[ops] Any experience with DELL M640 and BCM57840 network card ?

Jay Pipes jaypipes at gmail.com
Wed Mar 27 19:31:57 UTC 2019


On 03/27/2019 01:35 AM, Massimo Sgaravatto wrote:
> 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 dependencies).
> 
> 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 not done.
> 
> I thought that disabling  tx-checksum-ipv4simply means that the checksum 
> is done in software instead of hardware (so just a matter of 
> performance), Am I wrong ?

No, you are correct. Whoever you spoke to at Dell didn't know what they 
were talking about.

-jay



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