classifier: Support duplicate rules.

[cascardo/ovs.git] / DESIGN.md

diff --git a/DESIGN.md b/DESIGN.md
index 6f8d090..4d94c2d 100644 (file)
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -54,6 +54,8 @@ sent, an entry labeled "---" means that the message is suppressed.
     OFPR_NO_MATCH                              yes       ---
     OFPR_ACTION                                yes       ---
     OFPR_INVALID_TTL                           ---       ---
+    OFPR_ACTION_SET (OF1.4+)                   yes       ---
+    OFPR_GROUP (OF1.4+)                        yes       ---
 
   OFPT_FLOW_REMOVED / NXT_FLOW_REMOVED
     OFPRR_IDLE_TIMEOUT                         yes       ---
@@ -277,8 +279,11 @@ The table for 1.3 is the same as the one shown above for 1.2.
 OpenFlow 1.4
 ------------
 
-OpenFlow 1.4 does not change flow_mod semantics.
-
+OpenFlow 1.4 adds the "importance" field to flow_mods, but it does not
+explicitly specify which kinds of flow_mods set the importance.For
+consistency, Open vSwitch uses the same rule for importance as for
+idle_timeout and hard_timeout, that is, only an "ADD" flow_mod sets
+the importance.  (This issue has been filed with the ONF as EXT-496.)
 
 OFPT_PACKET_IN
 ==============