From owner-freebsd-questions@FreeBSD.ORG Wed Apr 29 09:37:57 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 232BE106564A for ; Wed, 29 Apr 2009 09:37:57 +0000 (UTC) (envelope-from sebster@sebster.com) Received: from mail.sebster.com (mail.sebster.com [193.46.80.82]) by mx1.freebsd.org (Postfix) with SMTP id 59DDD8FC1E for ; Wed, 29 Apr 2009 09:37:56 +0000 (UTC) (envelope-from sebster@sebster.com) Received: (qmail 17888 invoked from network); 29 Apr 2009 09:37:55 -0000 Received: from unknown (HELO ?10.0.1.6?) (sebster@85.147.225.232) by 10.0.98.3 with SMTP; 29 Apr 2009 09:37:55 -0000 Message-ID: <49F81FF2.3040302@sebster.com> Date: Wed, 29 Apr 2009 11:37:54 +0200 From: Sebastiaan van Erk User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="------------ms060805010009060603010209" Subject: CARP & bridge X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Apr 2009 09:37:57 -0000 This is a cryptographically signed message in MIME format. --------------ms060805010009060603010209 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi, I have a bridged OpenVPN setup where the OpenVPN tap0 driver is bridged (via bridge0) to the physical em1 interface, which has a VIP via a carp1 interface: em1: flags=8943 metric 0 mtu 1500 options=98 ether 00:0c:29:61:2a:55 inet 10.0.80.77 netmask 0xffffff00 broadcast 10.0.80.255 media: Ethernet autoselect (1000baseTX ) status: active bridge0: flags=8843 metric 0 mtu 1500 ether 9a:6a:9f:b2:65:da id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp maxaddr 100 timeout 1200 root id 00:00:00:00:00:00 priority 32768 ifcost 0 port 0 member: tap0 flags=143 ifmaxaddr 0 port 11 priority 128 path cost 2000000 member: em1 flags=143 ifmaxaddr 0 port 2 priority 128 path cost 20000 tap0: flags=8943 metric 0 mtu 1500 ether 00:bd:48:03:00:00 Opened by PID 24616 carp1: flags=49 metric 0 mtu 1500 inet 10.0.80.74 netmask 0xffffff00 carp: MASTER vhid 2 advbase 1 advskew 0 The problem I have is that when I ping the VIP from a VPN client (on tap0), the server receives arp requests for the VIP on tap0, but it does not respond to them: # tcpdump -i tap0 -ln 11:29:13.637048 arp who-has 10.0.80.74 tell 10.0.80.6 Is there any way to get the server to respond to arp requests on tap0 for the VIP? This is all on FreeBSD 7.1 with OpenVPN 2.0.6 (both client and server). 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