From owner-freebsd-net@freebsd.org Wed Nov 4 07:55:01 2015 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 4D9F6A26A00 for ; Wed, 4 Nov 2015 07:55:01 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) Received: from relay2.tomsk.ru (mail.sibptus.tomsk.ru [212.73.124.5]) by mx1.freebsd.org (Postfix) with ESMTP id AF2851592 for ; Wed, 4 Nov 2015 07:54:59 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) X-Virus-Scanned: by clamd daemon 0.98.5_1 for FreeBSD at relay2.tomsk.ru Received: from admin.sibptus.TOMSK.ru ([212.73.125.240] verified) by relay2.tomsk.ru (CommuniGate Pro SMTP 5.1.16) with ESMTPS id 38943796 for freebsd-net@freebsd.org; Wed, 04 Nov 2015 13:54:56 +0600 Received: from admin.sibptus.TOMSK.ru (sudakov@localhost [127.0.0.1]) by admin.sibptus.TOMSK.ru (8.14.9/8.14.7) with ESMTP id tA47ss1U000709 for ; Wed, 4 Nov 2015 13:54:56 +0600 (NOVT) (envelope-from vas@mpeks.tomsk.su) Received: (from sudakov@localhost) by admin.sibptus.TOMSK.ru (8.14.9/8.14.7/Submit) id tA47ssVu000708 for freebsd-net@freebsd.org; Wed, 4 Nov 2015 13:54:54 +0600 (NOVT) (envelope-from vas@mpeks.tomsk.su) X-Authentication-Warning: admin.sibptus.TOMSK.ru: sudakov set sender to vas@mpeks.tomsk.su using -f Date: Wed, 4 Nov 2015 13:54:54 +0600 From: Victor Sudakov To: freebsd-net@freebsd.org Subject: tap(4) and host-only networking between host and guest Message-ID: <20151104075454.GA99850@admin.sibptus.tomsk.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: OAO "Svyaztransneft", SibPTUS X-PGP-Key: http://www.dreamwidth.org/pubkey?user=victor_sudakov X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 User-Agent: Mutt/1.5.24 (2015-08-30) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Nov 2015 07:55:01 -0000 Colleagues, I am experimenting with bhyve which uses tap(4) for network access. I don't want to bridge tap0 with any of the hosts's real NICs. How can I create a private network just between the host and the guest? I even tried to create a lo1 interface on the host and bridge it with tap0 but lo1 would not add as a bridge member even if I adjust its MTU. root@vas:/etc # ifconfig bridge0 create root@vas:/etc # ifconfig lo1 mtu 1500 up root@vas:/etc # ifconfig bridge0 addm tap0 root@vas:/etc # ifconfig bridge0 addm lo1 ifconfig: BRDGADD lo1: Invalid argument root@vas:/etc # root@vas:/etc # ifconfig bridge0 bridge0: flags=8802 metric 0 mtu 1500 ether 02:8f:fd:16:50:00 nd6 options=9 id 00:00:00:00:00:00 priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp maxaddr 2000 timeout 1200 root id 00:00:00:00:00:00 priority 0 ifcost 0 port 0 member: tap0 flags=143 ifmaxaddr 0 port 5 priority 128 path cost 2000000 root@vas:/etc # Any help is appreciated. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru