What is the formula that EIGRP uses in scaling the bandwidth,delay,total metric?

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How the EIGRP calculates the total metric ?
Posted by:
Ch Pavan Kumar
07-February-2014

Question added by Ch Pavan Kumar , Worked as Network Monitoring & Maintaining (Trainee) , Indian Oil Corporation Limited
Date Posted: 2014/02/07

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by Hytham Mohamed Mohamed Mostafa , Network Engineer , Mobily

EIGRP adds together weighted values of different network link characteristics in order to calculate a metric for evaluating path selection. These characteristics include:

• Delay (measured in10s of microseconds)

• Bandwidth (measured in kilobytes per second)

• Reliability (in numbers ranging from1 to255;255 being the most reliable)

• Load (in numbers ranging from1 to255;255 being saturated)

Various constants (K 1 through K 5) are able to be set by a user to produce varying routing behaviors. However by default, only delay and bandwidth are used in the weighted formula to produce a single32bit metric: