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Bài giảng Mạng máy tính nâng cao (Advanced computer networks) - Chapter 06: Distance vector routing protocols

Objectives: 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. | DISTANCE VECTOR ROUTING PROTOCOLS MẠNG MÁY TÍNH NÂNG CAO Chapter06 Objectives 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. Identify the conditions leading to a routing loop and explain the implications for router performance. Recognize that distance vector routing protocols are in use today Distance Vector Routing Protocols Routing Information Protocol (RIP):RFC 1508 Hop count is used as the metric Max hop is 15 Routing updates are broadcast or multicast every 30 seconds Interior Gateway Routing Protocol (IGRP) Proprietary protocol developed by Cisco. Bandwidth, delay, load and reliability are used to create a composite metric. Routing updates are broadcast every 90 seconds, IGRP is the predecessor of EIGRP and is now obsolete Distance Vector . | DISTANCE VECTOR ROUTING PROTOCOLS MẠNG MÁY TÍNH NÂNG CAO Chapter06 Objectives 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. Identify the conditions leading to a routing loop and explain the implications for router performance. Recognize that distance vector routing protocols are in use today Distance Vector Routing Protocols Routing Information Protocol (RIP):RFC 1508 Hop count is used as the metric Max hop is 15 Routing updates are broadcast or multicast every 30 seconds Interior Gateway Routing Protocol (IGRP) Proprietary protocol developed by Cisco. Bandwidth, delay, load and reliability are used to create a composite metric. Routing updates are broadcast every 90 seconds, IGRP is the predecessor of EIGRP and is now obsolete Distance Vector Routing Protocols Enhanced Interior Gateway Routing Protocol (EIGRP) It can perform unequal cost load balancing. It uses Diffusing Update Algorithm (DUAL) to calculate the shortest path. Routing updates are sent only when there is a change in the topology. Distance Vector Technology The Meaning of Distance Vector: A router using distance vector routing protocols knows 2 things: Distance to final destination Vector or directiontraffic should be directed Distance Vector Technology Characteristics of Distance Vector routing protocols: Periodic updates Neighbors: Routing by rumor Broadcast updates 255.255.255.255 Entire routing table is included with routing update Routing Protocol Algorithms At the core of the distance vector protocol is the algorithm. The algorithm is used to calculate the best path then send that information to the neighbors. Routing Protocol Algorithm: Defined as a procedure for accomplishing a certain task Advantages and Disadvantages NETWORK DISCOVERY After a cold start