Open Stack

On Wed, January 29, 2014 13:01, Alvise Dorigo wrote:

> I issued that command on my eth2 NIC which is connected to the
> data-network
>
> [root at network ~]# ethtool -k eth2 | grep offload
> tcp-segmentation-offload: on
> udp-fragmentation-offload: off
> generic-segmentation-offload: on
> generic-receive-offload: off
> large-receive-offload: off
>
[...]
>
> Did I do correctly ?
>
> The offload is on. Should I change it ? how ?

According to this "cookbook", all offloading should (?) be disabled:

https://github.com/stackforge/cookbook-openstack-network/blob/master/files/default/disable-eth-offload.sh

The GRO worked for us solving the DHCP issue. But you may be having
another problem that is causing the same sympton.

>> We recently solved this problem at $WORK by disabling GRO on our network
>> node.
>>
>> The other issue we've come across that may be related is MTUs: since
>> Open vSwitch 1.9+ got rid of Path MTU Discovery, you may need to adjust
your
>> MTUs:
>>
>>  http://techbackground.blogspot.ca/2013/06/path-mtu-discovery-and-gre.html
>
> In that article they talk about a GRE setup, but I choosed local
> (CONFIG_NEUTRON_OVS_TENANT_NETWORK_TYPE=local). Can I use that guide
> anyway ?

I don't know.