From: Tim Fletcher (groupstudy@fletchmail.net)
Date: Thu Jul 08 2004 - 00:01:09 GMT-3
At 08:33 PM 7/6/2004, ccie2be wrote:
>OK, guys. You're not getting it, so I'll give you a hint.
>
>The problem is that from R3's point of view, the 2 paths to R1 are equal
>cost. This is because when Eigrp figures out the cost to a destination, it
>using the lowest bandwidth link anywhere along the path to the destination.
>Since the path to R1's lo0 includes a single 64k link between R2 and R1,
>from R3's point of view both paths to R1 are equal.
That's not entirely true. EIGRP does use the lowest bandwidth link in the path, but it also uses the cumulative delay. So you will see a larger difference in the metrics to reach R2 than the metrics to reach R1.
From R3's perspective, the two paths to R2 are going to have different bandwidth and delay values, but the two paths to R1 are only going to have a difference in the delay value. The difference will also be smaller because both paths will include the 64K link which will have a higher delay than either of the other links. So you should see a difference in the metrics to R1, but it will be much smaller.
>That, unfortunately, is as much as I know. What I don't know is how to
>overcome this problem such that R3 unequal load balances traffic to R1 just
>llike it does with traffic to R2.
How about changing the EIGRP k values to achieve what you're after. One possibility is to set them to only use delay, then set the delay very low on the 64K link from R2 to R1. This should give you pretty close to the same distribution.
>----- Original Message -----
>From: "Sergio Jimenez Arguedas" <sejimenez@its.co.cr>
>To: <ccielab@groupstudy.com>
>Sent: Thursday, July 22, 2004 8:14 PM
>Subject: RV: Eigrp unequal load balancing problem
>
>
>> Hi,
>>
>> I think traffic shara balanced is the option!!!
>>
>>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr
>> rp_r/1rfeigrp.htm#wp1024898
>>
>>
>> Rgds,
>>
>>
>> Sergio
>>
>>
>> -----Mensaje original-----
>> De: nobody@groupstudy.com [mailto:nobody@groupstudy.com]En nombre de
>> ccie2be
>> Enviado el: martes, 06 de julio de 2004 17:44
>> Para: tycampbell@comcast.net; Group Study
>> Asunto: Re: Eigrp unequal load balancing problem
>>
>>
>> Nope, not the answer.
>>
>> Variance is already configured and unequal load balancing already works
>> between R2 and R3.
>>
>> The problem is that while unequal load balancing works between R2 & R3,
>> unequal load balancing *doesn't* work between
>>
>> R1 and R3.
>>
>> Why?
>>
>> And, what is the solution?
>>
>>
>> ----- Original Message -----
>> From: <tycampbell@comcast.net>
>> To: "ccie2be" <ccie2be@nyc.rr.com>; "Group Study" <ccielab@groupstudy.com>
>> Sent: Tuesday, July 06, 2004 7:06 PM
>> Subject: Re: Eigrp unequal load balancing problem
>>
>>
>> > I think variance may be the answer you are looking for
>> >
>> > variance of 2 should do it for this scenario
>> >
>> >
>> > > Hi guys,
>> > >
>> > > Here's the scenario:
>> > >
>> > >
>> > > 2 mbps
>> > > R1 -----64k ----- R2 ========= R3
>> > > 1 mbps
>> > >
>> > >
>> > > All routers are running Eigrp. R2 and R3 have unequal load balancing
>> > > configured.
>> > >
>> > > Traffic between R2's lo0 and R3's lo0 unequal load balances perfectly.
>> > > However, traffic between R1's lo0 and R3's lo0 don't
>> > > unequal load balance. In this case, traffic is balanced equally across
>> the 2
>> > > links between R2 and R3.
>> > >
>> > > What the best way to have twice as much traffic going over the 2 mbps
>> link
>> > > from R3 to R2 as the 1 mbps link between those 2 routers?
>> > >
>> > >
>> > > TIA, Tim
>> > >
>> > >
>_______________________________________________________________________
>> > > Please help support GroupStudy by purchasing your study materials
>from:
>> > > http://shop.groupstudy.com
>> > >
>> > > Subscription information may be found at:
>> > > http://www.groupstudy.com/list/CCIELab.html
>>
>> _______________________________________________________________________
>> Please help support GroupStudy by purchasing your study materials from:
>> http://shop.groupstudy.com
>>
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>> _______________________________________________________________________
>> Please help support GroupStudy by purchasing your study materials from:
>> http://shop.groupstudy.com
>>
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>_______________________________________________________________________
>Please help support GroupStudy by purchasing your study materials from:
>http://shop.groupstudy.com
>
>Subscription information may be found at:
>http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Aug 01 2004 - 10:11:49 GMT-3