[Docs] [txt|pdf] [draft-ietf-radext...] [Diff1] [Diff2]

PROPOSED STANDARD

Internet Engineering Task Force (IETF)                          B. Aboba
Request for Comments: 7268                         Microsoft Corporation
Updates: 3580, 4072                                           J. Malinen
Category: Standards Track                                    Independent
ISSN: 2070-1721                                               P. Congdon
                                                         Tallac Networks
                                                              J. Salowey
                                                           Cisco Systems
                                                                M. Jones
                                                           Azuca Systems
                                                               July 2014


                RADIUS Attributes for IEEE 802 Networks

Abstract

   RFC 3580 provides guidelines for the use of the Remote Authentication
   Dial-In User Service (RADIUS) within IEEE 802 local area networks
   (LANs).  This document defines additional attributes for use within
   IEEE 802 networks and clarifies the usage of the EAP-Key-Name
   Attribute and the Called-Station-Id Attribute.  This document updates
   RFCs 3580 and 4072.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7268.














Aboba, et al.                Standards Track                    [Page 1]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

























Aboba, et al.                Standards Track                    [Page 2]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


Table of Contents

   1. Introduction ....................................................3
      1.1. Terminology ................................................4
      1.2. Requirements Language ......................................4
   2. RADIUS Attributes ...............................................5
      2.1. Allowed-Called-Station-Id ..................................5
      2.2. EAP-Key-Name ...............................................6
      2.3. EAP-Peer-Id ................................................7
      2.4. EAP-Server-Id ..............................................8
      2.5. Mobility-Domain-Id .........................................9
      2.6. Preauth-Timeout ...........................................10
      2.7. Network-Id-Name ...........................................11
      2.8. EAPoL-Announcement ........................................12
      2.9. WLAN-HESSID ...............................................14
      2.10. WLAN-Venue-Info ..........................................14
      2.11. WLAN-Venue-Language ......................................16
      2.12. WLAN-Venue-Name ..........................................17
      2.13. WLAN-Reason-Code .........................................18
      2.14. WLAN-Pairwise-Cipher .....................................19
      2.15. WLAN-Group-Cipher ........................................20
      2.16. WLAN-AKM-Suite ...........................................21
      2.17. WLAN-Group-Mgmt-Cipher ...................................22
      2.18. WLAN-RF-Band .............................................23
   3. Table of Attributes ............................................24
   4. IANA Considerations ............................................25
   5. Security Considerations ........................................25
   6. References .....................................................26
      6.1. Normative References ......................................26
      6.2. Informative References ....................................27
   7. Acknowledgments ................................................28

1.  Introduction

   In situations where it is desirable to centrally manage
   authentication, authorization, and accounting (AAA) for IEEE 802
   [IEEE-802] networks, deployment of a backend authentication and
   accounting server is desirable.  In such situations, it is expected
   that IEEE 802 authenticators will function as AAA clients.

   "IEEE 802.1X Remote Authentication Dial In User Service (RADIUS)
   Usage Guidelines" [RFC3580] provides guidelines for the use of the
   Remote Authentication Dial-In User Service (RADIUS) within networks
   utilizing IEEE 802 local area networks.  This document defines
   additional attributes suitable for usage by IEEE 802 authenticators
   acting as AAA clients.





Aboba, et al.                Standards Track                    [Page 3]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


1.1.  Terminology

   This document uses the following terms:

   Access Point (AP)
      A Station that provides access to the distribution services via
      the wireless medium for associated Stations.

   Association
      The service used to establish Access Point/Station mapping and
      enable Station invocation of the distribution system services.

   Authenticator
      An entity that requires authentication from the Supplicant.  The
      authenticator may be connected to the Supplicant at the other end
      of a point-to-point LAN segment or wireless link.

   Authentication Server
      An entity that provides an authentication service to an
      authenticator.  This service verifies the claim of identity made
      by the Supplicant using the credentials provided by the Supplicant

   Station (STA)
      Any device that contains an IEEE 802.11 conformant Medium Access
      Control (MAC) and Physical Layer (PHY) interface to the wireless
      medium (WM).

   Supplicant
      An entity that is being authenticated by an authenticator.  The
      Supplicant may be connected to the authenticator at one end of a
      point-to-point LAN segment or 802.11 wireless link.

1.2.  Requirements Language

   In this document, several words are used to signify the requirements
   of the specification.  The key words "MUST", "MUST NOT", "REQUIRED",
   "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY",
   and "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].












Aboba, et al.                Standards Track                    [Page 4]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.  RADIUS Attributes

2.1.  Allowed-Called-Station-Id

   Description

      The Allowed-Called-Station-Id Attribute allows the RADIUS server
      to specify the authenticator MAC addresses and/or networks to
      which the user is allowed to connect.  One or more Allowed-Called-
      Station-Id Attributes MAY be included in an Access-Accept, CoA-
      Request, or Accounting-Request packet.

      The Allowed-Called-Station-Id Attribute can be useful in
      situations where pre-authentication is supported (e.g., IEEE
      802.11 pre-authentication).  In these scenarios, a Called-Station-
      Id Attribute typically will not be included within the Access-
      Request so that the RADIUS server will not know the network that
      the user is attempting to access.  The Allowed-Called-Station-Id
      enables the RADIUS server to restrict the networks and attachment
      points to which the user can subsequently connect.

      A summary of the Allowed-Called-Station-Id 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       |            String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      174

   Length

      >=3

   String

      The String field is one or more octets, specifying a Called-
      Station-Id that the user MAY connect to; if the Called-Station-Id
      that the user connects to does not match one of the Allowed-
      Called-Station-Id Attributes, the Network Access Server (NAS) MUST
      NOT permit the user to access the network.






Aboba, et al.                Standards Track                    [Page 5]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      In the case of IEEE 802, the Allowed-Called-Station-Id Attribute
      is used to store the Medium Access Control (MAC) address,
      represented as an uppercase ASCII character string in Canonical
      format and with octet values separated by a "-", for example,
      "00-10-A4-23-19-C0".  Where restrictions on both the network and
      authenticator MAC address usage are intended, the network name
      MUST be appended to the authenticator MAC address, separated from
      the MAC address with a ":", for example, "00-10-A4-23-19-C0:AP1".
      Where no MAC address restriction is intended, the MAC address
      field MUST be omitted, but ":" and the network name field MUST be
      included, for example, ":AP1".

      Within IEEE 802.11 [IEEE-802.11], the Service Set Identifier
      (SSID) constitutes the network name; within IEEE 802.1X
      [IEEE-802.1X] wired networks, the Network-Id Name (NID-Name)
      constitutes the network name.  Since a NID-Name can be up to 253
      octets in length, when used with [IEEE-802.1X] wired networks,
      there may not be sufficient room within the Allowed-Called-
      Station-Id Attribute to include both a MAC address and a network
      name.  However, as the Allowed-Called-Station-Id Attribute is
      expected to be used largely in wireless access scenarios, this
      restriction is not considered serious.

2.2.  EAP-Key-Name

   Description

      The EAP-Key-Name Attribute, defined in "Diameter Extensible
      Authentication Protocol (EAP) Application" [RFC4072], contains the
      EAP Session-Id, as described in "Extensible Authentication
      Protocol (EAP) Key Management Framework" [RFC5247].  Exactly how
      this attribute is used depends on the link layer in question.

      It should be noted that not all link layers use this name.  An
      EAP-Key-Name Attribute MAY be included within Access-Request,
      Access-Accept, and CoA-Request packets.  A summary of the EAP-Key-
      Name 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       |          String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      102 [RFC4072]



Aboba, et al.                Standards Track                    [Page 6]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


   Length

      >=3

   String

      The String field is one or more octets, containing the EAP
      Session-Id, as defined in "Extensible Authentication Protocol
      (EAP) Key Management Framework" [RFC5247].  Since the NAS operates
      as a pass-through in EAP, it cannot know the EAP Session-Id before
      receiving it from the RADIUS server.  As a result, an EAP-Key-Name
      Attribute sent in an Access-Request MUST only contain a single NUL
      character.  A RADIUS server receiving an Access-Request with an
      EAP-Key-Name Attribute containing anything other than a single NUL
      character MUST silently discard the attribute.  In addition, the
      RADIUS server SHOULD include this attribute in an Access-Accept or
      CoA-Request only if an EAP-Key-Name Attribute was present in the
      Access-Request.  Since a NAS will typically only include an EAP-
      Key-Name Attribute in an Access-Request in situations where the
      attribute is required to provision service, if an EAP-Key-Name
      Attribute is included in an Access-Request but is not present in
      the Access-Accept, the NAS SHOULD treat the Access-Accept as
      though it were an Access-Reject.  If an EAP-Key-Name Attribute was
      not present in the Access-Request but is included in the Access-
      Accept, then the NAS SHOULD silently discard the EAP-Key-Name
      Attribute.  As noted in Section 6.2.2 of [IEEE-802.1X], the
      Connectivity Association Key Name (CKN) is derived from the EAP
      Session-Id, and, as described in Section 9.3.3 of [IEEE-802.1X],
      the CKN is subsequently used in the derivation of the Key
      Encrypting Key (KEK) and the Integrity Check Value Key (ICK),
      which protect the Secure Association Keys (SAKs) utilized by Media
      Access Control Security (MACsec).  As a result, for the NAS to
      acquire information needed in the MACsec Key Agreement (MKA)
      exchange, it needs to include the EAP-Key-Name Attribute in the
      Access-Request and receive it from the RADIUS server in the
      Access-Accept.

2.3.  EAP-Peer-Id

   Description

      The EAP-Peer-Id Attribute contains a Peer-Id generated by the EAP
      method.  Exactly how this name is used depends on the link layer
      in question.  See [RFC5247] for more discussion.  The EAP-Peer-Id
      Attribute MAY be included in Access-Request, Access-Accept, and
      Accounting-Request packets.  More than one EAP-Peer-Id Attribute
      MUST NOT be included in an Access-Request; one or more EAP-Peer-Id
      Attributes MAY be included in an Access-Accept.



Aboba, et al.                Standards Track                    [Page 7]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      It should be noted that not all link layers use this name, and
      existing EAP method implementations do not generate it.  Since the
      NAS operates as a pass-through in EAP [RFC3748], it cannot know
      the EAP-Peer-Id before receiving it from the RADIUS server.  As a
      result, an EAP-Peer-Id Attribute sent in an Access-Request MUST
      only contain a single NUL character.  A home RADIUS server
      receiving an Access-Request with an EAP-Peer-Id Attribute
      containing anything other than a single NUL character MUST
      silently discard the attribute.  In addition, the home RADIUS
      server SHOULD include one or more EAP-Peer-Id Attributes in an
      Access-Accept only if an EAP-Peer-Id Attribute was present in the
      Access-Request.  If a NAS receives EAP-Peer-Id Attribute(s) in an
      Access-Accept without having included one in an Access-Request,
      the NAS SHOULD silently discard the attribute(s).  A summary of
      the EAP-Peer-Id 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       |            String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      175

   Length

      >=3

   String

      The String field is one or more octets, containing an EAP Peer-Id
      exported by the EAP method.  For details, see Appendix A of
      [RFC5247].  A robust implementation SHOULD support the field as
      undistinguished octets.  Only a single EAP Peer-Id may be included
      per attribute.

2.4.  EAP-Server-Id

   Description

      The EAP-Server-Id Attribute contains a Server-Id generated by the
      EAP method.  Exactly how this name is used depends on the link
      layer in question.  See [RFC5247] for more discussion.  The EAP-
      Server-Id Attribute is only allowed in Access-Request, Access-
      Accept, and Accounting-Request packets.  More than one EAP-Server-



Aboba, et al.                Standards Track                    [Page 8]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      Id Attribute MUST NOT be included in an Access-Request; one or
      more EAP-Server-Id Attributes MAY be included in an Access-Accept.

      It should be noted that not all link layers use this name, and
      existing EAP method implementations do not generate it.  Since the
      NAS operates as a pass-through in EAP [RFC3748], it cannot know
      the EAP-Server-Id before receiving it from the RADIUS server.  As
      a result, an EAP-Server-Id Attribute sent in an Access-Request
      MUST contain only a single NUL character.  A home RADIUS server
      receiving an Access-Request with an EAP-Server-Id Attribute
      containing anything other than a single NUL character MUST
      silently discard the attribute.  In addition, the home RADIUS
      server SHOULD include this attribute in an Access-Accept only if
      an EAP-Server-Id Attribute was present in the Access-Request.  A
      summary of the EAP-Server-Id 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       |            String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      176

   Length

      >=3

   String

      The String field is one or more octets, containing an EAP Server-
      Id exported by the EAP method.  For details, see Appendix A of
      [RFC5247].  A robust implementation SHOULD support the field as
      undistinguished octets.

2.5.  Mobility-Domain-Id

   Description

      A single Mobility-Domain-Id Attribute MAY be included in an
      Access-Request or Accounting-Request in order to enable the NAS to
      provide the RADIUS server with the Mobility Domain Identifier
      (MDID), defined in Section 8.4.2.49 of [IEEE-802.11].  A summary
      of the Mobility-Domain-Id Attribute format is shown below.  The
      fields are transmitted from left to right.



Aboba, et al.                Standards Track                    [Page 9]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


       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     |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      177

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer.  The two most significant octets MUST be set to zero by
      the sender and are ignored by the receiver; the two least
      significant octets contain the Mobility Domain Identifier (MDID)
      defined in Section 8.4.2.49 of [IEEE-802.11].

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            Reserved           |   Mobility Domain Identifier  |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

2.6.  Preauth-Timeout

   Description

      This attribute sets the maximum number of seconds that pre-
      authentication state is required to be kept by the NAS without
      being utilized within a user session.  For example, when
      [IEEE-802.11] pre-authentication is used, if a user has not
      attempted to utilize the Pairwise Master Key (PMK) derived as a
      result of pre-authentication within the time specified by the
      Preauth-Timeout Attribute, the PMK MAY be discarded by the Access
      Point.  However, once the session is underway, the Preauth-Timeout
      Attribute has no bearing on the maximum session time for the user
      or the maximum time during which key state may be kept prior to
      re-authentication.  This is determined by the Session-Timeout
      Attribute, if present.





Aboba, et al.                Standards Track                   [Page 10]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      A single Preauth-Timeout Attribute MAY be included within an
      Access-Accept or CoA-Request packet.  A summary of the Preauth-
      Timeout 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     |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value (cont)         |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      178

   Length

      6

   Value

      The field is 4 octets, containing a 32-bit unsigned integer
      encoding the maximum time in seconds that pre-authentication state
      should be retained by the NAS.

2.7.  Network-Id-Name

   Description

      The Network-Id-Name Attribute is utilized by implementations of
      IEEE-802.1X [IEEE-802.1X] to specify the name of a Network-Id
      (NID-Name).

      Unlike the IEEE 802.11 SSID (which is a maximum of 32 octets in
      length), the NID-Name may be up to 253 octets in length.
      Consequently, if the MAC address is included within the Called-
      Station-Id Attribute, it is possible that there will not be enough
      remaining space to encode the NID-Name as well.  Therefore, when
      used with IEEE 802.1X [IEEE-802.1X], the Called-Station-Id
      Attribute SHOULD contain only the MAC address, with the Network-
      Id-Name Attribute used to transmit the NID-Name.  The Network-Id-
      Name Attribute MUST NOT be used to encode the IEEE 802.11 SSID; as
      noted in [RFC3580], the Called-Station-Id Attribute is used for
      this purpose.





Aboba, et al.                Standards Track                   [Page 11]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      Zero or one Network-Id-Name Attribute is permitted within an
      Access-Request, Access-Challenge, Access-Accept or Accounting-
      Request packet.  When included within an Access-Request packet,
      the Network-Id-Name Attribute represents a hint of the NID-Name to
      which the Supplicant should be granted access.  When included
      within an Access-Accept packet, the Network-Id-Name Attribute
      represents the NID-Name to which the Supplicant is to be granted
      access.  When included within an Accounting-Request packet, the
      Network-Id-Name Attribute represents the NID-Name to which the
      Supplicant has been granted access.

      A summary of the Network-Id-Name 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       |            String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      179

   Length

      >=3

   String

      The String field is one or more octets, containing a NID-Name.
      For details, see [IEEE-802.1X].  A robust implementation SHOULD
      support the field as undistinguished octets.

2.8.  EAPoL-Announcement

   Description

      The EAPoL-Announcement Attribute contains EAPoL-Announcement Type-
      Length-Value (TLV) tuples defined within Table 11-8 of IEEE-802.1X
      [IEEE-802.1X].  The acronym "EAPoL" stands for Extensible
      Authentication Protocol over Local Area Network.

      Zero or more EAPoL-Announcement Attributes are permitted within an
      Access-Request, Access-Accept, Access-Challenge, Access-Reject,
      Accounting-Request, CoA-Request, or Disconnect-Request packet.





Aboba, et al.                Standards Track                   [Page 12]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      When included within an Access-Request packet, EAPoL-Announcement
      Attributes contain EAPoL-Announcement TLVs that the user sent in
      an EAPoL-Announcement.  When included within an Access-Accept,
      Access-Challenge, Access-Reject, CoA-Request or Disconnect-Request
      packet, EAPoL-Announcement Attributes contain EAPoL-Announcement
      TLVs that the NAS is to send to the user in a unicast EAPoL-
      Announcement.  When sent within an Accounting-Request packet,
      EAPoL-Announcement Attributes contain EAPoL-Announcement TLVs that
      the NAS has most recently sent to the user in a unicast EAPoL-
      Announcement.

      A summary of the EAPoL-Announcement 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     |             String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      180

   Length

      >=3

   String

      The String field is one or more octets, containing EAPoL-
      Announcement TLVs in the format defined in Figure 11-8 of Section
      11.12 of [IEEE-802.1X].  Any EAPoL-Announcement TLV Type MAY be
      included within an EAPoL-Announcement Attribute, including
      Organizationally Specific TLVs.  If multiple EAPoL-Announcement
      Attributes are present in a packet, their String fields MUST be
      concatenated before being parsed for EAPoL-Announcement TLVs; this
      allows EAPoL-Announcement TLVs longer than 253 octets to be
      transported by RADIUS.  Similarly, EAPoL-Announcement TLVs larger
      than 253 octets MUST be fragmented between multiple EAPoL-
      Announcement Attributes.










Aboba, et al.                Standards Track                   [Page 13]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.9.  WLAN-HESSID

   Description

      The WLAN-HESSID Attribute contains a MAC address that identifies
      the Homogenous Extended Service Set.  The HESSID is a globally
      unique identifier that, in conjunction with the SSID, encoded
      within the Called-Station-Id Attribute as described in [RFC3580],
      may be used to provide network identification for a subscription
      service provider network (SSPN), as described in Section 8.4.2.94
      of [IEEE-802.11].  Zero or one WLAN-HESSID Attribute is permitted
      within an Access-Request or Accounting-Request packet.

      A summary of the WLAN-HESSID 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     |          String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      181

   Length

      19

   String

      The String field is encoded in uppercase ASCII characters with the
      octet values separated by dash characters, as described in RFC
      3580 [RFC3580], for example, "00-10-A4-23-19-C0".

2.10.  WLAN-Venue-Info

   Description

      The WLAN-Venue-Info Attribute identifies the category of venue
      hosting the WLAN, as defined in Section 8.4.1.34 of [IEEE-802.11].
      Zero or more WLAN-Venue-Info Attributes may be included in an
      Access-Request or Accounting-Request.







Aboba, et al.                Standards Track                   [Page 14]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      A summary of the WLAN-Venue-Info 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     |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      182

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer.  The two most significant octets MUST be set to zero by
      the sender, and are ignored by the receiver; the two least
      significant octets contain the Venue Group and Venue Type fields.

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            Reserved           |  Venue Group  |  Venue Type   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

      Venue Group

         The Venue Group field is a single octet and describes the broad
         category of the venue, e.g., "Assembly".  See Section 8.4.1.34
         of [IEEE-802.11] for Venue Group codes and descriptions.

      Venue Type

         The Venue Type field is a single octet and describes the venue
         in a finer granularity within the Venue Group, e.g., "Library".
         See Section 8.4.1.34 of [IEEE-802.11] for Venue Type codes and
         descriptions.







Aboba, et al.                Standards Track                   [Page 15]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.11.  WLAN-Venue-Language

   Description

      The WLAN-Venue-Language Attribute is a string encoded by
      ISO-14962-1997 [ISO-14962-1997] that defines the language used in
      the WLAN-Venue-Name Attribute.  Zero or more WLAN-Venue-Language
      Attributes may be included in an Access-Request or Accounting-
      Request, and each one indicates the language of the WLAN-Venue-
      Name Attribute that follows it.

      A summary of the WLAN-Venue-Language 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     |         String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
        String (cont) |
      +-+-+-+-+-+-+-+-+

   Type

      183

   Length

      4-5

   String

      The String field is a two- or three-character language code
      selected from ISO-639 [ISO-639].  A two-character language code
      has a zero ("null" in ISO-14962-1997) appended to make it 3 octets
      in length.















Aboba, et al.                Standards Track                   [Page 16]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.12.  WLAN-Venue-Name

   Description

      The WLAN-Venue-Name Attribute provides additional metadata on the
      Basic Service Set (BSS).  For example, this information may be
      used to assist a user in selecting the appropriate BSS with which
      to associate.  Zero or more WLAN-Venue-Name Attributes may be
      included in an Access- Request or Accounting-Request in the same
      or different languages.

      A summary of the WLAN-Venue-Name 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     |          String...
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      184

   Length

      >=3

   String

      The String field is encoded in UTF-8 and contains the venue's
      name.  The maximum length of this field is 252 octets.



















Aboba, et al.                Standards Track                   [Page 17]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.13.  WLAN-Reason-Code

   Description

      The WLAN-Reason-Code Attribute contains information on the reason
      why a Station has been refused network access and has been
      disassociated or de-authenticated.  This can occur due to policy
      or for reasons related to the user's subscription.

      A WLAN-Reason-Code Attribute MAY be included within an Access-
      Reject or Disconnect-Request packet, as well as within an
      Accounting-Request packet.  Upon receipt of an Access-Reject or
      Disconnect-Request packet containing a WLAN-Reason-Code Attribute,
      the WLAN-Reason-Code value is copied by the Access Point into the
      Reason Code field of a Disassociation or Deauthentication frame
      (see Clauses 8.3.3.4 and 8.3.3.12, respectively, in
      [IEEE-802.11]), which is subsequently transmitted to the Station.

      A summary of the WLAN-Reason-Code 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       |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      185

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer.  The two most significant octets MUST be set to zero by
      the sender and are ignored by the receiver; the two least
      significant octets contain the Reason Code values defined in Table
      8-36 of Section 8.4.1.7 of [IEEE-802.11].







Aboba, et al.                Standards Track                   [Page 18]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            Reserved           |          Reason Code          |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

2.14.  WLAN-Pairwise-Cipher

   Description

      The WLAN-Pairwise-Cipher Attribute contains information on the
      pairwise ciphersuite used to establish the robust security network
      association (RSNA) between the AP and mobile device.  A WLAN-
      Pairwise-Cipher Attribute MAY be included within Access-Request
      and Accounting-Request packets.

      A summary of the WLAN-Pairwise-Cipher 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       |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      186

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer, in Suite selector format as specified in Figure 8-187
      within Section 8.4.2.27.2 of [IEEE-802.11], with values of OUI and
      Suite Type drawn from Table 8-99.

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                OUI                            |  Suite Type   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+




Aboba, et al.                Standards Track                   [Page 19]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.15.  WLAN-Group-Cipher

   Description

      The WLAN-Group-Cipher Attribute contains information on the group
      ciphersuite used to establish the robust security network
      association (RSNA) between the AP and mobile device.  A WLAN-
      Group-Cipher Attribute MAY be included within Access-Request and
      Accounting-Request packets.

      A summary of the WLAN-Group-Cipher 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       |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      187

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer, in Suite selector format as specified in Figure 8-187
      within Section 8.4.2.27.2 of [IEEE-802.11], with values of OUI and
      Suite Type drawn from Table 8-99.

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                OUI                            |  Suite Type   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+










Aboba, et al.                Standards Track                   [Page 20]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.16.  WLAN-AKM-Suite

   Description

      The WLAN-AKM-Suite Attribute contains information on the
      authentication and key management suite used to establish the
      robust security network association (RSNA) between the AP and
      mobile device.  A WLAN-AKM-Suite Attribute MAY be included within
      Access-Request and Accounting-Request packets.

      A summary of the WLAN-AKM-Suite 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       |             Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      188

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer, in Suite selector format as specified in Figure 8-187
      within Section 8.4.2.27.2 of [IEEE-802.11], with values of OUI and
      Suite Type drawn from Table 8-101:

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                OUI                            |  Suite Type   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+










Aboba, et al.                Standards Track                   [Page 21]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.17.  WLAN-Group-Mgmt-Cipher

   Description

      The WLAN-Group-Mgmt-Cipher Attribute contains information on the
      group management cipher used to establish the robust security
      network association (RSNA) between the AP and mobile device.

      Zero or one WLAN-Group-Mgmt-Cipher Attribute MAY be included
      within Access-Request and Accounting-Request packets.  The
      presence of the Attribute indicates that the Station negotiated to
      use management frame protection during association.

      A summary of the WLAN-Group-Mgmt-Cipher 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       |     Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      189

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer, in Suite selector format as specified in Figure 8-187
      within Section 8.4.2.27.2 of [IEEE-802.11], with values of OUI and
      Suite Type drawn from Table 8-99:

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |                OUI                            |  Suite Type   |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+







Aboba, et al.                Standards Track                   [Page 22]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


2.18.  WLAN-RF-Band

   Description

      The WLAN-RF-Band Attribute contains information on the radio
      frequency (RF) band used by the Access Point for transmission and
      reception of information to and from the mobile device.  Zero or
      one WLAN-RF-Band Attribute MAY be included within an Access-
      Request or Accounting-Request packet.

      A summary of the WLAN-RF-Band 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       |     Value
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
                 Value                |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   Type

      190

   Length

      6

   Value

      The Value field is four octets, containing a 32-bit unsigned
      integer.  The three most significant octets MUST be set to zero by
      the sender and are ignored by the receiver; the least significant
      octet contains the RF Band field, whose values are defined by the
      IEEE 802.11 Band ID field (Table 8-53a of [IEEE-802.11ad])

      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
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |            Reserved                           |    RF Band    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+









Aboba, et al.                Standards Track                   [Page 23]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


3.  Table of Attributes

   The following table provides a guide to which attributes may be found
   in which kinds of packets and in what quantity.

   Access-  Access-  Access-  Access-
   Request  Accept   Reject   Challenge  #   Attribute
   0        0+       0        0        174  Allowed-Called-Station-Id
   0-1      0-1      0        0        102   EAP-Key-Name
   0-1      0+       0        0        175  EAP-Peer-Id
   0-1      0+       0        0        176  EAP-Server-Id
   0-1      0        0        0        177  Mobility-Domain-Id
   0-1      0-1      0        0        178  Preauth-Timeout
   0-1      0        0        0        179  Network-Id-Name
   0+       0+       0+       0+       180  EAPoL-Announcement
   0-1      0        0        0        181  WLAN-HESSID
   0-1      0        0        0        182  WLAN-Venue-Info
   0+       0        0        0        183  WLAN-Venue-Language
   0+       0        0        0        184  WLAN-Venue-Name
   0        0        0-1      0        185  WLAN-Reason-Code
   0-1      0        0        0        186  WLAN-Pairwise-Cipher
   0-1      0        0        0        187  WLAN-Group-Cipher
   0-1      0        0        0        188  WLAN-AKM-Suite
   0-1      0        0        0        189  WLAN-Group-Mgmt-Cipher
   0-1      0        0        0        190  WLAN-RF-Band

   CoA- Dis-  Acct-
   Req  Req   Req  #      Attribute
   0+    0    0+   174   Allowed-Called-Station-Id
   0-1   0    0    102   EAP-Key-Name
   0     0    0+   175   EAP-Peer-Id
   0     0    0+   176   EAP-Server-Id
   0     0    0-1  177   Mobility-Domain-Id
   0-1   0    0    178   Preauth-Timeout
   0     0    0-1  179   Network-Id-Name
   0+    0+   0+   180   EAPoL-Announcement
   0     0    0-1  181   WLAN-HESSID
   0     0    0-1  182   WLAN-Venue-Info
   0     0    0+   183   WLAN-Venue-Language
   0     0    0+   184   WLAN-Venue-Name
   0     0-1  0-1  185   WLAN-Reason-Code
   0     0    0-1  186   WLAN-Pairwise-Cipher
   0     0    0-1  187   WLAN-Group-Cipher
   0     0    0-1  188   WLAN-AKM-Suite
   0     0    0-1  189   WLAN-Group-Mgmt-Cipher
   0     0    0-1  190   WLAN-RF-Band





Aboba, et al.                Standards Track                   [Page 24]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


   The following table defines the above table entries.

   0     This attribute MUST NOT be present in packet.
   0+    Zero or more instances of this attribute MAY be present in the
         packet.
   0-1   Zero or one instance of this attribute MAY be present in the
         packet.

4.  IANA Considerations

   This document uses the RADIUS [RFC2865] namespace; see
   <http://www.iana.org/assignments/radius-types>.  Per this
   specification, RADIUS attribute types have been assigned for the
   following attributes:

   Attribute                        Type
   =========                        ====
   Allowed-Called-Station-Id        174
   EAP-Peer-Id                      175
   EAP-Server-Id                    176
   Mobility-Domain-Id               177
   Preauth-Timeout                  178
   Network-Id-Name                  179
   EAPoL-Announcement               180
   WLAN-HESSID                      181
   WLAN-Venue-Info                  182
   WLAN-Venue-Language              183
   WLAN-Venue-Name                  184
   WLAN-Reason-Code                 185
   WLAN-Pairwise-Cipher             186
   WLAN-Group-Cipher                187
   WLAN-AKM-Suite                   188
   WLAN-Group-Mgmt-Cipher           189
   WLAN-RF-Band                     190

   Since this specification relies entirely on values assigned by IEEE
   802, no registries are established for maintenance by the IANA.

5.  Security Considerations

   Since this document describes the use of RADIUS for purposes of
   authentication, authorization, and accounting in IEEE 802 networks,
   it is vulnerable to all of the threats that are present in other
   RADIUS applications.  For a discussion of these threats, see
   [RFC2607], [RFC2865], [RFC3162], [RFC3579], [RFC3580], and [RFC5176].
   In particular, when RADIUS traffic is sent in the clear, the
   attributes defined in this document can be obtained by an attacker




Aboba, et al.                Standards Track                   [Page 25]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


   snooping the exchange between the RADIUS client and server.  As a
   result, RADIUS confidentiality is desirable; for a review of RADIUS
   security and crypto-agility requirements, see [RFC6421].

   While it is possible for a RADIUS server to make decisions on whether
   to accept or reject an Access-Request based on the values of the
   WLAN-Pairwise-Cipher, WLAN-Group-Cipher, WLAN-AKM-Suite, WLAN-Group-
   Mgmt-Cipher, and WLAN-RF-Band Attributes, the value of doing this is
   limited.  In general, an Access-Reject should not be necessary,
   except where Access Points and Stations are misconfigured so as to
   enable connections to be made with unacceptable values.  Rather than
   rejecting access on an ongoing basis, users would be better served by
   fixing the misconfiguration.

   Where access does need to be rejected, the user should be provided
   with an indication of why the problem has occurred, or else they are
   likely to become frustrated.  For example, if the values of the WLAN-
   Pairwise-Cipher, WLAN-Group-Cipher, WLAN-AKM-Suite, or WLAN-Group-
   Mgmt-Cipher Attributes included in the Access-Request are not
   acceptable to the RADIUS server, then a WLAN-Reason-Code Attribute
   with a value of 29 (Requested service rejected because of service
   provider ciphersuite or AKM requirement) SHOULD be returned in the
   Access-Reject.  Similarly, if the value of the WLAN-RF-Band Attribute
   included in the Access-Request is not acceptable to the RADIUS
   server, then a WLAN-Reason-Code Attribute with a value of 11
   (Disassociated because the information in the Supported Channels
   element is unacceptable) SHOULD be returned in the Access-Reject.

6.  References

6.1.  Normative References

   [IEEE-802] IEEE, "IEEE Standard for Local and Metropolitan Area
              Networks: Overview and Architecture. Amendment 2:
              Registration of Object Identifiers", ANSI/IEEE Std 802,
              2001.

   [IEEE-802.11]
              IEEE, "IEEE Standard for Information technology -
              Telecommunications and information exchange between
              systems - Local and metropolitan area networks - Specific
              requirements Part 11:  Wireless LAN Medium Access Control
              (MAC) and Physical Layer (PHY) Specifications", IEEE Std
              802.11-2012, 2012.







Aboba, et al.                Standards Track                   [Page 26]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


   [IEEE-802.11ad]
              IEEE, "IEEE Standard for Information technology -
              Telecommunications and information exchange between
              systems - Local and metropolitan area networks - Specific
              requirements Part 11:  Wireless LAN Medium Access Control
              (MAC) and Physical Layer (PHY) Specifications, Amendment
              3: Enhancements for Very High Throughput in the 60 GHz
              Band", IEEE Std 802.11ad-2012, 2012.

   [IEEE-802.1X]
              IEEE, "IEEE Standard for Local and metropolitan area
              networks - Port-Based Network Access Control", IEEE Std
              802.1X-2010, February 2010.

   [ISO-639]  ISO, "Codes for the Representation of Names of Languages",
              ISO 639.

   [ISO-14962-1997]
              ISO, "Space data and information transfer systems - ASCII
              encoded English", 1997.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2865]  Rigney, C., Willens, S., Rubens, A., and W. Simpson,
              "Remote Authentication Dial In User Service (RADIUS)", RFC
              2865, June 2000.

   [RFC4072]  Eronen, P., Ed., Hiller, T., and G. Zorn, "Diameter
              Extensible Authentication Protocol (EAP) Application", RFC
              4072, August 2005.

   [RFC5247]  Aboba, B., Simon, D., and P. Eronen, "Extensible
              Authentication Protocol (EAP) Key Management Framework",
              RFC 5247, August 2008.

6.2.  Informative References

   [RFC2607]  Aboba, B. and J. Vollbrecht, "Proxy Chaining and Policy
              Implementation in Roaming", RFC 2607, June 1999.

   [RFC3162]  Aboba, B., Zorn, G., and D. Mitton, "RADIUS and IPv6", RFC
              3162, August 2001.

   [RFC3579]  Aboba, B. and P. Calhoun, "RADIUS (Remote Authentication
              Dial In User Service) Support For Extensible
              Authentication Protocol (EAP)", RFC 3579, September 2003.




Aboba, et al.                Standards Track                   [Page 27]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


   [RFC3580]  Congdon, P., Aboba, B., Smith, A., Zorn, G., and J. Roese,
              "IEEE 802.1X Remote Authentication Dial In User Service
              (RADIUS) Usage Guidelines", RFC 3580, September 2003.

   [RFC3748]  Aboba, B., Blunk, L., Vollbrecht, J., Carlson, J., and H.
              Levkowetz, Ed., "Extensible Authentication Protocol
              (EAP)", RFC 3748, June 2004.

   [RFC5176]  Chiba, M., Dommety, G., Eklund, M., Mitton, D., and B.
              Aboba, "Dynamic Authorization Extensions to Remote
              Authentication Dial In User Service (RADIUS)", RFC 5176,
              January 2008.

   [RFC6421]  Nelson, D., Ed., "Crypto-Agility Requirements for Remote
              Authentication Dial-In User Service (RADIUS)", RFC 6421,
              November 2011.

7.  Acknowledgments

   The authors would like to acknowledge Maximilian Riegel, Dorothy
   Stanley, Yoshihiro Ohba, and the contributors to the IEEE 802.1 and
   IEEE 802.11 reviews of this document, for useful discussions.





























Aboba, et al.                Standards Track                   [Page 28]

RFC 7268             RADIUS Attributes for IEEE 802            July 2014


Authors' Addresses

   Bernard Aboba
   Microsoft Corporation
   One Microsoft Way
   Redmond, WA 98052
   US

   EMail: bernard_aboba@hotmail.com


   Jouni Malinen

   EMail: j@w1.fi


   Paul Congdon
   Tallac Networks
   6528 Lonetree Blvd.
   Rocklin, CA 95765
   US

   Phone: +19167576350
   EMail: paul.congdon@tallac.com


   Joseph Salowey
   Cisco Systems

   EMail: jsalowey@cisco.com


   Mark Jones
   Azuca Systems

   EMail:  mark@azu.ca















Aboba, et al.                Standards Track                   [Page 29]


Html markup produced by rfcmarkup 1.109, available from https://tools.ietf.org/tools/rfcmarkup/