From owner-freebsd-xen@freebsd.org Tue May 3 07:25:02 2016 Return-Path: Delivered-To: freebsd-xen@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 6F989B2BCC4 for ; Tue, 3 May 2016 07:25:02 +0000 (UTC) (envelope-from prvs=924d4b44a=roger.pau@citrix.com) Received: from SMTP.CITRIX.COM (smtp.citrix.com [66.165.176.89]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "mail.citrix.com", Issuer "Verizon Public SureServer CA G14-SHA2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 30F041A8F for ; Tue, 3 May 2016 07:25:01 +0000 (UTC) (envelope-from prvs=924d4b44a=roger.pau@citrix.com) X-IronPort-AV: E=Sophos;i="5.24,571,1454976000"; d="scan'208";a="351304968" Date: Tue, 3 May 2016 09:24:49 +0200 From: Roger Pau =?iso-8859-1?Q?Monn=E9?= To: Stephen Jones CC: "'freebsd-xen@freebsd.org'" Subject: Re: xn ethernet issues as DOMU under NetBSD DOM0 Message-ID: <20160503072441.qgqgaw52sijybg4a@mac> References: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.6.0-neo (2016-04-07) X-DLP: MIA1 X-BeenThere: freebsd-xen@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Discussion of the freebsd port to xen - implementation and usage List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 May 2016 07:25:02 -0000 On Mon, May 02, 2016 at 07:16:16PM +0000, Stephen Jones wrote: > Hello, I'm seeing a problem with networking running under FreeBSD 10.3 as a XEN DOMU (HVM) on a NetBSD 7 XEN DOM0 (XEN45). > In searching the list archives, I did see mentions of there being an issue with scatter/gather with symptoms affecting > ssh connections in/out going and likely other network issues. Are there sysctl parameters or other settings that could get > around this issue? > > The ssh symptom (as reported by others) looks like this: > > debug1: Local version string SSH-2.0-OpenSSH_6.8 NetBSD_Secure_Shell-20150403 > debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 FreeBSD-20160310 > debug1: match: OpenSSH_7.2 FreeBSD-20160310 pat OpenSSH* compat 0x04000000 > debug1: Remote is NON-HPN aware > debug1: mac 0x0, -1 -1 > debug1: SSH2_MSG_KEXINIT sent > Bad packet length 168430090. > debug1: mac 0x0, -1 -1 > ssh_dispatch_run_fatal: message authentication code incorrect Can you try with a HEAD snapshot? netfront has been recently reworked [0], so there's a chance it is already fixed there. Roger. [0] https://svnweb.freebsd.org/base?view=revision&revision=294442