From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jean Baptiste Favre Subject: Re: PCI passthrough issue Date: Wed, 12 Jan 2011 22:46:49 +0100 Message-ID: <4D2E2149.1010002@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> <4D2E0A02.2020606@jbfavre.org> <20110112214034.GA5833@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: <20110112214034.GA5833@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 22:40, Konrad Rzeszutek Wilk a =E9crit : > On Wed, Jan 12, 2011 at 09:07:30PM +0100, Jean Baptiste Favre wrote: >> 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 >>> >>> Aah, somehow I missed that fact. >> >> Seems yes :) >> >>>> (limit seems to be around 100 bytes). >>> >>> What does wireshark or tcpdump tell you when you send the larger pack= ets? >> >> 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). >=20 > You can install (or just compile it statically) tcpdump on your OpenWRT= , > or just hook it up to a beffier guest.. tcpdump is available on my OpenWRT domU, but I can not perform tcpdump and DNS lookup with only console access and AFAIK screen is not available on OpenWRT >> 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 >=20 > Fails as in response or fails halfway? Fails as in: # dig google.com ; <<>> DiG 9.7.2-P3 <<>> google.com ;; global options: +cmd ;; connection timed out; no servers could be reached >> >> >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 wo= rk >> and some don't.