X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=doc%2Fguides%2Fnics%2Fmlx5.rst;h=a68b7adc0576188124376f4544751f93d62d263f;hb=7555c20f2c2df8dbcf648e97a7005966048a0353;hp=da6dc278e52cabc8e3e03249b6ceeb696ed42bc9;hpb=7595afa4d30097c1177b69257118d8ad89a539be;p=deb_dpdk.git

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index da6dc278..a68b7adc 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -330,6 +330,26 @@ Supported NICs
 * Mellanox(R) ConnectX(R)-5 100G MCX556A-ECAT (2x100G)
 * Mellanox(R) ConnectX(R)-5 Ex EN 100G MCX516A-CDAT (2x100G)
 
+Known issues
+------------
+
+* **Flow pattern without any specific vlan will match for vlan packets as well.**
+
+  When VLAN spec is not specified in the pattern, the matching rule will be created with VLAN as a wild card.
+  Meaning, the flow rule::
+
+        flow create 0 ingress pattern eth / vlan vid is 3 / ipv4 / end ...
+
+  Will only match vlan packets with vid=3. and the flow rules::
+
+        flow create 0 ingress pattern eth / ipv4 / end ...
+
+  Or::
+
+        flow create 0 ingress pattern eth / vlan / ipv4 / end ...
+
+  Will match any ipv4 packet (VLAN included).
+
 Notes for testpmd
 -----------------