Chapter 5 Routing Protocols: IGRP Building a Network To Be Reliable provide error detection and ability to correct errors To Provide Connectivity ... – PowerPoint PPT presentation
1 Chapter 5 Routing Protocols IGRP 2 Building a Network
To Be Reliable provide error detection and ability to correct errors
To Provide Connectivity incorporate a variety of hardware software products so they can function together
To Be Easy To Use users need to have no concern for the networks structure and implementation
To Be Easy To Modify allow itself to evolve and adapt as needs change
Be Easy To Implement must follow industry standards and allow a variety of configurations
3 Path Determination
Usually the responsibility of the router
4 Path Determination
Enables a router to evaluate the available paths to a destination and establish best path for the packet
Most routing protocols use simply use the shortest and best path
Analogy Packet routing is like driving a car Routers through the use of protocols make path decisions based on routing tables, and people driving cars determine their paths by reading road signs
5 Metrics
Routing tables must be updated and accurate
Each routing protocol interprets the best path in its own way
Protocol generates a value, METRIC, for each path through the network
Smaller the metric the better the path
Metrics differ depending on the protocol being used
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