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RE: Minimum prefix length?
From: "Ejay Hire" <ejay.hire () isdn net>
Date: Wed, 11 Jun 2003 14:58:16 -0500

This doesn't seem to be much of a problem with prefixes less than  or equal to /24.  Domestically, Verio is the big 
exception.  They seem to filter anything longer than a /20.
 -----Original Message-----
From: Temkin, David [mailto:temkin () sig com]
Sent: Wednesday, June 11, 2003 2:04 PM
To: nanog () merit edu
Subject: Minimum prefix length?

A few years ago I had an issue with a few of the larger carriers rejecting my routes (from a natural Class B space) 
because their prefix length was too short (at one point I simply had the /16 divided into two /17's and this still got 
rejected in some places).  I can't remember which carriers exactly, but it may have been some larger transit providers 
like AboveNet/etc.

Anyone know what the current attitude is by carriers about this?  Nowadays with ever-growing memory and CPU it doesn't 
seem like it's as much of an issue.  In an environment where we're all trying to conserve address space watching 
natural boundries doesn't seem all that smart.

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