RFC 9853: Return Routability Check for DTLS 1.2 and 1.3
Recent RFCs 2026-03-11
Summary:
This document specifies a Return Routability Check (RRC) subprotocol
for use in the context of the Connection ID (CID) construct for the
Datagram Transport Layer Security (DTLS) protocol versions 1.2 and
1.3.
Implementations offering the CID functionality described in RFCs 9146
and 9147 are encouraged to also provide the RRC functionality
described in this document. For this reason, this document updates
RFCs 9146 and 9147.