On Mar 27, 2014, at 2:24 PM, Christopher Morrow <[email protected]> 
wrote:

> On Thu, Mar 27, 2014 at 11:22 AM, joel jaeggli <[email protected]> wrote:
>> I think when were were discussing this in the w.g. that it has the
>> potential to make things such as recursive next-hop calculation much
> 
> yup, certainly... you probably have to think long and hard about any
> standard advice from vendors/third-parties about configuration
> optimizations ;(
> 
>> harder since using link-local-scope addresses that aren't on-link for
>> you would seem problematic. maybe using the loopback is an acceptable
>> alterntive for some applications but you loose access to some tools this way
> 
> see my comment about complexity... oh, included below, how nice of you :)
> 
>>> complexity is going to cause you pain, it is going to cause you
>>> problems and it is going to lengthen outages :( avoid complexity.

I think this is the critical element, many things here will cause pain.

Using link-local for these purposes has so many unintended side-effects
it's not something anyone rational will deploy.  Just because I can stick
a pencil in my eye doesn't mean it's a good idea nor something I should
write a how-to document for.  I have a redundant eye, but at some point
the consequences are likely to be quite catastrophic.

- Jared
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