Distance vector routing protocols

Bài giảng Các giao thức định tuyến: DSDV (Destination-sequenced distance-vector routing protocol). Chương này cung cấp cho học viên những nội dung gồm: introduction distance-vector; the property of ad-hoc networks; routing protocol; routing algorithm; link-state; DSDV protocol; route advertisements;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

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Bài 3 giới thiệu giao thức định tuyến distance-vector. Sau khi học xong bài học này người học có thể: Nhận biết biết được các giao thức định tuyến Distance Vector Routing Protocol; giải thích thích được đặc điểm và cách RIPv1/RIPv2 hoạt động; trình bày bày được đặc điểm, thuật toán DUAL sử dụng trong giao thức định tuyến EIGRP; cấu hình hình được các giao thức định tuyến RIPv1/RIPv2/EIGRP.

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The following will be discussed in this chapter: Identify the characteristics of distance vector routing protocols, describe the network discovery process of distance vector routing protocols using Routing Information Protocol (RIP), describe the processes to maintain accurate routing tables used by distance vector routing protocols,...

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This chapter explain the basic operation of dynamic routing protocols, compare and contrast dynamic and static routing, determine which networks are available during an initial network discovery phase, define the different categories of routing protocols,...

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In this chapter: Identify the characteristics of distance vector routing protocols, describe the network discovery process of distance vector routing protocols using Routing Information Protocol (RIP), describe the processes to maintain accurate routing tables used by distance vector routing protocols,...

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Enhanced Interior Gateway Routing Protocol (EIGRP)  Distance vector.  Classless routing protocol.
Released in 1992 with Cisco IOS Software Release 9.21.
Enhancement of Cisco Interior Gateway Routing Protocol (IGRP).
Both are Cisco proprietary.  Operate only on Cisco routers.The term hybrid routing protocol is sometimes used to define EIGRP.  Misleading, not a hybrid between distance vector and link-state  Solely a distance vector routing protocol.

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There are advantages and disadvantages to using any type of routing protocol.  Some of their inherent pitfalls, and.  Remedies to these pitfalls.
Understanding the operation of distance vector routing is critical to enabling, verifying, and troubleshooting these protocols.RIP: Routing Information Protocol originally specified in RFC 1058.  Metric: Hop count  Hop count greater than 15 means network is unreachable.  Routing updates: Broadcast/multicast every 30 seconds

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Upon completing this lesson, you will be able to: Describe the features offered by distance vector routing protocols and give examples of each Describe the issues associated with distance vector routing and identify solutions to those issues

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Source generates data to be transmitted Transmitter Converts data into transmittable signals Transmission System Carries data Receiver Converts received signal into data Destination Takes incoming data

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Direct Systems share a point to point link or Systems share a multi-point link Data can pass without intervening active agent Indirect Switched networks or Internetworks or internets Data transfer depend on other entities

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Small frequently issued packets Discover neighbours and negotiate "adjacencies" Verify continued availability of adjacent neighbours Hello packets and Link State Advertisements (LSAs) build and maintain the topological database Hello packets are addressed to 224.0.0.5.

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Traditional Distance Vector Routing Protocols. • Use the Bellman-Ford or Ford-Fulkerson algorithm. • Age out routing entries and uses periodic updates. • Keep track of only the best routes; the best path to a destination network. • When a route becomes unavailable, the router must wait for a new routing update. • Slower convergence due to holddown timers.

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Các giao thức cổng nội (Interior Routing Protocols) I. Classfull routing protocol I.1. RIPv1 Routing Information Protocol (RIP) là giao thức định tuyến vector kho ảng cách (Distance Vector Protocol) xuất hiện sớm nhất.

6p congnghe08 21-07-2011 146 47   Download

Developed in 1985 to overcome RIPv1’s limited hop count -Distance vector routing protocol -Metrics used b IGRP M ti d by bandwidth (used by default) Delay (used by default) Reliability (not used by default) Load (not used by default) -Discontinued support starting with IOS 12.2(13)T & 12.2(R1s4)S

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Identify the characteristics of distance vector routing p y g protocols. Describe the network discovery process of distance vector routing protocols using Routing Information Protocol (RIP). Describe the processes to maintain accurate routing tables used by distance vector routing protocols. Identify the Id tif th conditions l di t a routing l diti leading to ti loop and explain th d l i the implications for router performance.

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Distance vector routing protocols are like road signs because routers must make preferred path decisions based on a distance or metric to a network. – Link-state routing protocols are more like a road map because they create a topological map of the network and each router uses this map to determine the shortest path to each network. – The ultimate objective is that every router receives all of the link-state information about all other routers in the routing area.

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EIGRP is a distance vector, classless routing protocol that was released in 1992 with IOS 9 21 9.21. As its name suggests, EIGRP is an enhancement of Cisco IGRP (Interior Gateway Routing Protocol). Both are Cisco proprietary protocols and only operate on Cisco routers.

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Identify the characteristics of distance vector routing p y g protocols. Describe the network discovery process of distance vector routing protocols using Routing Information Protocol (RIP). Describe the processes to maintain accurate routing tables used by distance vector routing protocols.

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Describe the role o dy a c routing pooco sad esc be e o e of dynamic ou g protocols and place these protocols in the context of modern network design. Identify several ways to classify routing protocols. Describe how metrics are used by routing protocols and identify the metric types used by dynamic routing protocols. Determine the administrative distance of a route and describe its importance in the routing process. Identify the different elements of the routing table.

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Most routing protocols fall into one of two classes: distance vector or link state. The basics of distance vector routing protocols are examined here; the next section covers link state routing protocols. Most distance vector algorithms are based on the work done of R. E. Bellman, L. R. Ford, and D. R. Fulkerson, and for this reason occasionally are referred to as BellmanFord or FordFulkerson algorithms. A notable exception is EIGRP, which is based on an algorithm developed by J. J. Garcia Luna Aceves....

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