diff --git a/src/python/loxi/of13/const.py b/src/python/loxi/of13/const.py
index 35df7f0..71e7edc 100644
--- a/src/python/loxi/of13/const.py
+++ b/src/python/loxi/of13/const.py
@@ -226,6 +226,19 @@
     13: 'OFPBRC_MULTIPART_BUFFER_OVERFLOW',
 }
 
+# Identifiers from group ofp_bsn_anchor
+OFP_BSN_ANCHOR_PACKET_START = 0
+OFP_BSN_ANCHOR_L3_HEADER_START = 1
+OFP_BSN_ANCHOR_L4_HEADER_START = 2
+OFP_BSN_ANCHOR_L4_PAYLOAD_START = 3
+
+ofp_bsn_anchor_map = {
+    0: 'OFP_BSN_ANCHOR_PACKET_START',
+    1: 'OFP_BSN_ANCHOR_L3_HEADER_START',
+    2: 'OFP_BSN_ANCHOR_L4_HEADER_START',
+    3: 'OFP_BSN_ANCHOR_L4_PAYLOAD_START',
+}
+
 # Identifiers from group ofp_bsn_controller_connection_state
 OFP_BSN_CONTROLLER_CONNECTION_STATE_DISCONNECTED = 0
 OFP_BSN_CONTROLLER_CONNECTION_STATE_CONNECTED = 1