RE: IPv6 ULA

[Pekka Savola <pekkas@xxxxxxxxxx>]

On Fri, 12 Nov 2004, Bob Hinden wrote:
> > So, are you requiring that BGP will have to have a configuration knob to to 
> > special-case fc00::/7? (This cannot be done using the typical 
> > route-map/policy statements, because it has to be on by default and not 
> > interfere with the operators configuring their own policy.)
>
> Not exactly.  The intent is to suggest that border routers be 
> configured to do this.  We are not requiring knobs or special case 
> code for this.

This is slightly different than what Tony is proposing, but let me 
state the problems I see with both:

 1) operator configuration: many operators probably won't do that 
unless they have set up filters (many have, from 6bone times) to weed 
out unexpected prefixes.

 2) vendor code: the only way to implement this in the sane manner 
would be having a 'allow-ula' -like knob for BGP.  You cannot 
configure this in the policies, because either a) the operator forgets 
about ULAs when writing the policy, or b) the policy does not exist 
and it isn't applied.

So both would appear to have their problems, but 1) might be slightly 
better, especially if GROW WG would produce a BCP or some other 
document giving guidance on filtering.

--
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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