[address-policy-wg] Policies interact

On Thu, 7 Apr 2005 06:10:55 -1000, Randy Bush wrote:
>nope.  folk are using /126s internally, and have igp or ibgp carrying
>those prefixes.  of course, they also have the classic loopbacks for
>bgp, which can be /128s.  real hardware vendors know this and don't
>make the same mistakes as were made in the old a/b/c days.
TCAM IC's typically process 72 address lines per cycle,
which means 64 bit for the address plus 8 bit policy etc.

Even if the hardware permits it, I don't think it is a good idea
to put /65 and more specific prefixes into the IGP.
This has nothing to do with a/b/c mistakes, you would just
throw away a possible optimization path for no additional
gain at all.

There is a good chance some day (in the next 50 years)
these additional 8 bytes will have a better use than the current
"we already know where you are" adresses.

Best Regards
Oliver



Oliver Bartels F+E + Bartels System GmbH + 85435 Erding, Germany
oliver at bartels.de + http://www.bartels.de + Tel. +49-8122-9729-0