Redistributing RIP into EIGRP

Unanswered Question
May 24th, 2007
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I have been trying to plug in the different metrics (bandwidth, delay, reliability, load, and mtu) into the EIGRP metric formula, but have been unsuccessful at figuring out how it comes up with the composite metric. Here is the info I have


default metric 45000 500 255 3 1500 (config in router)

composite metric = 184832 (sh ip eigrp topo)


Can someone help me plug the numbers in so I can figure this out?

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Overall Rating: 4 (3 ratings)
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mohammedmahmoud Thu, 05/24/2007 - 09:15
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Hi,


The formula is:


Metric = (Bandwidth + Delay) * 256


Bandwidth for EIGRP = 10^7 / Interface Bandwidth (in kpbs)

Delay for EIGRP = Interface Delay (in micro.s) / 10



Do the math and i think it should give you the result, and bare in mind that by default only bandwidth and delay are considered (K1=K3=1, and K2=K4=K5=0).



HTH, please do rate all helpful replies,

Mohammed Mahmoud.

gastamant Thu, 05/24/2007 - 11:58
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Thanks Mohammed for the quick response.


How do I know all the K values are defaulted?

If I add a default-metric statement under EIGRP, do the K values change?

mohammedmahmoud Thu, 05/24/2007 - 12:25
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Hi,


The K values can only be changed using the "metric weights 0 k1 k2 k3 k4 k5" command.


NOTE: The first 0 in the command is Type Of Service (Only TOS 0 supported - thus it is always 0).



HTH, please do rate all helpful replies,

Mohammed Mahmoud.




Richard Burts Thu, 05/24/2007 - 12:29
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Gary


If you add a default-metric statement under EIGRP it does not change the K values. If you want to check to see if the weights have been changed then you should look in the configuration under router eigrp and look for metric weight command.


This link has information that explains more about this if you want more information:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fiprrp_r/1rfeigrp.htm#wp1023638


In general most of us believe that it is much better to leave the EIGRP metric weights at their default value.


HTH


Rick

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