diff --git a/yabgp/common/constants.py b/yabgp/common/constants.py
index eddaf53..1ba9cb7 100644
--- a/yabgp/common/constants.py
+++ b/yabgp/common/constants.py
@@ -407,3 +407,28 @@
 
 
 COMMUNITY_DICT = False
+
+DSCP_NAMES = {
+    'be': 0,
+    'cs0': 0,
+    'cs1': 8,
+    'af11': 10,
+    'af12': 12,
+    'af13': 14,
+    'cs2': 16,
+    'af21': 18,
+    'af22': 20,
+    'af23': 22,
+    'cs3': 24,
+    'af31': 26,
+    'af32': 28,
+    'af33': 30,
+    'cs4': 32,
+    'af41': 34,
+    'af42': 36,
+    'af43': 38,
+    'cs5': 40,
+    'ef': 46,
+    'cs6': 48,
+    'cs7': 56
+}