From owner-freebsd-net@FreeBSD.ORG Thu Mar 19 02:20:45 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 800608E7 for ; Thu, 19 Mar 2015 02:20:45 +0000 (UTC) Received: from mail-pd0-f179.google.com (mail-pd0-f179.google.com [209.85.192.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 54196164 for ; Thu, 19 Mar 2015 02:20:44 +0000 (UTC) Received: by pdbop1 with SMTP id op1so60913423pdb.2 for ; Wed, 18 Mar 2015 19:20:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :subject:content-type:content-transfer-encoding; bh=4XvaHy05KakiBA34tN4UW5sI1PaCynJ2zOT8y6qfqro=; b=Y15K979xpn7MvTO0DdUbaOyiriR+abwikOyi1jW5qbBTJoY377lowo02xranydQF2j JA8CItGydtncFozsc+8IQMsK3VXR7PAM+oOxEmKJxcdIYc3fzihkQC8SQo6j81Ke9Y4+ +RG4MxVqYjgHPNjAlNSQ812ARwx1rtNadb72Auy3VA/5BzxmfM2XG0iHrG170v0yhChI yTazZd0Vcwue3LpPZHBgrv9xO5WXyzTLADyxiI6iDj6mPH3FmQyU8WaDt0QysweT8U96 CR4AD44XgSeCeQHHcOB2Jaf4xycctEnvY8xJogcvfE+mfL5NgxdlDu/1/ADci0ehnR4t 3E8Q== X-Gm-Message-State: ALoCoQlVeRoTvvUBd2orjb93yTKoQa2ksFuppnxt2nNQvuFQxG5H0BtN4ksIYZBT9FOTvFh529Cg X-Received: by 10.66.66.196 with SMTP id h4mr167252243pat.127.1426731638244; Wed, 18 Mar 2015 19:20:38 -0700 (PDT) Received: from [128.199.254.70] (sgp.sin.winterei.se. [128.199.254.70]) by mx.google.com with ESMTPSA id mk1sm2078067pdb.71.2015.03.18.19.20.36 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 18 Mar 2015 19:20:37 -0700 (PDT) Message-ID: <550A3271.2040501@winterei.se> Date: Thu, 19 Mar 2015 11:20:33 +0900 From: "Paul S." User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: freebsd-net Subject: Unremovable ARP entry and 'address already in use' Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.18-1 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, 19 Mar 2015 02:20:45 -0000 Hi, Seeing this on 10.1-release p5. FreeBSD ipfw-0.syd.fqdn.tld 10.1-RELEASE-p5 FreeBSD 10.1-RELEASE-p5 #0 r278455: Mon Feb 9 07:18:21 UTC 2015 root@ipfw-0.syd.fqdn.tld:/usr/obj/usr/src/sys/qfkern amd64 Basically, I have a static arp entry that I cannot remove. This in itself is not a problem. Problem is, when trying to assign that IP address to the same interface, it says the 'address is in use' (which it is not) ? (110.62..211.87) at 00:12:c0:88:03:8f on ix1 permanent [ethernet] Attempting to remove the entry produces an invalid argument error. root@ipfw-0:~ # arp -d 110.62..211.87 arp: writing to routing socket: Invalid argument ix1 does not have this IP configured anymore either. ix1: flags=8843 metric 0 mtu 1500 description: FW Upstream 0 options=8400bb ether 00:12:c0:88:03:8f inet6 fe80::212:c0ff:fe88:38f%ix1 prefixlen 64 scopeid 0x2 nd6 options=21 media: Ethernet autoselect (10Gbase-LR ) status: active When I try to assign it back to ix1, I get this root@ipfw-0:~ # ifconfig ix1 inet 110.62..211.87 netmask 255.255.254.0 ifconfig: ioctl (SIOCAIFADDR): Address already in use I've verified with the provider that there isn't an arp entry at present for this IP address, so the issue seems local to freebsd. Anyone ever see anything like this? I'm aware rebooting will fix it, but this is a live firewall and I'd rather not do that.