[166180] in North American Network Operators' Group
Re: Policy-based routing is evil? Discuss.
daemon@ATHENA.MIT.EDU (joel jaeggli)
Fri Oct 11 13:44:01 2013
From: joel jaeggli <joelja@bogus.com>
In-Reply-To: <20131011.182700.484727119.wwaites@tardis.ed.ac.uk>
Date: Fri, 11 Oct 2013 10:41:46 -0700
To: William Waites <wwaites@tardis.ed.ac.uk>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
--Apple-Mail=_09D009C7-EB1C-4C47-8D1C-353FB1A90FC5
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii
On Oct 11, 2013, at 10:27 AM, William Waites <wwaites@tardis.ed.ac.uk> =
wrote:
> I'm having a discussion with a small network in a part of the world
> where bandwidth is scarce and multiple DSL lines are often used for
> upstream links. The topic is policy-based routing, which is being
> described as "load balancing" where end-user traffic is assigned to a
> line according to source address.
>=20
> In my opinion the main problems with this are:
>=20
> - It's brittle, when a line fails, traffic doesn't re-route
it's brittle
> - None of the usual debugging tools work properly
> - Adding a new user is complicated because it has to be done in (at
> least) two places
>=20
you take all the useful information that an IGP could be (or is) =
providing you, and then you ignore it and do something else.
> But I'm having a distinct lack of success locating rants and diatribes
> or even well-reasoned articles supporting this opinion.
>=20
> Am I out to lunch?
evil is not a synonym for ugly patch placed over a problem that could be =
handled better. If it's being used as an alternative to VRF, it isn't.
>=20
> -w
> --
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
--Apple-Mail=_09D009C7-EB1C-4C47-8D1C-353FB1A90FC5
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
filename=signature.asc
Content-Type: application/pgp-signature;
name=signature.asc
Content-Description: Message signed with OpenPGP using GPGMail
-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - http://gpgtools.org
iEYEARECAAYFAlJYOFoACgkQ8AA1q7Z/VrKfjACfaYyWNhZCvpQkFiupeCqPpL9t
L+oAn3EdiFWcNCQnBNsswz9mQg9Ul0p2
=y8OW
-----END PGP SIGNATURE-----
--Apple-Mail=_09D009C7-EB1C-4C47-8D1C-353FB1A90FC5--
