{"draft":"draft-ietf-v6ops-prefer8781-07","doc_id":"RFC9872","title":"Recommendations for Discovering IPv6 Prefix Used for IPv6 Address Synthesis","authors":["N. Buraglio","T. Jensen","J. Linkova"],"format":["HTML","TEXT","PDF","XML"],"page_count":"10","pub_status":"INFORMATIONAL","status":"INFORMATIONAL","source":"IPv6 Operations","abstract":"On networks providing IPv4-IPv6 translation (RFC 7915), hosts and\r\nother endpoints need to know the IPv6 prefix(es) used for translation\r\n(the NAT64 prefix (RFC 6052)). This document provides guidelines for\r\nNAT64 prefix discovery, specifically recommending obtaining the NAT64\r\nprefix from the Router Advertisement option (RFC 8781) when\r\navailable.","pub_date":"September 2025","keywords":["IPv6","DNS64","PREF64","NAT64","CLAT"],"obsoletes":[],"obsoleted_by":[],"updates":[],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9872","errata_url":null}