[ppml] Various IPv6 issues

Per Heldal heldal at eml.cc
Fri Aug 24 05:35:17 EDT 2007

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 needed.

It also leaves a gap that vendors possibly could fill with minor changes
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

> 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


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