's EIGRP is one of the most feature-rich and robust distance vector routing protocols to ever be developed.
		EIGRP is also remarkably easy to configure and use, as well as remarkably efficient and secure in operation.
	www.cisco.com /univercd/cc/td/doc/cisintwk/ito_doc/en_igrp.htm (2024 words)

	Enhanced Interior Gateway Routing Protocol - Wikipedia, the free encyclopedia
		EIGRP is a distance vector 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.
		EIGRP is able to deal with classless interdomain routing allowing the use of VLSM which is its main advantage over its predecessor.
	en.wikipedia.org /wiki/EIGRP (435 words)

	Cisco EIGRP
		The metric for EIGRP is calculated by multiplying the IGRP metric by 256.
		Reliable Transport refers to the fact that EIGRP is TCP based and therefore has the ability to use TCP based transmission when it is necessary to guarantee that a neighbor received a communication.
		EIGRP stands for Diffusing Update Algorithm and differs from other routing protocols in that routing calculations are shared among multiple routers.
	networking.ringofsaturn.com /Cisco/eigrp.php (1123 words)

	EIGRP Overview
		EIGRP uses a composite metric composed of Bandwidth, Delay, Reliability, and Loading to determine the best path between two locations.
		EIGRP is classless, meaning it does include the subnet mask in routing updates.
		The EIGRP metric is a can be a complex calculation, but by default it only uses bandwidth and delay to determine the best path.
	www.boson.com /netsim/free/bsn/eigrp/eigrp_overview.htm (277 words)

	The TCP/IP Guide - Enhanced Interior Gateway Routing Protocol (EIGRP)
		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).
		EIGRP is based on a new route calculation algorithm called the Diffusing Update Algorithm (DUAL), developed at a company called SRI International by Dr. J.
		EIGRP uses a metric that combines an assessment of the bandwidth of a link and the total delay to send over the link.
	www.tcpipguide.com /free/t_EnhancedInteriorGatewayRoutingProtocolEIGRP.htm (539 words)

	EIGRP notes
		EIGRP, rather than discard all routes learned, will build a topology table from it's neighbor's advertisements and converge by simply looking for the next available route or send a query to a neighbor if the route is not held in the local table.
		EIGRP can use upto five variables to generate the metric; bandwidth, delay, load, reliability and mtu.
		EIGRP with split-horizon will not advertise a route out of an interface where it has learned of that route if that interface is seen to be the path to that route.
	www.kccommunications.com /htdocs/EIGRP%20summary.htm (3122 words)

	EIGRP, ip routing, igrp
		Cisco's EIGRP is similar to IGRP only in the sense that it uses the same metrics; Delay, Bandwidth, Reliability and Load.
		EIGRP uses Split Horizon and Poison Reverse to ensure that routes learned on a particular interface are not re-advertised out of that same interface, or if they are, that they are advertised as unreachable.
		If an EIGRP network is particularly large, or there are a number of low bandwidth links such that it takes a while for replies to get back, then those neighbours that have yet to reply have their Reply Status flag set.
	www.rhyshaden.com /eigrp.htm (3268 words)

	EIGRP Commands
		EIGRP summary routes are given an administrative distance value of 5.
		This is the number of milliseconds it takes for an EIGRP packet to be sent to this neighbor and for the local router to receive an acknowledgment of that packet.
		Passive and Active refer to the EIGRP state with respect to this destination; Update, Query, and Reply refer to the type of packet that is being sent.
	www.cisco.com /univercd/cc/td/doc/product/software/ios120/12cgcr/np1_r/1rprt1/1reigrp.htm (3737 words)

	TechExams.Net - CCNP BSCI TechNote: EIGRP
		In contrary to IGRP, EIGRP is consider to be a hybrid routing protocol, because it has distance vector as well as link-state characteristics.
		EIGRP allows for secure routing updates using authentication, to prevent unauthorized or false routing messages, although this is disabled by default.
		EIGRP supports load balancing over unequal paths, this means adding multiple primary routes for a single destination to the routing table even if the metrics are not the equal.
	www.techexams.net /technotes/bsci/eigrp.shtml (1550 words)

	How Does Unequal Cost Path Load Balancing (Variance) Work in IGRP and EIGRP? - Cisco Systems
		EIGRP includes all routes that have a metric of less than 40 and satisfy the feasibility condition.
		EIGRP does not use path E-D-A because that path has a metric of 45, which is not less than the value of the minimum metric of 40, because of the variance configuration.
		In this example, EIGRP sends one packet to E-C-A and one packet to E-B-A. Now, assume that the metric between E-B is 25 and the metric between B-A is 15.
	www.cisco.com /en/US/tech/tk365/technologies_tech_note09186a008009437d.shtml (1176 words)

	IP Routing: Chapter 4: Enhanced Interior Gateway Routing Protocol (EIGRP)
		EIGRP differs in that it saves not only the best (least-cost) route but all routes, allowing convergence to be much quicker.
		The default behavior of EIGRP is to summarize on network-number boundaries.
		EIGRP uses the bandwidth that is configured on an interface to decide how much EIGRP traffic to generate.
	www.oreilly.com /catalog/iprouting/chapter/ch04.html (6394 words)

	911networks.com - Cisco - EIGRP Notes
		Static routes are automatically advertised by EIGRP if next hop is interface and the interface is covered by the network statement.
		EIGRP Delays are the accumulation of outbound interfaces from source to destination.
		If 2 EIGRP domains are on same routers, they need to be redistributed manually into each other.
	www.911networks.com /index.php/Cisco/EIGRPNotes (158 words)

	What you need to know about EIGRP
		EIGRP uses the Diffusing-Update Algorithm (DUAL) to perform look-free routing and calculate the shortest path.
		Like OSPF, EIGRP uses autonomous system numbers to identify areas of the network that are under a single administrative domain.
		EIGRP carries the subnet mask in the routing update, and it does support both variable length subnet masks (VLSM) and Classless Inter-Domain Routing (CIDR).
	www.setup32.com /network-administration/networking/know-eigrp.php (998 words)

	Enhanced Internal Gateway Routing Protocol (EIGRP)
		EIGRP is a hybrid protocol as it incorporates features of a Distance Vector routing protocol and features of a Link State routing protocol.
		EIGRP is often used in Cisco-based networks running multiple network-layer protocols.
		EIGRP can redistribute its routes (and metrics) intoother routing protocols and accepts redistribution from other routing protocols as well.
	www.inetdaemon.com /tutorials/internet/ip/routing/eigrp/index.shtml (669 words)

	EIGRP Stub Routing
		When using the EIGRP Stub Routing feature, you need to configure the distribution and remote routers to use EIGRP, and to configure only the remote router as a stub.
		If a route is lost somewhere in the corporate network, EIGRP could send a query to the distribution router, which in turn will send a query to the remote router even if routes are being summarized.
		eigrp stub command to configure a router as a stub where the router directs all IP traffic to a distribution router.
	www.cisco.com /univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s15/eigrpstb.htm (2961 words)

	[No title]
		You may have noticed that EIGRP is not mentioned as being either of these types of routing protocols.
		That is because EIGRP is typically described as “a distance vector protocol that acts like a link state protocol.” EIGRP is the best of both types because it uses the diffusing update algorithm (DUAL).
		As EIGRP is a dynamic routing protocol, its true purpose is visible when you see your test network going through changes.
	techrepublic.com.com /5102-1035-1039414.html (952 words)

	bugtraq 2002/12: Re: Cisco IOS EIGRP Network DoS
		The EIGRP implementation in all versions of IOS is vulnerable to a denial of service if it receives a flood of neighbor announcements.
		EIGRP is a Ciscos' extension of IGP routing protocol used to propagate routing information in internal network environments.
		The issue with EIGRP neighbor command FX is referring to is assigned Cisco Bug ID CSCdv19648 and is visible to all registered users through Cisco's Bug Toolkit at http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.
	lists.jammed.com /bugtraq/2002/12/0211.html (502 words)

	IP Routing
		EIGRP uses DUAL to determine whether a path advertised by a neighbor is looped or loop-free.
		EIGRP avoids sending packets to down routers because it uses a neighbor discovery/recovery mechanism to dynamically learn about other routers on its directly attached network.
		EIGRP discovers when neighbors become unreachable or inoperative with low achieved because it periodically sends small hello packets so that neighboring routers know it's functioning.
	www.wilsonmar.com /1routing.htm (3394 words)

	Troubleshooting EIGRP > Troubleshooting EIGRP Neighbor Relationships (Site not responding. Last check: 2007-11-04)
		EIGRP is an advanced distance-vector protocol; it doesn't have LSA flooding, like OSPF, or a link-state protocol to tell the protocol the overall view of the network.
		If, in three minutes, EIGRP doesn't receive the query response from all its neighbors, EIGRP declares that the route is stuck in active state and resets the neighbor that has not responded to the query.
		Figure 7-10 shows the cascade effect of the EIGRP query process, in which the query travels from the original router to the edge of the network and back to the original router.
	www.informit.com /articles/article.asp?p=27839&f1=rss (5375 words)

	EIGRP
		The router configuration file includes the network addresses of each router’s interface to attach with the EIGRP routing process, as well as additional configuration parameters.
		EIGRP has the option for configuring the EIGRP hold time.
		EIGRP has the option for configuring the EIGRP hello interval.
	www.cis.udel.edu /~jaikaeo/qualnet/manual/manual93.html (136 words)

	EIGRP Jobs, Average Salary & Contractor Rates for Enhanced Interior Gateway Routing Protocol (EIGRP) Skills
		Included is a guide to the average salary and contractor rates offered in IT job adverts that have cited EIGRP over the 3 months to 28 October 2005 and the previous quarter.
		This section compares the median salary and contractor rates quoted in job adverts citing EIGRP (A) against all those in the category of Communications & Networking (B) over the past 3 months.
		Jobs citing EIGRP are compared to all those in the category of Communications & Networking.
	www.itjobswatch.co.uk /skills_and_rates/eigrp.do (345 words)

	Configuring EIGRP between 2 Cisco Routers
		This documents assumes a base knowledge of networking as well as having read Part 1 of the manual (What is EIGRP and why do I need it).
		When EIGRP is working correctly, there will be a series of Hello packets that have been both sent and received.
		As long as EIGRP is working between the two routers, you should the other router listed in the neighbor table.
	www.kelley.iu.edu /itlabs/2004_Lab_Manuals/group3_2nd8_2004/group3_lab1_part2.html (777 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.
		EIGRP can be used not only for Internet Protocol (IP) networks but also for AppleTalk and Novell NetWare networks.
		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.
	searchnetworking.techtarget.com /sDefinition/0,,sid7_gci214442,00.html (375 words)

	EIGRP Route Map Support
		EIGRP can process permitted set and match parameters supplied by a route-map facility and extend filtering on added EIGRP-specific set and match choices.
		This command is not the same as the EIGRP assigned route metric, a figure computed from EIGRP vectorized metric components (delay, bandwidth, reliability, load, and MTU).
		This command may not be useful with a redistribution operation that employs route maps because redistribution usually requires the configuration of a source protocol and an autonomous system (AS) value in order to redistribute.
	www.cisco.com /univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_8/gteigrpr.htm (1889 words)

	The EIGRP Adjacency
		EIGRP is an important part of real-world networking as well as being a major topic on the 642-901 CCNP BSCI exam.
		EIGRP Update packets are generally multicast to 224.0.0.10, but during the first exchange of routes with a new neighbor, the Update packet is unicast.
		A major difference between EIGRP and OSPF adjacencies is that EIGRP speakers do not have to agree on hello and dead times, where an OSPF adjacency will never form between routers using different hello and dead times.
	www.itcertificationnews.com /itcertificationnews-53-20070406TheEIGRPAdjacency.html (508 words)

	Enhanced interior gateway routing protocol : EIGRP (Site not responding. Last check: 2007-11-04)
		It is able to deal with classless interdomain routing which is its main advantage over its predecessor.
		All is still licensed under the GNU FDL.
		You were at the house this morning; you did the room in which You say you did n't take.
	www.termsdefined.net /ei/eigrp.html (212 words)

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