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Re: QWest is having some pretty nice DNS issues right now
From: Daniel Golding <dgolding () burtongroup com>
Date: Sat, 07 Jan 2006 18:02:36 -0500


On 1/6/06 9:54 PM, "Steve Gibbard" <scg () gibbard org> wrote:


On Fri, 6 Jan 2006, william(at)elan.net wrote:

On Fri, 6 Jan 2006, Wil Schultz wrote:

Apparently they have lost two authoritative servers. ETA is unknown.

You forgot to mention that they only have two authoritative servers for
most of their domains...

[snip]

So from my uninformed vantage point, it looks like they started doing this
more or less right -- two servers or clusters of servers in two different
facilities, a few thousand miles apart on different power grids and not
subject to the same natural disasters.  In other words, they did the hard
part.  What they didn't do is put them in different BGP routes, which for
a network with as much IP space as Qwest has would seem fairly easy.
While it's tempting to make fun of Qwest here, variations on this theme --
working hard on one area of design while ignoring another that's also
critical -- are really common.  It's something we all need to be careful
of.

Or, not having seen what happened here, the problem could have been
something completely different, perhaps even having nothing to do with
routing or network topology.  In that case, my general point would remain
the same, but this would be a bad example to use.

-Steve

At some point in a carrier's growth, Anycast DNS has got to become a best
practice. Are there many major carriers that don't do it today, or am I just
a starry-eyed idealist?

- Dan


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