Statement of idempotency

quicwg · Jun 18, 2018 · 8002125 · 8002125
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diff --git a/draft-ietf-quic-transport.md b/draft-ietf-quic-transport.md
@@ -917,6 +917,11 @@ explained in more detail as they are referenced later in the document.
 | 0x10 - 0x17 | STREAM            | {{frame-stream}}            |
 {: #frame-types title="Frame Types"}
 
+All QUIC frames are idempotent.  That is, the state of the connection is
+unchanged regardless of whether a frame is processed one time or multiple times,
+and a frame can be received and processed without error at any point between the
+time the frame was initially sent and the end of the connection.
+
 # Life of a Connection
 
 A QUIC connection is a single conversation between two QUIC endpoints.  QUIC's