Domain name based multihome routing?

Darcy Kevin (FCA) kevin.darcy at
Thu Jun 28 22:04:36 UTC 2018

Yeah, but it's not an exact science, any way you slice it.

I just did a quick crunch of yesterday's data from our web proxy logs, and accesses of URIs based on the FQDN "" (a banner ad site, I believe) had over 570 different combinations of website content categories, depending on URI. One FQDN, 570 different possible ways one might want to direct the traffic. DNS-based approaches simply may not have the granularity necessary to get the job done.

Speaking of web proxies, that should probably be the *first* thing that gets put into place, if the goal is minimize "disfavored" web traffic from traversing expensive WAN connections.

																	- Kevin

-----Original Message-----
From: bind-users <bind-users-bounces at> On Behalf Of Grant Taylor via bind-users
Sent: Wednesday, June 27, 2018 11:04 PM
Cc: bind-users at
Subject: Re: Domain name based multihome routing?

On Jun 27, 2018, at 12:27 PM, Darcy Kevin (FCA) <kevin.darcy at> wrote:
> I’m not convinced DNS has any valuable role to play here.

I can see the value for services that have FQDNs that resolve to IP addresses outside of their ASN(s) like Google / YouTube.

Grant. . . .
unix || die

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