doc: add i40e limitation of VF VLAN strip

This patch adds limitation of VF VLAN strip function.

Signed-off-by: Beilei Xing <beilei.xing@intel.com>
Acked-by: John McNamara <john.mcnamara@intel.com>

diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst
index 05c1875..cd46874 100644 (file)
--- a/doc/guides/nics/i40e.rst
+++ b/doc/guides/nics/i40e.rst
@@ -478,6 +478,11 @@ enabled using the steps below.
 
       setpci -s <XX:XX.X> a8.w=<value>
 
+Vlan strip of VF
+~~~~~~~~~~~~~~~~
+
+The VF vlan strip function is only supported in the i40e kernel driver >= 2.1.26.
+
 High Performance of Small Packets on 40G NIC
 --------------------------------------------