1 files changed, 6 insertions, 1 deletions

diff --git a/draft-schanzen-gns.xml b/draft-schanzen-gns.xml
index 2d9f75e..fa3de05 100644
--- a/draft-schanzen-gns.xml
+++ b/draft-schanzen-gns.xml
@@ -1461,7 +1461,12 @@ NONCE := HKDF-Expand (PRK_n, label, 128 / 8)
        <dl>
          <dt>PROTO</dt>
          <dd>
-           the 16-bit protocol number, e.g. 6 for tcp. In network byte order.
+           the 16-bit protocol number, e.g. 6 for tcp.
+           Note that values
+           below 2^8 are reserved for allocation via IANA <xref target="RFC6895" />,
+           while values above 2^8 are allocated by the
+           GNUnet Assigned Numbers Authority <xref target="GANA" />.
+           In network byte order.
          </dd>
          <dt>SVC</dt>
          <dd>