Re: EIGRP Unequal Cost Loadbalancing

From: John (jgarrison1@austin.rr.com)
Date: Tue Oct 28 2008 - 01:26:25 ARST


You can look up the k values and the algorithim on the doccd. The important
part is to make the second route a feasible sucsessor. Once you've done
that you can refer to the algorithim to change the k values accordingly.
lots of fun to calculate. Conversly you can make the second route a
feasible sucsessor and then play with the delay and bandwidth on the FS's
hops by trial and error. Changing the default metrics won't help(I think)
----- Original Message -----
From: "Andrew Dempsey" <apdccie@gmail.com>
To: "Atlanta CCIE" <atlantaccie@gmail.com>
Cc: "ccie forum" <ccielab@groupstudy.com>
Sent: Monday, October 27, 2008 9:05 PM
Subject: Re: EIGRP Unequal Cost Loadbalancing

>I believe the workbook changes the K values using metric weights 0 0 0 1 0
>0
> to cause the routers to only use delay to calculate the metric. This
> simplifies the calculation and should make this a simple process if you
> know
> how to display the interface delay for each hop. You can also just leave
> the K values to default and play around with the metrics until you get it
> right, which although not really very scientific still works.
>
> On Mon, Oct 27, 2008 at 10:59 PM, Atlanta CCIE
> <atlantaccie@gmail.com>wrote:
>
>> I thought I had unequal cost load balancing figured out until I ran into
>> task 3.7 IEWB Vol 2 Lab 8. The task states that we need to achieve 4:1
>> load
>> balancing. IE SG says use whatever values to get 4:1 ratio. My question
>> is
>> HOW do I come up with these values? I tried a few random values but
>> didn't
>> work.
>>
>> Can someone explain to me HOW you got 4:1 ratio? It would be nice if its
>> a
>> step by step process.
>>
>> Basically the topology is something like this
>>
>>
>> R4
>>
>> | -
>>
>> | -
>>
>> | R1
>>
>> | -
>>
>> | -
>>
>> R5
>>
>> |
>>
>> |
>>
>> |
>>
>> BB2
>>
>>
>> So R4 and R5 have an ethernet connection between them and they are also
>> connected via frame-relay cloud through R1. IE uses delay to achieve the
>> 4:1
>> ratio. Anyone who has worked this lab can shed some light? I thought I
>> knew
>> unequal cost load balancing but I guess not :(
>>
>>
>> Thanks guys!
>>
>>
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