Received: from mx.ams1.isc.org (mx.ams1.isc.org [199.6.1.65]) by bugs.isc.org (Postfix) with ESMTP id 9694820EE2C6 for ; Fri, 8 Jun 2012 04:00:51 +0000 (UTC) Received: from mail.zytor.com (terminus.zytor.com [IPv6:2001:1868:205::10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx.ams1.isc.org (Postfix) with ESMTPS id ED0855F9891 for ; Fri, 8 Jun 2012 04:00:34 +0000 (UTC) (envelope-from hpa@zytor.com) Received: from titan.hos.anvin.org (c-67-188-81-177.hsd1.ca.comcast.net [67.188.81.177]) (authenticated bits=0) by mail.zytor.com (8.14.5/8.14.5) with ESMTP id q5840WDH007300 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Thu, 7 Jun 2012 21:00:33 -0700 Delivered-To: dhcp-suggest@bugs.isc.org Subject: Request: support for more than one IA_PD prefix; prefix length hints MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,T_RP_MATCHES_RCVD autolearn=ham version=3.3.1 Return-Path: X-Original-To: dhcp-suggest@bugs.isc.org Date: Thu, 07 Jun 2012 21:00:32 -0700 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mx.ams1.isc.org content-type: text/plain; charset="utf-8" Message-ID: <4FD178E0.8020603@zytor.com> To: dhcp-suggest@isc.org Content-Transfer-Encoding: 7bit X-Enigmail-Version: 1.4.1 From: "H. Peter Anvin" X-RT-Original-Encoding: ISO-8859-1 Content-Length: 396 It would be very nice to add support in dhclient for: a. requesting more than one IA_PD prefix; a router may want to request one for each downstream interface (as it seems consumer ISPs at least are planning to hand out /64's); b. sending a prefix length hint (an IA_PREFIX option with a prefix length but all other information zero) to the server to hint at the prefix length desired. -hpa