[dts] [dts 5/7] test_plans/ipv4_reassembly_test_plan:update test plan to sync with testsuite

[Xie wei]

Signed-off-by: Xie wei <weix.xie at intel.com>
---
 test_plans/ipv4_reassembly_test_plan.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test_plans/ipv4_reassembly_test_plan.rst b/test_plans/ipv4_reassembly_test_plan.rst
index 686584d..75aba16 100644
--- a/test_plans/ipv4_reassembly_test_plan.rst
+++ b/test_plans/ipv4_reassembly_test_plan.rst
@@ -99,7 +99,9 @@ Sample command::
   ./examples/ip_reassembly/build/ip_reassembly -c 0x2 -n 4 -- \
       -P -p 0x2 --config "(1,0,1)" --maxflows=4096 --flowttl=10s
 
-Modifies the sample app source code to enable up to 7 fragments per packet.
+Modifies the sample app source code to enable up to 7 fragments per packet,
+and it need set the "CONFIG_RTE_LIBRTE_IP_FRAG_MAX_FRAG=7" in ./config/common_base and re-build DPDK.
+
 Sends 4K packets split in 7 fragments each with a ``maxflows`` of 4K.
 
 It expects:
-- 
2.17.1