# EIGRP K Values Configuration

**URL:** <https://forum.networklessons.com/t/eigrp-k-values-configuration/1245>\
**Category:** Lessons Discussion\
**Created:** [December 29, 2016, 5:49pm UTC](https://forum.networklessons.com/t/eigrp-k-values-configuration/1245 "2016-12-29T17:49:07Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![ReneMolenaar](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/renemolenaar/32/488_2.png) [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)\
**Post date:** [March 5, 2018, 2:35pm UTC](https://forum.networklessons.com/t/eigrp-k-values-configuration/1245/6 "2018-03-05T14:35:28Z")

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Hi Stefanio,

As weird as it sounds, that’s exactly what they intend with energy yes 😄

Here’s an excerpt from RFC 7868:

> **[RFC 7868: Cisco's Enhanced Interior Gateway Routing Protocol (EIGRP)](https://datatracker.ietf.org/doc/html/rfc7868)**
>
> This document describes the protocol design and architecture for Enhanced Interior Gateway Routing Protocol (EIGRP). EIGRP is a routing protocol based on Distance Vector technology. The specific algorithm used is called "DUAL", a Diffusing Update...

> 5.5.4.2. Energy
> 
> Use of Energy-based Path Selection results in paths with the lowest  
> energy usage being selected in a loop-free and deterministic manner.  
> The amount of energy used is accumulative and has results in a higher  
> aggregate metric than those having lower energy.
> 
> Presently, EIGRP does not report energy usage, and as such the  
> default value will be zero (0).

On the Cisco site, you can find this:

> **[Enhanced Interior Gateway Routing Protocol (EIGRP)](https://www.cisco.com/c/en/us/products/ios-nx-os-software/enhanced-interior-gateway-routing-protocol-eigrp/index.html)**
>
> Cisco Enhanced Interior Gateway Routing Protocol (EIGRP) provides easy deployment and fast convergence in large enterprise networks.

> likewise energy would be expressed in power per kilobytes per second of usage

So the idea is to select an interface, based on how much power it consumes.

You can find the wide metrics formula (that includes K6) here:

> **[EIGRP Wide Metrics](https://networklessons.com/eigrp/eigrp-wide-metrics)**
>
> EIGRP supports wide metrics with a new composite cost metric formula that supports 64-bit values for high bandwidth interfaces.

Hope this helps!

Rene

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