WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Re: [Xen-users] Attempting to checksum a non-TCP/UDP pac

To: Gerry Reno <greno@xxxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Xen-users] Attempting to checksum a non-TCP/UDP packet errors rolling across screen
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sat, 22 May 2010 14:36:52 +0300
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Sat, 22 May 2010 04:40:28 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20100421160714.GF1878@xxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <k2rf25c44611004091840h124f162fn1089133410587af4@xxxxxxxxxxxxxx> <20100410111939.GF1878@xxxxxxxxxxx> <20100412062101.GO1878@xxxxxxxxxxx> <4BCF1CAF.5080104@xxxxxxxxxxx> <20100421160714.GF1878@xxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.18 (2008-05-17)
On Wed, Apr 21, 2010 at 07:07:14PM +0300, Pasi Kärkkäinen wrote:
> On Wed, Apr 21, 2010 at 11:41:35AM -0400, Gerry Reno wrote:
> > Pasi Kärkkäinen wrote:
> >> On Sat, Apr 10, 2010 at 02:19:39PM +0300, Pasi Kärkkäinen wrote:
> >>   
> >>> On Fri, Apr 09, 2010 at 06:40:04PM -0700, Brandon Lamb wrote:
> >>>     
> >>>> Hello,
> >>>>
> >>>> Just did a fresh install of xen-4.0 and using the 2.6.31.13 dom0 kernel.
> >>>>
> >>>> 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.
> >>>>
> >>>>       
> >>> 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
> >>>
> >>>     
> >>
> >> And also:
> >> - ethtool -k peth0
> >>
> >> -- Pasi
> >>   
> >
> > Hi Pasi,
> >  I saw this post and I'm experiencing this checksumming problem as well.  
> > The setup is eucalyptus and whenever we try to ping an 'instance'  
> > machine from outside the cloud controller we see these errors.  Also  
> > when we try to ping from inside the instance to the public network.  We  
> > are running in NOVLAN mode across a bridge.
> >
> > Here are some details:  stats from the 'node controller' (which launches  
> > 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:~#
> 
> <snip>
> 
> > 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? 
> 
> > 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  
> > (2.6.31.6) compiled from Jeremy's git tree back about December.
> >
> 
> Ok. Did you try upgrading the dom0 kernel? 
> 

Replying here aswell.. this was a bug in the netback driver.

It should be fixed in the latest xen/stable-2.6.32.x tree (2.6.32.13).

-- Pasi


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>
  • Re: [Xen-devel] Re: [Xen-users] Attempting to checksum a non-TCP/UDP packet errors rolling across screen, Pasi Kärkkäinen <=