RFC 3162 (rfc3162) - Page 2 of 12
RADIUS and IPv6
Alternative Format: Original Text Document
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