Link state 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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Upon completion you will be able to: Differentiate between a unicast, multicast, and broadcast message; know the many applications of multicasting; understand multicast link state routing and MOSPF; understand multicast link state routing and DVMRP; understand the Core-Based Tree Protocol; understand the Protocol Independent Multicast Protocols; understand the MBONE concept.

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Bài 4 giới thiệu về Link-State Routing Protocol. Thông qua bài học này người học có thể trình bày được thuật toán SPF, nắm bắt được đặc điểm của Link-state Routing Protocol và đặc điểm của giao thức định tuyến OSPF. Mời các bạn cùng tham khảo để nắm bắt các nội dung chi tiết.

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Upon completion of this lesson, the successful participant will be able to: Describe the basic features & concepts of link-state routing protocols, list the benefits and requirements of link-state routing protocols.

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In this chapter, you learned to: Describe OSPF terminology and operation within various enterprise environments, describe the function and operation of packets in OSPF routing, configure and verify basic OSPF, describe and configure OSPF in various WAN network types,...

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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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After studying this chapter you will be able to: Describe the basic features & concepts of link-state routing protocols, list the benefits and requirements of link-state routing protocols.

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Tài liệu hướng dẫn thực hành CCNA: Bài 17 - Cấu hình OSPF cơ bản giới thiệu đến bạn đọc về giao thức OSPF (Open Shortest Path First) thuộc loại link-state routing protocol và được hổ trợ bởi nhiều nhà sản xuất. OSPF sử dụng thuật toán SPF để tính toán ra đường đi ngắn nhất cho một route. Giao thức OSPF có thể được sử dụng cho mạng nhỏ cũng như một mạng lớn. Mời các bạn tham khảo.

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RouterB(config)#interfaces 1RouterB(config-if)#ipadd 192.168.1.1 255.255.255.0RouterB(config-if)#noshutdown00:59:48: %LINK-3-UPDOWN: Interface Serial1, changed state to up00:59:48: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1, changed stateto up00:59:48: RT: add 192.168.1.0/24 via 0.0.0.0, connected metric [0/0]00:59:48: RT: interface Serial1 added to routing tableRouterB(config-if)#endRouterB#undebugallAll possible debugging has been turned offRouterB#

36p vanmanh1008 21-05-2013 56 4   Download

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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Link-State Routing Process 1. Each router learns about its own links, its own directly connected networks. (Interface is “up”) 2. Each router is responsible for meeting its neighbors on directly connected networks. (OSPF Hello packets) 3. Each router builds a link-state packet (LSP) containing the state of each directly connected link. (neighbor ID, link type, and bandwidth) 4. Each router floods the LSP to all neighbors, who then store all LSPs received in a database. Neighbors then flood the LSPs to their neighbors until all routers in the area have received the LSPs. 5.

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Upon completing this lesson, you will be able to: Describe the issues associated with link-state routing and identify solutions to those issues Describe the features of balanced hybrid routing protocols

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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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OSPF dùng giải thuật SPF để tính tóan đường đi. Giải thuật này còn được gọi là giải thuật Dijkstra. Các routing protocol nhóm link state không broadcast tòan bộ thông tin về bảng định tuyến giống như RIP/IGRP và thay vào đó, OSPF sẽ dùng một quá trình để khám phá các láng giềng (neighbor). Các láng giềng cũng có thể được định nghĩa tĩnh.

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Tham khảo tài liệu 'link-state routing protocolsrouting protocols and concepts – chapter 10', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

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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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Objectives: Describe the basic features & concepts of link-state p routing protocols.

28p thanhtung_hk 07-12-2010 141 25   Download

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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Link-State Routing Protocols. Objectives: Describe the basic features & concepts of link-state p routing protocols. 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.

28p thanhtung_hk 05-11-2010 107 25   Download

The Complete IS-IS Routing Protocol- P19:IS-IS has always been my favourite Interior Gateway Protocol. Its elegant simplicity, its well-structured data formats, its flexibility and easy extensibility are all appealing – IS-IS epitomizes link-state routing. Whether for this reason or others, IS-IS is the IGP of choice in some of the world’s largest networks. Thus, if one is at all interested in routing, it is well worth the time and effort to learn IS-IS.

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