http://www.rfc-editor.org/rfc/rfc4668.txt
RFC 4668: RADIUS Authentication Client MIB for IPv6, D. Nelson2006-08-01T23:00:00-00:00This memo obsoletes RFC 2618 by deprecating the MIB table containing IPv4-only address formats and defining a new table to add support for version-neutral IP address formats. The remaining MIB objects from RFC 2618 are carried forward into this document. The memo also adds UNITS and REFERENCE clauses to selected objects. [STANDARDS-TRACK]