From owner-freebsd-questions@FreeBSD.ORG Thu Jul 11 10:19:43 2013 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id D9A2B8D9 for ; Thu, 11 Jul 2013 10:19:43 +0000 (UTC) (envelope-from sam.gh1986@gmail.com) Received: from mail-la0-x235.google.com (mail-la0-x235.google.com [IPv6:2a00:1450:4010:c03::235]) by mx1.freebsd.org (Postfix) with ESMTP id 665061006 for ; Thu, 11 Jul 2013 10:19:43 +0000 (UTC) Received: by mail-la0-f53.google.com with SMTP id fs12so6664421lab.12 for ; Thu, 11 Jul 2013 03:19:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=jf007Aj1wgIj1cdwHdhocMfutCKczIqBpviQ+0CUkDk=; b=yqEGANWBdL1miJmt+zshVkjHClGdEj65PPJRAKsgKtlmnpooKek5ym2DK/6Cat0sBE q8oTMSFioLB10IQAvGtYoM4/0iyVlD1ezKXgN3cR8G+QsuGQY+rEsCARzDwiChPyKd25 xbtP9JBF0Wqh1ddCgxxsz61vsOj2ryztnpW7dfR9qGJETJR0tcoBdBjDcQv/sXNVDXTZ LUhi8qEIa5L5FbmHxj+hObOLQz3COWGmOGRLltjHVK5/WVssEmSZP++bDabAaeq1bnQ/ Sxuiz2tkBLhwAT0oLFhWn7ePl8zPEm0v7uYlztiYaKh5MCzi2ItmQ8UjmlTFm+y/cSVd goDg== MIME-Version: 1.0 X-Received: by 10.152.4.194 with SMTP id m2mr16954530lam.23.1373537982261; Thu, 11 Jul 2013 03:19:42 -0700 (PDT) Received: by 10.112.67.135 with HTTP; Thu, 11 Jul 2013 03:19:42 -0700 (PDT) Date: Thu, 11 Jul 2013 14:49:42 +0430 Message-ID: Subject: prevent ip conflict in dhcp client From: s m To: freebsd-questions Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.14 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Jul 2013 10:19:43 -0000 hello all i have a question about dhcp client. i want to know if there is any way to understand the ip address which is offered by server before it assigned to the interface. i have a freebsd system which one of its interfaces should get ip address from dhcp server whereas other interfaces have ip addresses and their ip address change many times. so i want to prevent ip conflict. is there any way to prevent ip conflict in this situation? i think the best way is to know the ip address which is offered by dhcp server before assigning it to interface and check if it has conflict with others or not. is it possible? if yes, how i can do this? any comments or hints are appreciated. thanks in advance SAM