From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pasi =?iso-8859-1?Q?K=E4rkk=E4inen?= Subject: Re: Attempting to checksum a non-TCP/UDP packet errors rolling across screen Date: Wed, 21 Apr 2010 19:07:14 +0300 Message-ID: <20100421160714.GF1878@reaktio.net> References: <20100410111939.GF1878@reaktio.net> <20100412062101.GO1878@reaktio.net> <4BCF1CAF.5080104@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <4BCF1CAF.5080104@verizon.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-users-bounces@lists.xensource.com Errors-To: xen-users-bounces@lists.xensource.com To: Gerry Reno Cc: xen-devel@lists.xensource.com, xen-users@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Wed, Apr 21, 2010 at 11:41:35AM -0400, Gerry Reno wrote: > Pasi K=E4rkk=E4inen wrote: >> On Sat, Apr 10, 2010 at 02:19:39PM +0300, Pasi K=E4rkk=E4inen wrote: >> =20 >>> On Fri, Apr 09, 2010 at 06:40:04PM -0700, Brandon Lamb wrote: >>> =20 >>>> Hello, >>>> >>>> Just did a fresh install of xen-4.0 and using the 2.6.31.13 dom0 ker= nel. >>>> >>>> I have 6 linux debian guests running, and on my host console i am >>>> getting these errors rolling pretty constantly. >>>> >>>> "Attempting to checksum a non-TCP/UDP packet, dropping a protocol 1 = packet" >>>> >>>> I tried doing the ethtool -K eth0 tx off and same thing on peth0, >>>> using bridged mode for network config. >>>> >>>> Any tips? Google is failing me, im not sure what to even search for >>>> other than "xen Attempting to checksum a non-TCP/UDP packet". >>>> >>>> Im wondering if this has something to do with why my guests were >>>> seeming to have network timeout/freezing problems, I thought maybe >>>> upgrading from 3.4 to 4.0 would magically solve it. >>>> >>>> =20 >>> All the networking stuff is done on the dom0 Linux kernel, >>> so Xen upgrade doesn't affect that. >>> >>> Although most probably you also upgraded dom0 kernel.. >>> >>> Can you please post output of: >>> >>> - ethtool peth0 >>> - ethtool -i peth0 >>> - brctl show >>> - ifconfig -a >>> >>> =20 >> >> And also: >> - ethtool -k peth0 >> >> -- Pasi >> =20 > > Hi Pasi, > I saw this post and I'm experiencing this checksumming problem as well= . =20 > The setup is eucalyptus and whenever we try to ping an 'instance' =20 > machine from outside the cloud controller we see these errors. Also =20 > when we try to ping from inside the instance to the public network. We= =20 > are running in NOVLAN mode across a bridge. > > Here are some details: stats from the 'node controller' (which launche= s =20 > the instances) > > root@grp-01-23-02:~# ethtool eth0 > Settings for eth0: > Supported ports: [ TP MII ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Half 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Half 1000baseT/Full > Advertised auto-negotiation: Yes > Speed: 1000Mb/s > Duplex: Full > Port: MII > PHYAD: 0 > Transceiver: internal > Auto-negotiation: on > Supports Wake-on: pumbg > Wake-on: g > Current message level: 0x00000033 (51) > Link detected: yes > root@grp-01-23-02:~# > root@grp-01-23-02:~# > root@grp-01-23-02:~# ethtool -i eth0 > driver: r8169 > version: 2.3LK-NAPI > firmware-version: > bus-info: 0000:02:00.0 > Ok, so Realtek NIC. > root@grp-01-23-02:~# > root@grp-01-23-02:~# > root@grp-01-23-02:~# which brctl > /usr/sbin/brctl > You have new mail in /var/mail/root > root@grp-01-23-02:~# > root@grp-01-23-02:~# brctl show > bridge name bridge id STP enabled interfaces > br0 8000.00241d1905df no eth0 > vif3.0 > vif4.0 > tmpbridge 8000.000000000000 no > virbr0 8000.000000000000 yes > root@grp-01-23-02:~# > root@grp-01-23-02:~# ethtool -k eth0 > Offload parameters for eth0: > Cannot get device flags: Operation not supported > rx-checksumming: on > Did you try disabling rx-checksumming?=20 > tx-checksumming: off > scatter-gather: off > tcp-segmentation-offload: off > udp-fragmentation-offload: off > generic-segmentation-offload: off > generic-receive-offload: off > large-receive-offload: off > > We are running ubuntu enterprise cloud 1.6 with a pv_ops dom0 kernel =20 > (2.6.31.6) compiled from Jeremy's git tree back about December. > Ok. Did you try upgrading the dom0 kernel?=20 -- Pasi