[ppml] Various IPv6 issues
mack at exchange.alphared.com
Fri Aug 24 07:48:28 EDT 2007
Thank you for your response.
> -----Original Message-----
> From: Per Heldal [mailto:heldal at eml.cc]
> Sent: Friday, August 24, 2007 4:35 AM
> To: mack
> Cc: ppml at arin.net
> Subject: Re: [ppml] Various IPv6 issues
> On Thu, 2007-08-23 at 22:09 -0500, mack wrote:
> > 4) ARIN seems to be allocating on /29 boundaries to allow expansion
> while maintaining aggregation.
> > This is a good thing. Obviously gaps can be filled in later if
> It also leaves a gap that vendors possibly could fill with minor
> to filter specs. I.e. permit up to /N but require the last few bits to
> be 0. This to prevent hijacking of unused blocks from sparse
TCAM masks allow this (at least in Cisco equipment).
> > 5) Geographically dispersed organizations will need more than a
> single /32 if a /32 is the
> > smallest announcement and we do not wish to de-aggregate. Traffic
> engineering is also
> > going to require either A) a new routing protocol, B) changes to BGP,
> C) deaggregation
> > or D) multiple /32s.
> There's still a lot that could be done within current standards by
> implementing dynamic mechanisms that take the as-path-length into
We can limit the distance a de-aggregate travels certainly but it is still
a de-aggregate. At 2 as-hops it has still effected most of the backbones and
major ISPs of the DFZ. At 3 as-hops it effects more than half of all ASes.
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