anycast load balancing issue

Cameron Byrne cb.list6 at gmail.com
Wed Jan 4 08:56:58 CST 2012


On Jan 4, 2012 4:52 AM, "Måns Nilsson" <mansaxel at besserwisser.org> wrote:
>
> Subject: anycast load balancing issue Date: Wed, Jan 04, 2012 at
01:02:55PM +0100 Quoting Måns Nilsson (mansaxel at besserwisser.org):
>
> > Trouble is, we find that (untweaked) cost and metric are such that all
> > nodes are equal.
>
> s/all nodes/all nodes in my pathetically small test case/
>
> Was no issue. I just was unlucky in selecting test cases. Sorry.
>
>
> --
> Måns Nilsson     primary/secondary/besserwisser/machina
> MN-1334-RIPE                             +46 705 989668
> Do you have exactly what I want in a plaid poindexter bar bat??
>
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>

I use:

Anycast = server loop back
Protocol to server = bgp / bfd

This allows for ecmp horizontal scaling for n number of dns servers (where
n is less than Max ecmp paths)

You may need to turn the bgp ecmp multipath knob.


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