[166187] in North American Network Operators' Group
Re: Policy-based routing is evil? Discuss.
daemon@ATHENA.MIT.EDU (Christopher Morrow)
Fri Oct 11 14:36:27 2013
In-Reply-To: <20131011.191357.239591912.wwaites@tardis.ed.ac.uk>
Date: Fri, 11 Oct 2013 14:35:21 -0400
From: Christopher Morrow <morrowc.lists@gmail.com>
To: William Waites <wwaites@tardis.ed.ac.uk>
Cc: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Oct 11, 2013 at 2:13 PM, William Waites <wwaites@tardis.ed.ac.uk> wrote:
> On Fri, 11 Oct 2013 10:41:46 -0700, joel jaeggli <joelja@bogus.com> said:
> > evil is not a synonym for ugly patch placed over a problem that
> > could be handled better.
>
> Ok, fair enough. My first experience with PBR was as a summer intern in
> the mid-1990s who inherited management of a large ATM network that had
> a big VPN-esque thing built entirely that way and with no
> documentation. It certainly felt evil at the time. ;)
I think really PBR violates this:
<http://en.wikipedia.org/wiki/Principle_of_least_astonishment>
I see ISP folks MOSTLY avoid PBR, because it does weird things that
NOC/ops folks just plain don't expect. I see Enterprise network folks
fall back to PBR often, for reasons that they seem happy with... but
man it makes things confusing :)
-chris
