By Bill Reed How EIGRP works Route Discovery INTERNAL ROUTES Internal routes are defined as: Those routes that originate within the EIGRP autonomous system Internal route updates contain the following information: Next hop Delay Bandwidth MTU Hop count Reliability Load Prefix length Destination The calculation of the metrics looks like this: (K2 x (Be x 256))/(256 – load) + K3 x (Dc x 256) x (K5/(reliability + K4)) [Be and Dc are multiplied by 256] K1 = Bandwidth Weight K2 = Load weight K3 = Delay weight K4 = Secondary reliability weight K5 = Primary reliability weight Be = Bandwidth component * Dc = Delay component *
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