Re: Internet Traffic load balancing

From: Marko Milivojevic <markom_at_ipexpert.com>
Date: Mon, 2 May 2011 16:06:30 -0700

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
  DefNet source: 0.0.0.0/0
  recursive via 169.254.1.1
    recursive via 10.0.0.1
      attached to GigabitEthernet0/0
  recursive via 169.254.1.2
    recursive via 10.0.0.1
      attached to GigabitEthernet0/0
  recursive via 169.254.1.3
    recursive via 10.0.0.1
      attached to GigabitEthernet0/0
  recursive via 169.254.1.4
    recursive via 10.0.0.1
      attached to GigabitEthernet0/0
  recursive via 169.254.1.5
    recursive via 10.0.0.1
      attached to GigabitEthernet0/0
  recursive via 169.254.2.1
    recursive via 20.0.0.2
      attached to GigabitEthernet0/1
  recursive via 169.254.2.2
    recursive via 20.0.0.2
      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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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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Received on Mon May 02 2011 - 16:06:30 ART

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