TR-124 – Functional Requirements
for Broadband Residential Gateway
Devices 
Issue: 8
Issue Date: December 2022
Table of Contents 
List of Figures 
- WPS pushbutton method state machine
- WAN PPPoE automated connection flow
- WAN IPv6 automated connection flow
- Receive router advertisement subroutine flow
- Upstream Queuing and Scheduling Example for RG
- Example: No WAN Connection Configuration
- Example: Router Sets Up PPPoE to an ISP
- Example: PC3 sets up its own PPPoE Session
- Example: Router sets up a Second PPPoE Session
- Example: Router in 2684 Bridged Mode with DHCP Server On
- Example: Router in Bridged Mode with DHCP Server On
- Example: Router in Bridged Mode with DHCP Server off
- Example: Single PC Mode of Operation
- Example: Example: Router in Routed 2684 Mode
- Example: Router sets up Second IP Connection
- Example: Managed Bridge Configuration
- Example: Unmanaged Bridge Configuration
- Sealing current reference design
List of Tables 
Notice 
The Broadband Forum is a non-profit corporation organized to create guidelines for broadband network system development and deployment. This Technical Report has been approved by members of the Forum. This Technical Report is subject to change. This Technical Report is owned and copyrighted by the Broadband Forum, and all rights are reserved. Portions of this Technical Report may be owned and/or copyrighted by Broadband Forum members.
Intellectual Property 
Recipients of this Technical Report are requested to submit, with their comments, notification of any relevant patent claims or other intellectual property rights of which they may be aware that might be infringed by any implementation of this Technical Report, or use of any software code normatively referenced in this Technical Report, and to provide supporting documentation.
Terms of Use 
1. License
Broadband Forum hereby grants you the right, without charge, on a perpetual, non-exclusive and worldwide basis, to utilize the Technical Report for the purpose of developing, making, having made, using, marketing, importing, offering to sell or license, and selling or licensing, and to otherwise distribute, products complying with the Technical Report, in all cases subject to the conditions set forth in this notice and any relevant patent and other intellectual property rights of third parties (which may include members of Broadband Forum). This license grant does not include the right to sublicense, modify or create derivative works based upon the Technical Report except to the extent this Technical Report includes text implementable in computer code, in which case your right under this License to create and modify derivative works is limited to modifying and creating derivative works of such code. For the avoidance of doubt, except as qualified by the preceding sentence, products implementing this Technical Report are not deemed to be derivative works of the Technical Report.
2. NO WARRANTIES
THIS TECHNICAL REPORT IS BEING OFFERED WITHOUT ANY WARRANTY WHATSOEVER, AND IN PARTICULAR, ANY WARRANTY OF NONINFRINGEMENT AND ANY IMPLIED WARRANTIES ARE EXPRESSLY DISCLAIMED. ANY USE OF THIS TECHNICAL REPORT SHALL BE MADE ENTIRELY AT THE USER’S OR IMPLEMENTER’S OWN RISK, AND NEITHER THE BROADBAND FORUM, NOR ANY OF ITS MEMBERS OR SUBMITTERS, SHALL HAVE ANY LIABILITY WHATSOEVER TO ANY USER, IMPLEMENTER, OR THIRD PARTY FOR ANY DAMAGES OF ANY NATURE WHATSOEVER, DIRECTLY OR INDIRECTLY, ARISING FROM THE USE OF THIS TECHNICAL REPORT, INCLUDING BUT NOT LIMITED TO, ANY CONSEQUENTIAL, SPECIAL, PUNITIVE, INCIDENTAL, AND INDIRECT DAMAGES.
3. THIRD PARTY RIGHTS
Without limiting the generality of Section 2 above, BROADBAND FORUM ASSUMES NO RESPONSIBILITY TO COMPILE, CONFIRM, UPDATE OR MAKE PUBLIC ANY THIRD PARTY ASSERTIONS OF PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS THAT MIGHT NOW OR IN THE FUTURE BE INFRINGED BY AN IMPLEMENTATION OF THE TECHNICAL REPORT IN ITS CURRENT, OR IN ANY FUTURE FORM. IF ANY SUCH RIGHTS ARE DESCRIBED ON THE TECHNICAL REPORT, BROADBAND FORUM TAKES NO POSITION AS TO THE VALIDITY OR INVALIDITY OF SUCH ASSERTIONS, OR THAT ALL SUCH ASSERTIONS THAT HAVE OR MAY BE MADE ARE SO LISTED.
All copies of this Technical Report (or any portion hereof) must include the notices, legends, and other provisions set forth on this page.
Issue History 
Issue Number | Approval Date | Issue Editor | Changes |
---|---|---|---|
Issue 1 | December 2006 |
|
|
Issue 2 | May 2012 |
|
|
Issue 3 | August 2012 |
|
|
Issue 4 | October 2014 |
|
|
Issue 5 | August 2016 |
|
|
Issue 6 | November 2020 |
|
|
Issue 7 | December 2021 |
|
|
Issue 8 | December 2022 |
|
|
Broadband User Services Work Area Directors 
- Jason Walls, QA Cafe
- John Blackford, CommScope