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-rw-r--r--ryu/lib/packet/bgp.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/ryu/lib/packet/bgp.py b/ryu/lib/packet/bgp.py
index 55696bd1..8643fa03 100644
--- a/ryu/lib/packet/bgp.py
+++ b/ryu/lib/packet/bgp.py
@@ -41,6 +41,9 @@ BGP_MSG_NOTIFICATION = 3
BGP_MSG_KEEPALIVE = 4
BGP_MSG_ROUTE_REFRESH = 5 # RFC 2918
+# NOTIFICATION Error Code and SubCode
+# Note: 0 is a valid SubCode. (Unspecific)
+
# NOTIFICATION Error Code RFC 4271 4.5.
BGP_ERROR_MESSAGE_HEADER_ERROR = 1
BGP_ERROR_OPEN_MESSAGE_ERROR = 2