Re: Policy-based routing is evil? Discuss.

[Michael Hallgren <m.hallgren () free fr>]

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Le 11/10/2013 19:41, joel jaeggli a écrit :
> 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.
> >
> > In my opinion the main problems with this are:
> >
> >  - 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
>
> you take all the useful information that an IGP could be (or is)
providing you, and then you ignore it and do something else.

I like that phrase. ;-)

mh
> > But I'm having a distinct lack of success locating rants and diatribes
> > or even well-reasoned articles supporting this opinion.
> >
> > 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.
> > -w
> > --
> > The University of Edinburgh is a charitable body, registered in
> > Scotland, with registration number SC005336.

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