RFC 3162 (rfc3162) - Page 2 of 12

RADIUS and IPv6

RFC 3162                    RADIUS and IPv6                  August 2001


   the NAS to reserve use of an IPv4 address for a host that only
   supports IPv6; similarly, a host only using IPv4 or 6to4 [12] does
   not require allocation of an IPv6 prefix.

   The NAS can provide IPv6 access natively, or alternatively, via other
   methods such as IPv6 within IPv4 tunnels [15] or 6over4 [14].  The
   choice of method for providing IPv6 access has no effect on RADIUS
   usage per se, although if it is desired that an IPv6 within IPv4
   tunnel be opened to a particular location, then tunnel attributes
   should be utilized, as described in [6], [7].

1.1.  Requirements language

   In this document, the key words "MAY", "MUST, "MUST NOT", "optional",
   "recommended", "SHOULD", and "SHOULD NOT", are to be interpreted as
   described in [1].

2.  Attributes

2.1.  NAS-IPv6-Address

   Description

      This Attribute indicates the identifying IPv6 Address of the NAS
      which is requesting authentication of the user, and SHOULD be
      unique to the NAS within the scope of the RADIUS server.  NAS-
      IPv6-Address is only used in Access-Request packets.  NAS-IPv6-
      Address and/or NAS-IP-Address MAY be present in an Access-Request
      packet; however, if neither attribute is present then NAS-
      Identifier MUST be present.

   A summary of the NAS-IPv6-Address Attribute format is shown below.
   The fields are transmitted from left to right.

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |     Type      |    Length     |             Address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                                Address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                                Address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                                Address
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
               Address             |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+




Aboba, et al.               Standards Track