doc: comment testpmd checksum option

Add a comment for outer-ip option in csum command.
Set outer-ip option only when the packet is a IPv4 packet.

Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
Acked-by: Marvin Liu <yong.liu@intel.com>

diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 5272bf4..493a67c 100644 (file)
--- a/doc/guides/testpmd_app_ug/testpmd_funcs.rst
+++ b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
@@ -541,7 +541,7 @@ csum set (ip|udp|tcp|sctp|outer-ip) (hw|sw) (port_id)
 
 - ip|udp|tcp|sctp always concern the inner layer.
 
-- outer-ip concerns the outer IP layer in case the packet is recognized
+- outer-ip concerns the outer IP layer (only for IPv4) in case the packet is recognized
   as a tunnel packet by the forward engine (vxlan, gre and ipip are
   supported). See "csum parse-tunnel" command.