[ovs-discuss] Linux kernel panics when attaching eth cable

Jesse Gross jesse at nicira.com
Fri Jan 29 16:02:12 UTC 2010

The issue is that your network card uses a type of checksum offloading that
is not supported by earlier versions of OVS.  I recently added support to
the 'next' branch in our git repository, which hasn't been released yet but
you can try if you are feeling adventurous.

Alternately, I attached a version of the patch that should apply to 0.99.1.
 Let me know how it goes.


On Fri, Jan 29, 2010 at 9:55 AM, Paolo Cravero <pcravero at as2594.net> wrote:

> Good morning/evening,
> I tried both with 0.90.x and 0.99.1: as soon as I attach the network cable
> to a physical interface managed by openvswitch module, the system goes into
> kernel panic.
> Configuration in /etc/ovs-vswitchd.conf is:
> bridge.bridge0.port=peth0
> bridge.bridge0.port=eth1
> bridge.bridge0.port=oveth0
> bridge.bridge0.port=oveth1
> iface.oveth0.internal=true
> iface.oveth1.internal=true
> OS is CentOS 5.3 (yum updated today):
> Linux 2.6.18-164.11.1.el5xen #1 SMP Wed Jan 20 08:06:04 EST 2010 x86_64
> x86_64 x86_64 GNU/Linux
> Note: kernel panics occur with the non-xen kernel too.
> Physical interface peth0 is a Marvell Technology Group Ltd. 88E8053 PCI-E
> Gigabit Ethernet Controller (rev 20)
> I remove the bridge module. Load OVS:
> /sbin/insmod /root/setup/a/datapath/linux-2.6/openvswitch_mod.ko
> ovs-vswitchd /etc/ovs-vswitchd.conf
> As long as the cable is unplugged I can do all sort of configurations as of
> documentation. When I attach the network cable ... bump!
> Upstream switch is a Cisco device with parameters I cannot control.
> Am I doing something wrong? (quite possible since I'm new to linux kernel
> switches) Is it a hardware problem? Else?
> Thank you in advance for any support you'll be able to give.
> Paolo Cravero
> _______________________________________________
> discuss mailing list
> discuss at openvswitch.org
> http://openvswitch.org/mailman/listinfo/discuss_openvswitch.org
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