[dpdk-dev] [PATCH v2] doc: add limitations for i40e PMD

[Mcnamara, John]

> -----Original Message-----
> From: Wu, Jingjing
> Sent: Friday, September 16, 2016 6:06 PM
> To: dev at dpdk.org
> Cc: Wu, Jingjing <jingjing.wu at intel.com>; Xing, Beilei
> <beilei.xing at intel.com>; Mcnamara, John <john.mcnamara at intel.com>
> Subject: [PATCH v2] doc: add limitations for i40e PMD
> 
> This patch adds "Limitations or Known issues" section for i40e PMD,
> including two items:
> 1. MPLS packet classification on X710/XL710 2. 16 Byte Descriptor cannot
> be used on DPDK VF
> 
> Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
>
> ...
>
> +Before NIC firmware version of 5.0, MPLS packet cannot be recognized by
> NIC.
> +The L2 Payload flow type in flow director can be used to classify MPLS
> +packet by the command in testpmd like:
> +
> +   testpmd> flow_director_filter 0 mode IP add flow l2_payload ether \
> +            0x8847 flexbytes () fwd pf queue <N> fd_id <M>
> +
> +In the NIC firmware whose version is 5.0 or greater, very limited MPLS
> +support is added: Native MPLS skip is implemented, that is, packet type
> +can be recognized like MPLS header is skipped, while no new packet type
> +and no more meta data is extracted from MPLS header.

This paragraph is a little confusing. Perhaps you could simplify/clarify it.