From owner-freebsd-net@FreeBSD.ORG Thu May 24 06:55:41 2012 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BAE2F10656AB for ; Thu, 24 May 2012 06:55:41 +0000 (UTC) (envelope-from luigi@onelab2.iet.unipi.it) Received: from onelab2.iet.unipi.it (onelab2.iet.unipi.it [131.114.59.238]) by mx1.freebsd.org (Postfix) with ESMTP id 7A8648FC08 for ; Thu, 24 May 2012 06:55:41 +0000 (UTC) Received: by onelab2.iet.unipi.it (Postfix, from userid 275) id BE3CC7300A; Thu, 24 May 2012 09:16:05 +0200 (CEST) Date: Thu, 24 May 2012 09:16:05 +0200 From: Luigi Rizzo To: net@freebsd.org Message-ID: <20120524071605.GB50710@onelab2.iet.unipi.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.2.3i Cc: Subject: Any deployment with very many small (/28 .. /32) subnets ? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 May 2012 06:55:41 -0000 Also related to my previous question on lookups, I believe some ISPs may have a huge number of very small subnets (say /28 or even smaller) attached to some kind of virtual interfaces (vlans, gif, tun,...). Can anyone comment on what the numbers are (i.e. 100-1k-10k subnets ?) and whether the subnets are taken from a single larger pool which only includes such subnets, or they are randomly scattered across a large number of /24 subnets ? thanks luigi