Skip to main content

A syntax for the RADIUS Connect-Info attribute used in Wi-Fi networks
draft-grayson-connectinfo-09

Document Type Active Internet-Draft (radext WG)
Authors Mark Grayson , Joshua Redmore
Last updated 2026-05-19
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Formats
Additional resources Mailing list discussion
Stream WG state Candidate for WG Adoption
Document shepherd (None)
IESG IESG state I-D Exists
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)
draft-grayson-connectinfo-09
RADEXT Working Group                                          M. Grayson
Internet-Draft                                             Cisco Systems
Intended status: Informational                                J. Redmore
Expires: 20 November 2026                                      CableLabs
                                                             19 May 2026

 A syntax for the RADIUS Connect-Info attribute used in Wi-Fi networks
                      draft-grayson-connectinfo-09

Abstract

   This document describes a syntax for the Connect-Info attribute used
   with the RADIUS protocol, enabling RADIUS clients to provide RADIUS
   servers information pertaining to a user's connection with an IEEE
   802.11 wireless network.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 20 November 2026.

Copyright Notice

   Copyright (c) 2026 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 (https://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 Revised BSD License text as
   described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Revised BSD License.

Grayson & Redmore       Expires 20 November 2026                [Page 1]
Internet-Draft                Connect-Info                      May 2026

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Types of Connect-Info Metrics . . . . . . . . . . . . . . . .   4
   3.  ABNF syntax for Connect-Info  . . . . . . . . . . . . . . . .   5
   4.  Encoding Recommendations  . . . . . . . . . . . . . . . . . .   8
     4.1.  Access-Request  . . . . . . . . . . . . . . . . . . . . .   9
     4.2.  Accounting-Request  . . . . . . . . . . . . . . . . . . .   9
   5.  Implementations . . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  11
   Changelog . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  12
   Contributors  . . . . . . . . . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   The Connect-Info attribute is defined in [RFC2869] to enable a
   Network Access Server (NAS) to indicate to a RADIUS server "the
   nature of the user's connection".  [RFC2869] includes the
   recommendation that:

      The connection speed SHOULD be included at the beginning of the
      first Connect-Info attribute in the packet.  If the transmit and
      receive connection speeds differ, they MAY both be included in the
      first attribute with the transmit speed first (the speed the NAS
      modem transmits at), a slash (/), the receive speed, then
      optionally other information.

   The Connect-Info attribute can be sent in both Access-Request and
   Accounting-Request messages, as shown in Figure 1.

   +--------------------------------------------------------------+
   | Attribute | Request | Accept | Reject | Challenge | Acct-Req |
   +--------------------------------------------------------------+
   | Connect-  |   0-1   |   0    |   0    |     0     |    0+    |
   | Info (77) |         |        |        |           |          |
   +--------------------------------------------------------------+

   Figure 1: RFC2869 defined occurrence rules for Connect-Info attribute

Grayson & Redmore       Expires 20 November 2026                [Page 2]
Internet-Draft                Connect-Info                      May 2026

   Many NAS implementations have implemented the Connect-Info attribute.
   Wi-Fi vendors supporting the Connect-Info attribute start the text
   field with "CONNECT" that is followed by a floating point value
   representing the maximum connection speed in Mbps.  Implementations
   follow this with text information about the IEEE 802.11 amendment
   supported, as illustrated in Figure 2.

   Connect-Info = "CONNECT 11.00 Mbps 802.11b"

             Figure 2: Example #1 Wi-Fi Connect-Info attribute

   Other implementations have extended this baseline to signal
   additional information to the RADIUS server using a slash (/)
   delimiter, as illustrated in Figure 3.

   Connect-Info = "CONNECT 54.00 Mbps / 802.11n / RSSI: 53 / Channel: 1"

             Figure 3: Example #2 Wi-Fi Connect-Info attribute

   There are use-cases that benefit from being able to share Wi-Fi
   network connection metrics between a NAS and a RADIUS server,
   including where the NAS is operated by a Wi-Fi Access Network
   Provider (ANP) and the server is operated by an Identity Provider
   (IDP).  Reception of the Connect-Info attribute by a RADIUS server is
   intended to be used to assist the IDP in making authorization
   decisions.

   The rest of this document describes a syntax for the Connect-Info
   attribute that is simultaneously able to support existing Wi-Fi
   vendor implementations as illustrated in Figure 2 and Figure 3, while
   being enhanced with additional optional information to support new
   use-cases and requirements.

   The technique by which a RADIUS server uses the information encoded
   in the Connect-Info attribute to assist in making authorization
   decisions is not defined in this document.  Some servers may define
   the use a threshold for one or more parameters received in a RADIUS
   Access-Request, other systems may use historical Connect-Info records
   from previously authenticated sessions, including those in the RADIUS
   Accounting-Request messages received from the same NAS, still other
   systems may decide to algorithmically combine the parameters into a
   new metric used when making authorization decisions.

   The examples in Figure 2 and Figure 3 together with the
   recommendation in [RFC2869] are representations of complex data
   types, as described in section 3.2.3 of [RFC6158].  Whereas section
   3.2.4 of [RFC6158] discourages the use of complex data types where
   viable alternatives are available, it is argued that the present

Grayson & Redmore       Expires 20 November 2026                [Page 3]
Internet-Draft                Connect-Info                      May 2026

   document does not introduce a new complex data type, rather defines
   and extends the syntax widely used in existing implementations of the
   Connect-Info attribute that currently encode information using a
   complex data type.

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

1.2.  Terminology

   Access Network Provider (ANP):

      A Wi-Fi operator that has configured its Wi-Fi equipment to
      support inbound roaming of users.

   Identity Provider (IDP):

      An entity that authenticates end-user Wi-Fi devices onto ANP
      networks.

   Received Signal Strength Indicator (RSSI):

      A measurement of the power level that is received by an antenna
      from a wireless device.

2.  Types of Connect-Info Metrics

   The characteristics associated with the IEEE 802.11 connection that
   can be shared between NAS and RADIUS server include those that can be
   used to derive a quality metric of the performance of a Wi-Fi
   network.  These are:

   *  transmit and receive bit rates,

   *  received signal strength indicator (RSSI),

   *  frame loss rate,

   *  frame retry rate, and

   *  the Wi-Fi global operating class associated with the connection,
      as defined in [IEEE80211].

Grayson & Redmore       Expires 20 November 2026                [Page 4]
Internet-Draft                Connect-Info                      May 2026

   While not uniquely associated with a single IEEE 802.11 connection,
   Section 1 describes legacy implementations which include generic
   parameters concerning the configuration of the Wi-Fi network signaled
   in the Connect-Info attribute.  These legacy parameters are:

   *  the maximum Wi-Fi transmit rate,

   *  the Wi-Fi amendment [IEEE80211], and

   *  the Wi-Fi channel number.

3.  ABNF syntax for Connect-Info

   The Augmented Backus-Naur form (ABNF) is a syntax for specifications
   defined in [RFC5234].  The proposed ABNF syntax for the text of the
   Connect-Info attribute used with Wi-Fi networks is shown below.  This
   syntax is intended to encompass current vendor implementations,
   including parameter ordering, while supporting optional enhancements
   to support sharing of new parameters.

  ;---------------------------------------------------------------------
  ; Connect-Info RADIUS Attribute #77 Syntax for Wi-Fi networks
  ;---------------------------------------------------------------------

  connect-info-77   =  "CONNECT" [legacyAttributes]
                       *( DELIMITER keyValueAttribute )
                       [ DELIMITER legacyChannelNum ]
                       *( DELIMITER keyValueAttribute )

  ;---------------------------------------------------------------------
  ; Legacy attributes not linked to a specific connection
  ;---------------------------------------------------------------------

  legacyAttributes  =  1*SP MAXSPEED " Mbps" DELIMITER WIFIAMENDMENT
              ; An optional indication of max achievable data rate
              ; together with Wi-Fi 802.11 amendment information

  legacyChannelNum  = "Channel:" *SP CHANNUM
              ; An optional 802.11 channel number

  ;---------------------------------------------------------------------
  ; keyValueAttributes - attributes linked to a specific connection;
  ;---------------------------------------------------------------------

  keyValueAttribute =  "RSSI:" *SP SS ["(" AGGR ")"]
              ; The value of Station RSSI in dBm and optionally the
              ; aggregation technique use for reporting a value derived
              ; from multiple measurements

Grayson & Redmore       Expires 20 November 2026                [Page 5]
Internet-Draft                Connect-Info                      May 2026

  keyValueAttribute =/ "TxBitRate:" *SP RATE ["(" AGGR ")"]
              ; The AP to device transmission rate in Mbps and
              ; optionally the aggregation technique use for
              ; reporting a value derived from multiple measurements

  keyValueAttribute =/ "RxBitRate:" *SP RATE ["(" AGGR ")"]
              ; The device to AP transmission rate in Mbps and
              ; optionally the aggregation technique use for
              ; reporting a value derived from multiple measurements

  keyValueAttribute =/ "FrameLoss:" *SP PCT ["(" AGGR ")"]
              ; The AP to device 802.11 frame loss rate experienced,
              ; encoded as an integer percentage and optionally the
              ; aggregation technique use for reporting a value derived
              ; from multiple measurements

  keyValueAttribute =/ "FrameRetry:" *SP PCT ["(" AGGR ")"]
              ; The AP to device 802.11 frame retry rate experienced,
              ; encoded as an integer percentage and optionally the
              ; aggregation technique use for reporting a value derived
              ; from multiple measurements

  keyValueAttribute =/ "Global-OC:" *SP GOC
              ; Wi-Fi Global Operating Class as defined in IEEE 802.11
              ; Annex E

  ;---------------------------------------------------------------------
  ; keyValueAttributes - extensibility syntax.
  ;
  ; This syntax enables the syntax to be extended in the future.
  ;---------------------------------------------------------------------

  keyValueAttribute =/ 1*NO-DELIM-COLON ":"  *SP 1*NO-DELIM-COLON
              ; Syntax permitting extensibility

  ;---------------------------------------------------------------------
  ; Definitions for legacy attributes
  ;---------------------------------------------------------------------

  MAXSPEED         =  (DIGIT / (NZDIGIT DIGIT) / (NZDIGIT DIGIT DIGIT) /
                      (NZDIGIT DIGIT DIGIT DIGIT) /
                      (NZDIGIT DIGIT DIGIT DIGIT DIGIT)) "." DIGIT DIGIT
              ; Maximum AP to Device speed in Mbps, (0.00 - 99999.99),
              ; calculated as:
              ; SC * MD * CR * SS / (SYM + GD)
              ; where:
              ; SC  = Number of Data Sub-Carriers
              ; CR  = Coding Rate, e.g., 0.5 (BPSK),

Grayson & Redmore       Expires 20 November 2026                [Page 6]
Internet-Draft                Connect-Info                      May 2026

              ;       0.75 (256QAM)
              ; MD  = Modulation rate (1-8),
              ;       where 2^MD = num mod'n states
              ; SS  = number of spatial streams
              ; SYM = symbol interval (micro-seconds)
              ; GD  = guard interval (micro-seconds)

  WIFIAMENDMENT    =  "802.11" AMENDMENT

  AMENDMENT        =  "b" / "g" / "a" / "n" / "ac" / "ax" / "be"
              ; the original 802.11 amendment
              ; Note, whereas the industry has moved to define the use
              ; of Wi-Fi 4/5/6/7 terminology, the amendment is still
              ; used here to enable backwards compatibility with
              ; legacy implementations

  CHANNUM          =  NZDIGIT / (NZDIGIT DIGIT) / ("1" DIGIT DIGIT) /
                      ("2" U4DIGIT DIGIT)
              ; Encoding for Channel Numbers (1 - 249)
              ; Note - with the introduction of Wi-Fi operation in
              ; 6 GHz, the Channel Number no longer uniquely identifies
              ; the band of operation

  ;---------------------------------------------------------------------
  ; Definitions for connection orientated attributes
  ;---------------------------------------------------------------------

  SS               =  ["-"](DIGIT / (NZDIGIT DIGIT) / ("1" DIGIT DIGIT))
              ; Value of received signal strength expressed in dBm
              ; To accommodate different legacy implementations, both 41
              ; and -41 represent -41 dBm

  RATE             =  (DIGIT / (NZDIGIT DIGIT) / (NZDIGIT DIGIT DIGIT) /
                      (NZDIGIT DIGIT DIGIT DIGIT)) ["." DIGIT]
              ; A transmit or receive rate in Mbps

  GOC              =  NZDIGIT / (NZDIGIT DIGIT) / ("1" DIGIT DIGIT) /
                      ("2" U4DIGIT DIGIT) / ("2" U5DIGIT U5DIGIT)
              ; Encoding of Global Operating Class (1-255)

  PCT              =  DIGIT / (NZDIGIT DIGIT) / "100"
              ; Percentage (0 - 100)

  AGGR             =  ALGO SP ( WINDOW / WEIGHT )
              ; How multiple measurements are combined into a single
              ; reported value

  ALGO             =  "MIN" / "MAX" / ("AVG" "-" VARIANT ) / "ACC"

Grayson & Redmore       Expires 20 November 2026                [Page 7]
Internet-Draft                Connect-Info                      May 2026

              ; The algorithm used for combining multiple samples:
              ; MIN = minimum value over window
              ; MAX = maximum value over window
              ; AVG = average value over window or exponent
              ; ACC = accumulated ratio over window, corresponding to
              ; ( num[N] - num[1]) / ( denom[N] - denom[1] )
              ; and where ACC only applies to loss and retry rates

  VARIANT          =  "LIN" / "EXP"
              ; LIN = linear (arithmetic mean) average calculation
              ; EXP = exponential weighted average calculation

  WINDOW           =  (DIGIT / (NZDIGIT DIGIT) / (NZDIGIT DIGIT DIGIT))
                      TIMEUNIT
              ; The time window over which the algorithm operates,
              ; measured in units of TIMEUNIT

  WEIGHT           =  NZDIGIT
              ; The weighting of the AVG-EXP algorithm, where the
              ; exponential weight is 2^WEIGHT

  TIMEUNIT         =  "S" / "M"
              ; S = units of seconds, M = units of minutes

  DELIMITER        =  SLASH / 1*SP
              ; existing vendor delimiters

  NO-DELIM-COLON   = %x21-2e / %x30-39 / %x3b-7e
              ; any characters excluding delimiters - space (0x20) and
              ; slash (0x2f) - as well as colon (0x3a)

  SP               =  %x20
  SLASH            =  *SP %x2F *SP

  DIGIT            =  %x30-39 ; 0-9
  NZDIGIT          =  %x31-39 ; 1-9
  U4DIGIT          =  %x30-34 ; 0-4 (up to 4)

    Figure 4: ABNF definition for encoding of Connect-Info text field

4.  Encoding Recommendations

   Example encodings using the ABNF definition are illustrated in
   Figure 5 and Figure 6.  These illustrate that the metrics can be
   signaled while keeping the attribute size below 253 bytes.

Grayson & Redmore       Expires 20 November 2026                [Page 8]
Internet-Draft                Connect-Info                      May 2026

   If a RADIUS session is associated with a station operating using
   Multi-Link Operation (MLO), the Connect-Info attribute MAY include
   multiple instances of the Global-OC key-value attribute,
   corresponding to each operational link.

4.1.  Access-Request

   The inclusion of the above defined parameters in a Connect-Info
   attribute signaled in a RADIUS Access-Request message is restricted
   by the number of IEEE 802.11 frames over which the calculation are
   based.  In such cases, the transmit bit rates, receive bit rates and
   RSSI level may correspond to the instantaneous value of the specific
   parameter.  When signaling an instantaneous value, the "AGGR"
   definition SHOULD NOT be included in the reported Connect-Info
   attribute.

   Connect-Info = "CONNECT 54.00 Mbps / 802.11n / Channel: 1 / RSSI: 53"

   Connect-Info = "CONNECT 400.00 Mbps 802.11ac Channel:44 RSSI:50"

   Connect-Info = "CONNECT RSSI:56 TxBitRate:150.0 RxBitRate:150.0
                   Global-OC:116"

   Connect-Info = "CONNECT 400.00 Mbps 802.11ax RSSI:56 TxBitRate:150.0
                   RxBitRate:150.0 Global-OC:133"

      Figure 5: Example encodings of Connect-Info attribute in RADIUS
                           Access-Request message

4.2.  Accounting-Request

   The inclusion of the Connect-Info attribute signaled in a RADIUS
   Accounting-Request with Acct-Status-Type set to Start, may be
   restricted by the number of IEEE 802.11 frames over which the
   calculation are based.  In such cases, the transmit bit rates,
   receive bit rates and RSSI level MAY correspond to the instantaneous
   value of the specific parameter in which case the reporting with the
   "AGGR" definition SHOULD follow the rules introduced in Section 4.1.

   In other cases, i.e., where the Connect-Info attribute is signaled in
   RADIUS Accounting-Request messages with Acct-Status-Type set to
   Interim-Update or Stop, the NAS SHOULD use multiple measurements when
   calculating the reported value:

   *  the reported transmit and receive bit rates SHOULD represent the
      maximum values experienced since the last time the connect-info
      was signaled, i.e. the "ALGO" term SHOULD be set to "MAX".

Grayson & Redmore       Expires 20 November 2026                [Page 9]
Internet-Draft                Connect-Info                      May 2026

   *  the received signal strength indicator (RSSI) SHOULD represent the
      average RSSI value, where the average value calculated MAY be
      either a linear average or an exponential weighted average, i.e.
      the "ALGO" term SHOULD be set to "AVG".

   *  frame loss rate and frame retry rate SHOULD represent the
      accumulated ratio, i.e. the "ALGO" term SHOULD be set to "ACC".

   Connect-Info = "CONNECT RSSI:56(AVG-LIN 10M) TxBitRate:150.0(MAX 10M)
                   RxBitRate:150.0(MAX 10M)"

   Connect-Info = "CONNECT 400.00 Mbps 802.11ac RSSI:56(AVG-LIN 600S)
                   TxBitRate:150.0(MAX 600S) RxBitRate:150.0(MAX 600S)
                   FrameLoss:3(ACC 60S) FrameRetry:6(ACC 60S)"

   Connect-Info = "CONNECT TxBitRate:150.0(MAX 30S)
                   RxBitRate:120.5(MAX 30S) RSSI:-65(AVG-EXP 6)
                   FrameLoss:2(ACC 30S) FrameRetry:4(ACC 30S)
                   Global-OC:133"

      Figure 6: Example encodings of Connect-Info attribute in RADIUS
                        Accounting- Request message

5.  Implementations

   In July 2024, a proof of concept was built using modified hostapd
   code (https://w1.fi/) that is able to populate the connect-info
   attributes according to the syntax defined above.  In December 2024,
   Helium Network (www.helium.com) upgraded their deployment of 17,000
   OpenWi-Fi/OpenWRT Wi-Fi Access points to support the enhanced
   connect-info attribute.

6.  Security Considerations

   This document describes a syntax that enables a RADIUS client to
   provide a RADIUS server with information pertaining to the operation
   of an IEEE 802.11 wireless network, including connection metrics such
   as RSSI.

   While the Connect-Info attribute is intended to convey non-personal
   information, some metrics, particularly RSSI, can indirectly reveal
   information about the physical location or movement of an end user
   relative to the access point.  When combined with other data, such as
   access point locations, RSSI values may enable inference of the
   user's presence or proximity within a specific area, potentially
   raising privacy concerns.

Grayson & Redmore       Expires 20 November 2026               [Page 10]
Internet-Draft                Connect-Info                      May 2026

   Operators SHOULD consider the following when deploying and processing
   Connect-Info attributes:

   *  The terms agreed between the operator of the RADIUS client and the
      operator of the RADIUS server SHOULD include restrictions on the
      use, storage, and disclosure of connection metrics that may be
      privacy-sensitive, such as RSSI.

   *  The RADIUS server SHOULD limit use of these metrics to operational
      purposes, such as authorization decisions, and SHOULD NOT disclose
      information signaled in the Connect-Info attribute to any third
      party except where required by applicable law.

   *  Where possible, operators SHOULD avoid associating RSSI and
      similar metrics with persistent user identifiers, to minimize the
      risk of user tracking.

   *  Implementations SHOULD ensure that Connect-Info attributes are
      transmitted only over secure channels (e.g., using RADIUS secured
      with TLS), to protect against unauthorized interception.

7.  IANA Considerations

   This document has no IANA Actions.

8.  References

8.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/rfc/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/rfc/rfc8174>.

8.2.  Informative References

   [IEEE80211]
              IEEE, "Wireless LAN Medium Access Control (MAC) and
              Physical Layer (PHY) Specifications", n.d.,
              <https://standards.ieee.org/ieee/802.11/10548/>.

   [RFC2869]  Rigney, C., Willats, W., and P. Calhoun, "RADIUS
              Extensions", RFC 2869, DOI 10.17487/RFC2869, June 2000,
              <https://www.rfc-editor.org/rfc/rfc2869>.

Grayson & Redmore       Expires 20 November 2026               [Page 11]
Internet-Draft                Connect-Info                      May 2026

   [RFC5234]  Crocker, D., Ed. and P. Overell, "Augmented BNF for Syntax
              Specifications: ABNF", STD 68, RFC 5234,
              DOI 10.17487/RFC5234, January 2008,
              <https://www.rfc-editor.org/rfc/rfc5234>.

   [RFC6158]  DeKok, A., Ed. and G. Weber, "RADIUS Design Guidelines",
              BCP 158, RFC 6158, DOI 10.17487/RFC6158, March 2011,
              <https://www.rfc-editor.org/rfc/rfc6158>.

Changelog

   *  01 - Added extensibility to ABNF and corrected syntax.  Added
      security considerations section.  Added note on TxBitRate/
      RxBitRate when included in Accounting-Request type Stop.

   *  02 - Corrected ABNF syntax definition of RATE.

   *  03 - Following RADEXT recommendation, switched to independent
      submission.  Updated ABNF to ease parsing of key/value pairs.

   *  04 - Updated ABNF i) switching from band to global operating
      class, ii) added Wi-Fi Alliance generational name support as an
      alternative to 802.11 amendment designator, iii) permit legacy
      absolute and signed representations of signal strength, and iv)
      added WAN-RTT attribute

   *  05 - Following RADEXT recommendation, switched back to IETF
      submission.  Added clarifications that information is shared to
      enable a RADIUS server to make improved authorization decisions.
      Added text about aligning with legacy implementations that do not
      adhere to RFC6158.

   *  06 - Following RADEXT feedback at IETF 124, removed non-connection
      orientated key-value pairs from the syntax definition.

   *  07 - Updated the ABNF following feedback from Iegor Sergieienkov.

   *  08 - Corrected missing exponential weight in ABNF and updated
      security section to deal with RSSI/location.

   *  09 - Re-introduced connection related Global Operating Class

Acknowledgements

   The authors would like to thank all the members of the WBA's Access
   Network Metrics project team, as well as Iegor Sergieienkov, who have
   helped review and refine the Connect-Info syntax.

Grayson & Redmore       Expires 20 November 2026               [Page 12]
Internet-Draft                Connect-Info                      May 2026

Contributors

   Sri Gundavelli
   Cisco Systems
   170 West Tasman Drive
   San Jose,  95134
   United States of America
   Email: sgundave@cisco.com

   Bruno Tomas
   Wireless Broadband Alliance
   5000 Executive Parkway, Suite 302
   San Ramon,  94583
   United States of America
   Email: bruno@wballiance.com

   Michael Sym
   Single Digits
   4 Bedford Farms Drive, Suite 210
   Bedford,  1608
   United States of America
   Email: msym@singledigits.com

   Blair Bullock
   Boldyn Networks
   Pleasanton,
   United States of America
   Email: blair.bullock@boldyn.com

   Joey Padden
   Helium
   Boulder,
   United States of America
   Email: jpadden@helium.com

Authors' Addresses

   Mark Grayson
   Cisco Systems
   10 New Square Park
   Feltham
   TW14 8HA
   United Kingdom

Grayson & Redmore       Expires 20 November 2026               [Page 13]
Internet-Draft                Connect-Info                      May 2026

   Email: mgrayson@cisco.com

   Joshua Redmore
   CableLabs
   858 Coal Creek Cr.
   Louisville,  80027
   United States of America
   Email: j.redmore@cablelabs.com

Grayson & Redmore       Expires 20 November 2026               [Page 14]