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From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>,
 Akhil Goyal <akhil.goyal@nxp.com>
Cc: dev@dpdk.org
Date: Mon, 18 Jul 2016 15:20:26 +0200
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Subject: Re: [dpdk-dev] ip_chksum not updated in ipsec-secgw application
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2016-07-18 13:57, Sergio Gonzalez Monroy:
> On 18/07/2016 13:41, Akhil Goyal wrote:
> > In Ipsec-secgw application, while adding the outer IP header,
> > it seems that the application does not update the checksum value
> > for outbound packets. This result in incorrect ip->checksum in
> > the encrypted packet.
[...]
> 
> It is intentional. The application is using IP checksum offload

The correct behaviour is to have a software fallback (using rte_ip.h)
for drivers which do not support checksum offload.
But given it is just an example, it is normal to have this kind of
constraint. However I think it should be explained in its doc.
And a list of tested NICs would be nice to have.