Re: Internet Traffic load balancing

I found Ivan Pepelnjak's blog post from 2007 talking about this exact solution:

http://blog.ioshints.info/2007/02/unequal-load-split-with-static-routes.html

I highly respect Brian and Ivan, but in this case I'm not really
convinced. IOS is telling me otherwise and I'm stubborn not to believe
it ;-)

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Marko Milivojevic - CCIE #18427
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On Mon, May 2, 2011 at 16:40, Marko Milivojevic <markom_at_ipexpert.com> wrote:
> I don't follow every topic on GS in detail, but as I said - I haven't
> tested this.
>
> Do you have a link to a document where this is detailed?
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> FREE CCIE training: http://bit.ly/vLecture
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> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
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>
> On Mon, May 2, 2011 at 16:32, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
>> AFAIK, it's been documented that it works as Brian says, i.e., 5:2 relation,
>> or even 7:3 if need be.
>> This same topic has been here some 2 or 3 months ago ?
>> -Carlos
>>
>> Marko Milivojevic @ 02/05/2011 20:06 -0300 dixit:
>>>
>>> To make my argument further:
>>>
>>> R2#sh ip cef 0.0.0.0 0.0.0.0 detail
>>> 0.0.0.0/0, epoch 0, per-destination sharing
>>> B DefNet source: 0.0.0.0/0
>>> B recursive via 169.254.1.1
>>> B  B recursive via 10.0.0.1
>>> B  B  B attached to GigabitEthernet0/0
>>> B recursive via 169.254.1.2
>>> B  B recursive via 10.0.0.1
>>> B  B  B attached to GigabitEthernet0/0
>>> B recursive via 169.254.1.3
>>> B  B recursive via 10.0.0.1
>>> B  B  B attached to GigabitEthernet0/0
>>> B recursive via 169.254.1.4
>>> B  B recursive via 10.0.0.1
>>> B  B  B attached to GigabitEthernet0/0
>>> B recursive via 169.254.1.5
>>> B  B recursive via 10.0.0.1
>>> B  B  B attached to GigabitEthernet0/0
>>> B recursive via 169.254.2.1
>>> B  B recursive via 20.0.0.2
>>> B  B  B attached to GigabitEthernet0/1
>>> B recursive via 169.254.2.2
>>> B  B recursive via 20.0.0.2
>>> B  B  B attached to GigabitEthernet0/1
>>>
>>> As you can see, CEF resolves this in the manner I described.
>>>
>>> --
>>> Marko Milivojevic - CCIE #18427
>>> Senior Technical Instructor - IPexpert
>>>
>>> FREE CCIE training: http://bit.ly/vLecture
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>>> Mailto: markom_at_ipexpert.com
>>> Telephone: +1.810.326.1444
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>>>
>>> On Mon, May 2, 2011 at 15:55, Marko Milivojevic <markom_at_ipexpert.com>
>>> wrote:
>>>>
>>>> On Mon, May 2, 2011 at 15:52, Brian McGahan <bmcgahan_at_ine.com> wrote:
>>>>>
>>>>> Yes each route is equal, but more point to one exit point vs. another.
>>>>> Try it, it works.
>>>>
>>>> Just to make it clear - I'm not arguing. I like the solution, but I'm
>>>> not sure if it's going to solve the problem for the reasons below.
>>>>
>>>> I'm sure they will show in the routing table as 7 different routes.
>>>> However, when CEF resolves adjacencies, there will still be only two
>>>> exits. While we may have the impression that we have 5:2 ratio by
>>>> looking into the RIB, are we _actually_ going to have it with the
>>>> traffic.
>>>>
>>>> Without generating the traffic and measuring the output, I'm not quite
>>>> sure how to test this...
>>>>
>>>> --
>>>> Marko Milivojevic - CCIE #18427
>>>> Senior Technical Instructor - IPexpert
>>>>
>>>> FREE CCIE training: http://bit.ly/vLecture
>>>>
>>>> Mailto: markom_at_ipexpert.com
>>>> Telephone: +1.810.326.1444
>>>> Web: http://www.ipexpert.com/
>>>
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>>
>> --
>> Carlos G Mendioroz B <tron_at_huapi.ba.ar> B LW7 EQI B Argentina
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