From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Baptiste Favre Subject: Re: PCI passthrough issue Date: Wed, 12 Jan 2011 21:07:30 +0100 Message-ID: <4D2E0A02.2020606@jbfavre.org> References: <4D2DCB09.5010703@jbfavre.org> <20110112154344.GA28780@dumpdata.com> <4D2DCE8F.3060504@jbfavre.org> <20110112163647.GB10863@dumpdata.com> <4D2DDD4D.9090503@jbfavre.org> <20110112172620.GB11522@dumpdata.com> <4D2DE889.4040604@jbfavre.org> <20110112183242.GA23125@dumpdata.com> Reply-To: xen-devel@lists.xensource.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20110112183242.GA23125@dumpdata.com> 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 Le 12/01/2011 19:32, Konrad Rzeszutek Wilk a =E9crit : >> >> Finally, I think that my setup shall not be responsible for the fact >> that ping works, small DNS answers are received but not bigger ones >=20 > Aah, somehow I missed that fact. Seems yes :) >> (limit seems to be around 100 bytes). >=20 > What does wireshark or tcpdump tell you when you send the larger packet= s? That's one of my problem: nothing special :( I can only run tcpdump on my gateway (no SSH available on my OpenWRT domU and only xm console access is available). I see DNS requests comming in, I see DNS answers going out. ARP requests are fine. As an example: dig free.fr works dig jbfavre.org works dig amazon.fr works dig amazon.com works (quite long, but works) dig google.fr fails dig google.com fails >>From another machine in the same LAN, all requests work fine. Thought this was due to some ARP restriction setted up by default in OpenWRT, but in this case, I can not explain why some DNS lookup do work and some don't.