[dpdk-dev] [PATCH] doc/testpmd_app_ug:add a comment for outer-ip option in csum

[Jijiang Liu]

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 at intel.com>
---
 doc/guides/testpmd_app_ug/testpmd_funcs.rst |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/doc/guides/testpmd_app_ug/testpmd_funcs.rst b/doc/guides/testpmd_app_ug/testpmd_funcs.rst
index 4652962..c8baa76 100644
--- 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.
 
-- 
1.7.7.6