[dns-operations] CPE router/gateway DNS behavior

[Patrik Wallstrom]

On Tue, 15 Dec 2015, Roosenraad, Chris wrote:

> All,
> 
> Before I start in, and possibly re-invent the wheel, I’m curious if anyone has ever done any analysis of how major brand home routers (i.e. CPEs) behave with regards to the DNS servers their given via DHCP.  Specifically, I’m curious how they choose between the various DNS servers they’re supplied…do they stick with one, do they round robin, is it random, etc.
> 
> So if anyone has done such research, I’d love to know about it.  If not, and anyone wants to help me do such so that we can share it out here, please let me know.

Hi Chris,

A very long time ago, two papers was published:
February 2008: http://iis.se/docs/Routertester_en.pdf
September 2008:
https://www.icann.org/en/system/files/files/sac-035-en.pdf

I don't know of any more recent efforts though.