From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Garron Subject: Re: Checksumming problem in pv_ops dom0 kernel / netback Date: Tue, 30 Mar 2010 18:58:02 -0400 Message-ID: <4BB281FA.3020906@sce.pridelands.org> References: <20100317123448.GC16370@alpha.trueline.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100317123448.GC16370@alpha.trueline.nl> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org S.H. Verbrugge wrote: > Ever since we switched to a pv_ops dom0 kernel (we were using 2.6.26 > xenkernel from Debian repo before, with Xen 3.2), we started to have > some problems when attempting to route packets on a domU. I'm having the same problem. All TCP packets that are forwarded through a domU are somehow getting a static checksum (0x9e85) just as they're being put out on the wire. ICMP is dropped by the dom0, as you describe, with the "Attempting to checksum a non UDP/TCP packet" message in dmesg. More detail about my situation is in my post to xen-users, here: http://lists.xensource.com/archives/html/xen-users/2010-03/msg00846.html It doesn't include a solution, though. > This is a tg3 interface I'm also running the tg3 ethernet driver, which may be of significance. -- Scott Garron