Re: v6 subnet size for DSL & leased line customers

[Joe Abley <jabley () ca afilias info>]

On 2-Jan-2008, at 10:21, Iljitsch van Beijnum wrote:

> On 2 jan 2008, at 6:42, Christopher Morrow wrote:
>
> > out of curiousity how is this sort of thing supposed to be done in  
> > v6?
> > (traffic engineering given the '1 prefix per ISP' standard mantra)
>
> AS path prepending, local preference, that kind of thing...

Common practice with IPv4 seems to suggest that those knobs aren't  
sufficient in real life; people still find it necessary to carve up  
their aggregates and announce more-specifics in strategic directions.  
I would suggest that not *all* observed instances of such  
deaggregation are due to operator ignorance :-)

I imagine that the same practice will continue (is continuing?) with  
IPv6, to the extent that peoples' bogon filters allow it to have any  
practical effect.


Joe