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Liaison statement
Potential RTGWG work related to the disaggregated BNG architecture

Additional information about IETF liaison relationships is available on the IETF webpage and the Internet Architecture Board liaison webpage.
State Posted
Submitted Date 2018-12-03
From Group rtgwg
From Contact Chris Bowers
To Contacts
Cc Deborah Brungard <>
Chris Bowers <>
Martin Vigoureux <>
Alvaro Retana <>
Routing Area Working Group Discussion List <>
Dave Sinicrope <>
Jeff Tantsura <>
Response Contact Chris Bowers <>
Jeff Tantsura <>
Purpose In response
Attachments (None)
Liaisons referred by this one The Disaggregated Architecture of BNG in BBF TR-384
Converged Core and single CUPS architecture
Liaisons referring to this one Follow-on response to IETF liaison: ‘Potential RTGWG work related to the disaggregated BNG architecture’
IESG follow-up regarding 'Potential RTGWG work related to the disaggregated BNG architecture'
The IETF has received two liaison statements from the BBF related to the
disaggregated architecture for the fixed network Broadband Network
Gateway described in TR-384.
( and

The Routing Area Working Group (RTGWG) within the Routing Area of the
IETF has been discussing a set of proposals for protocols to realize the
separation of control and user plane for the disaggregated BNG
architecture for fixed network subscribers.  We recognize that the
creation of protocol specifications to support the disaggregated BNG
architecture is important to the BBF.  RTGWG intends to evaluate these
proposals.  RTGWG may adopt one, both, or neither of these proposals as
starting points for RTGWG to produce specifications with the intention
of requesting publication by the IESG as RFCs.  In that context, we look
forward to coordinating with BBF as we progress this work.

The second liaison from the BBF discusses collaboration between the WWC
work area of the BBF and 3GPP to specify 5G Fixed Mobile Convergence.
It also discusses future work by the BBF to study the feasibility of
using a single protocol to allow multi-dimension inter-operability and
satisfy the requirements of both TR-384 and BBF FMC work.  We would
appreciate any additional information that the BBF can communicate
regarding these initiatives to provide additional architectural context
to guide IETF work in this area.

We would like to pursue a plan consistent with the intent of the BBF
expressed in the liaison statements referenced above.  We welcome
feedback and further dialog as the work of both organizations on this
topic progresses.