1. IGRP https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

2. IGRP 1 'Interior Gateway Routing Protocol' ('IGRP') is a distance-vector routing protocol|distance vector Interior Gateway Protocol|interior routing protocol (IGP) developed by Cisco Systems, Inc.|Cisco. It is used by Router (computing)|routers to exchange routing data within an autonomous system (Internet)|autonomous system. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

3. IGRP 1 The maximum hop count of IGRP-routed packets is 255 (default 100), and routing updates are Broadcasting (computing)|broadcast every 90 seconds (by default).[ http://www.cisco.com/en/US/docs/ios/12_2 /ip/configuration/guide/1cfigrp.html Cisco Systems] Configuring IGRP IGRP uses port number 9 for communication. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

4. IGRP 1 IGRP is considered a Classful network|classful routing protocol https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

5. IGRP - Advancement 1 In the new Cisco CCNA curriculum (version 4), IGRP is mentioned only briefly, as an obsolete protocol. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

6. Enhanced Interior Gateway Routing Protocol - EIGRP composite and vector metrics 1 EIGRP associates six different vector metrics with each route and considers only four of the vector metrics in computing the Composite metric: https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

7. Enhanced Interior Gateway Routing Protocol - EIGRP composite and vector metrics 1 ;Hop Count: Number of routers a packet passes through when routing to a remote network, used to limit the EIGRP AS. EIGRP maintains a hop count for every route, however, the hop count is not used in metric calculation. It is only verified against a predefined maximum on an EIGRP router (by default it is set to 100 and can be changed to any value between 1 and 255). Routes having a hop count higher than the maximum will be advertised as unreachable by an EIGRP router. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

8. EIGRP 1 The protocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers, but Cisco converted it to an open standard in 2013.Cisco Systems (2013), [http://www.cisco.com/en/US/prod/collateral/i osswrel/ps6537/ps6554/ps6599/ps6630/qa_ C67-726299.html Enhanced Interior Gateway Routing Protocol (EIGRP) Informational RFC Frequently Asked Questions], retrieved 14 September 2013 https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

9. EIGRP 1 EIGRP is used on a router (computing)|router to share routes with other routers within the same Autonomous System (Internet)|autonomous system. Unlike other well known routing protocols, such as routing information protocol|RIP, EIGRP only sends incremental updates, reducing the workload on the router and the amount of data that needs to be transmitted. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

10. EIGRP - Overview 1 The Enhanced Interior Gateway Routing Protocol replaced the Interior Gateway Routing Protocol (IGRP) in 1993.[http://www.differencebetween.net/technolog y/internet/difference-between-igrp-and-eigrp IGRP and EIGRP | Difference Between | IGRP vs EIGRP]. Difference Between (2011-05-19). Retrieved on 2014-05-30. One of the major reasons for this was because the design of the Internet Protocol had been changed to support IPv4 address|classless IPv4 addresses, which IGRP could not support. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

11. EIGRP - Overview 1 Almost all router (computing)|routers contain a routing table that contains rules by which traffic is forwarded in a network. If the router does not contain a valid path to the destination, the traffic is discarded. EIGRP is a dynamic routing protocol by which routers automatically share route information. This eases the workload on a network administrator who does not have to configure changes to the routing table manually. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

12. EIGRP - Overview 1 In addition to the routing table, EIGRP uses the following tables to store information: https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

13. EIGRP - Overview 1 Active indicates that EIGRP is still trying to calculate the best path for the specific route https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

14. EIGRP - Overview 1 This behavior is more inline with link-state routing protocols, thus EIGRP is mostly considered a hybrid protocol. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

15. EIGRP - Overview 1 When a router (computing)|router running EIGRP is connected to another router also running EIGRP, information is exchanged between the two routers and a relationship is formed known as an adjacency. The entire routing table is exchanged between both routers at this time. After this has occurred, only differential changes are sent. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

16. EIGRP - Features 1 EIGRP supports the following features: https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

17. EIGRP - Features 1 * Backwards compatibility with the IGRP routing protocols.[http://www.cisco.com/en/US/tec h/tk365/technologies_tech_note09186a00 80093f07.shtml Introduction to EIGRP]. Cisco. Retrieved on 2014-05-30. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

18. EIGRP - Cisco IOS example 1 Example of setting up EIGRP on a Cisco IOS router for a private network. The 0.0.15.255 wildcard character|wildcard in this example indicates a subnetwork with a maximum of 4094 hosts—it is the bitwise complement of the subnet mask 255.255.240.0. The 'no auto-summary' command prevents automatic route summarization on classful boundaries, which would otherwise result in routing loops in discontiguous networks. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

19. EIGRP - Technical details 1 EIGRP determines the value of the path using four metrics: bandwidth, load, delay, and reliability.Cisco Systems (2012), [http://www.cisco.com/c/en/us/products/col lateral/ios-nx-os-software/enhanced- interior-gateway-routing-protocol- eigrp/whitepaper_C11-720525.html Enhanced Interior Gateway Routing Protocol (EIGRP) Wide Metrics], retrieved 14 March 2014 https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

20. EIGRP - Technical details 1 EIGRP routing information exchanged to a router from another router within the same autonomous system has a default administrative distance of 90. EIGRP routing information that has come from an EIGRP- enabled router outside the autonomous system has a default administrative distance of 170.Cisco Systems (2013), [http://www.cisco.com/en/US/tech/tk365/tech nologies_tech_note09186a0080094195.shtml What is Administrative Distance?], retrieved 14 September 2013 https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

21. EIGRP - Technical details 1 EIGRP uses List of IP protocol numbers|protocol number 88. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

22. EIGRP - Distance vector routing protocol 1 EIGRP a fast routing protocol based on distance vectors https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

23. EIGRP - Routing metric 1 By default, only total delay and minimum bandwidth are considered when EIGRP is started on a router, but an administrator can enable or disable all the K values as needed to consider the other Vector metrics. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

24. EIGRP - Routing metric 1 Obviously, these constants must be set to the same value on all routers in an EIGRP system, or permanent routing loops may result. Cisco routers running EIGRP will not form an EIGRP adjacency and will complain about K-values mismatch until these values are identical on these routers. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

25. EIGRP - Routing metric 1 EIGRP scales the interface Bandwidth and Delay configuration values with following calculations: https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

26. EIGRP - Routing metric 1 EIGRP takes this value directly without scaling into the weighted formula https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

27. EIGRP - Routing metric 1 This way, redistributing information between EIGRP and IGRP involves simply dividing or multiplying the metric value by a factor of 256, which is done automatically. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

28. EIGRP - Feasible successor 1 Thus, every successor is also a feasible successor. However, in most references about EIGRP the term feasible successor is used to denote only those routes which provide a loop-free path but which are not successors (i.e. they do not provide the least distance). From this point of view, for a reachable destination there is always at least one successor, however, there might not be any feasible successors. https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

29. EIGRP - Feasibility condition 1 The feasibility condition is a sufficient condition for loop freedom in EIGRP- routed network. It is used to select the successors and feasible successors that are guaranteed to be on a loop-free route to a destination. Its simplified formulation is strikingly simple: https://store.theartofservice.com/itil-2011-foundation-complete-certification-kit-fourth-edition-study-guide-ebook-and-online-course.html

30. For More Information, Visit: https://store.theartofservice.co m/itil-2011-foundation- complete-certification-kit- fourth-edition-study-guide- ebook-and-online-course.html https://store.theartofservice.co m/itil-2011-foundation- complete-certification-kit- fourth-edition-study-guide- ebook-and-online-course.html The Art of Service https://store.theartofservice.com