[ops] Any experience with DELL M640 and BCM57840 network card ?
massimo.sgaravatto at gmail.com
Wed Mar 27 05:35:10 UTC 2019
No, we are not using Kolla. We use the CentOS rpms to deploy
We contacted DELL support for this problem. Since iperf works without
problems, they suggest there is something 'wrong' (or at least incompatible
with that hw) in the used software (i.e OpenStack and/or related
As I said disabling tx-checksum-ipv4 I don't see anymore the problem, but
the DELL support guy claims that this is not safe because checksumming is
I thought that disabling tx-checksum-ipv4 simply means that the checksum
is done in software instead of hardware (so just a matter of performance),
Am I wrong ?
On Tue, Mar 26, 2019 at 7:45 PM Mohammed Naser <mnaser at vexxhost.com> wrote:
> I totally ran into this issue here.
> It seems another contributor ran into this. Are you deploying using Kolla?
> On Tue, Mar 26, 2019 at 1:29 PM Massimo Sgaravatto
> <massimo.sgaravatto at gmail.com> wrote:
> > Hi
> > Did someone try using DELL M640 with BCM57840 network card as compute
> nodes ?
> > I am asking because we are adding a new compute node with such hw
> configuration to our OpenStack Ocata installation (with CentOS 7.6).
> > Each tiime we create a VM on this compute node, the compute node crashes
> > Not clear which specific event triggers the problem.
> > It doesn't seem a hw problem (e.g. iperf works without problems).
> > We are using the same network card, but on different servers (e.g. on
> some M630 systems).
> > If we disable the tx-checksum-ipv4 on the data network interface (i.e.
> "ethtool -K em3 tx-checksum-ipv4 off") we don't see anymore the problem.
> > Thanks, Massimo
> Mohammed Naser — vexxhost
> D. 514-316-8872
> D. 800-910-1726 ext. 200
> E. mnaser at vexxhost.com
> W. http://vexxhost.com
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the openstack-discuss