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Home > Forums > Communications Rack > Networking > Cisco: Routers Forum

EIGRP K Values

Read More Threads Like This One

njang (TechnicalUser)

4 Jan 01 16:50

Can anyone tell me what the K values represent?
K1-K5 I Know they are the metrics but dont know which one is what.

Thanks

wybnormal (TechnicalUser)

4 Jan 01 18:17

From cisco's own pages:

You can adjust the default behavior of IP Enhanced IGRP routing and metric computations. For example, this adjustment allows you to tune system behavior to allow for satellite transmission. Although IP Enhanced IGRP metric defaults have been carefully selected to provide excellent operation in most networks, you can adjust the IP Enhanced IGRP metric. Adjusting IP Enhanced IGRP metric weights can dramatically affect network performance, so be careful if you adjust them.

To adjust the IP Enhanced IGRP metric weights, use the following command in router configuration mode: Command Purpose
metric weights tos k1 k2 k3 k4 k5
Adjust the IP Enhanced IGRP metric.

--------------------------------------------------------------------------------
Note Because of the complexity of this task, it is not recommended unless it is done with guidance from an experienced network designer.
--------------------------------------------------------------------------------

By default, the IP Enhanced IGRP composite metric is a 32-bit quantity that is a sum of the segment delays and the lowest segment bandwidth (scaled and inverted) for a given route. For a network of homogeneous media, this metric reduces to a hop count. For a network of mixed media (FDDI, Ethernet, and serial lines running from 9600 bps to T1 rates), the route with the lowest metric reflects the most desirable path to a destination.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/np1_c/1cprt1/1ceigrp.htm

Mike S

njang (TechnicalUser)

4 Jan 01 18:20

but which K value equals which metric ie: BW, Delay,MTU, ...?

-thanks

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