From: Jacky Murphy (ccie@maitruongxua.com)
Date: Thu Jun 23 2005 - 01:49:26 GMT-3
Hi,
in my case: E-D-A with a metric of 40
* E-B-A with a metric of 30
* E-C-A with a metric of 20
* E-D-A with a metric of 40 <*********
variance = 2
This increases the minimum metric to 40 (2 * 20 = 40)
For a route to be considered for unequal-cost load-sharing, it's metric must
be strictly less than the best-metric * the variance?
How about a route equal the best-metric * the variance?
Thanks,
Jacky
----- Original Message -----
From: "san" <san.study@gmail.com>
To: "Jacky Murphy" <ccie@maitruongxua.com>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, June 22, 2005 11:50 PM
Subject: Re: "variance" in load balancing EIGRP
> http://www.cisco.com/warp/public/103/19.html#var
>
> copy paste from above url...
> Let us look at an example. In the network diagram, there are three
> ways to get to Network X:
>
> *
>
> E-B-A with a metric of 30
> *
>
> E-C-A with a metric of 20
> *
>
> E-D-A with a metric of 45
>
> Router E chooses the second path above, E-C-A with a metric of 20,
> because 20 is better than 30 and 45. To instruct EIGRP to select the
> path E-B-A as well, configure variance with a multiplier of 2:
>
> router eigrp 1
> network x.x.x.x
> variance 2
>
> This increases the minimum metric to 40 (2 * 20 = 40). EIGRP includes
> all routes that have a metric less than 40 and satisfy the feasibility
> condition.
>
>
> http://www.cisco.com/warp/public/103/19.html#var
>
>
> /SAN
>
>
> On 6/22/05, Jacky Murphy <ccie@maitruongxua.com> wrote:
>> hi all,
>>
>> from source router to destination router have 4 path, configure EIGRP
>> routing
>>
>> path A: MetricA < mixMetric * variance
>> path B: MetricB = mixMetric * variance
>> path C: MetricC < mixMetric * variance
>> path D: MetricD < mixMetric * variance
>>
>> (MetricD = minMetric)
>>
>> in this case, MetricB=MinMetric*variance
>>
>> Question: Router will load balancing 4 paths (A,B,C,D) or 3 paths
>> (A,C,D)?
>> router choise the paths with metric lower than or equal mixMetric *
>> variance?
>>
>> thank group,
>> Jacky
>>
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