1. Network Virtualization Overlays (NVO3) Working Group IETF 97, November 2016, Seoul
Chairs:
Secretary:
Sam Aldrin
Matthew Bocci
Ignas Bagdonas

2. Note Well
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3. Administrivia Blue Sheets! Note takers + Jabber Scribe? Jabber / XMPP
Mailing List:
General Discussion:
To Subscribe:
Archive:

4. Meeting Logistics First 40 mins will run like a “normal” IETF meeting
Final 50 mins will be roundtable session on some topics of importance to the working group
We are not yet sure how to best run this session. This is an experiment.
We have a second session on Thursday that we will use to report back on these sessions

5. Agenda – Wednesday 16th Nov
Welcome, Agenda Bashing, Status Update WG Chairs (15 min)
Update on VDP extensions for NVO3 – Pat Thaler (5 mins)
VXLAN YANG Data Model Fangwei Hu (10 min)
BFD for VXLAN Greg Mirsky (10 min)
Round table discussions (50min)

6. Agenda – Thursday 17th Nov
OAM Header for use in Overlay Networks Greg Mirsky (10 min)
On-demand Continuity Check (CC) and Connectivity Verification (CV) for Overlay Networks Greg Mirsky (10 min)
Report back on round table discussions WG Chairs (70 min)

7. WG Progress: Milestones
Done - Problem Statement submitted for IESG review
Done - Framework document submitted for IESG review
Publication requested - Architecture submitted for IESG review
Nov Use Cases submitted for IESG review
Aug Data Plane Solution submitted for IESG review
Sept Data Plane Requirements submitted for IESG review
Dec Control Plane Requirements submitted for IESG review
Dec Operational Requirements submitted for IESG review
Oct Security Requirements submitted for IESG review
Dec NVE - NVA Control Plane Solution submitted for IESG review
Dec End Device - NVE Control Plane Solution submitted for IESG review
Dec 2017 – OAM Solution submitted to IESG Review
Dec Recharter or close working group

8. Virtual interim Meeting – 26th October 2016
Virtual interim discussed next steps in data plane design
WG has adopted 3 data plane encapsulation drafts:
draft-ietf-nvo3-geneve-03
draft-ietf-nvo3-gue-04
draft-ietf-nvo3-vxlan-gpe-02
Very little technical progress made on these since adoption
Design team to take one of the three existing encapsulations and enhance it to address these concerns.
Output is standard track draft for adoption by working group
Existing three drafts could be forwarded to the IESG as informational after publication of NVO3 next-generation encapsulation
The single encapsulation should be viewed as one that the WG and industry can converge around for the future.
Charter posted to the list

9. Encapsulation Design Team Charter
NVO3 Encapsulation Design team 2016
Problem Statement
The NVO3 WG charter states that it may produce requirements for network virtualization data planes based on encapsulation of virtual network traffic over an IP-
based underlay data plane. Such requirements should consider OAM and security. Based on these requirements the WG will select, extend, and/or develop one or more data plane encapsulation format(s).
This has led to drafts describing three encapsulations being adopted by the working group:
- draft-ietf-nvo3-geneve-03
- draft-ietf-nvo3-gue-04
- draft-ietf-nvo3-vxlan-gpe-02
Discussion on the list and in face-to-face meetings has identified a number of technical problems with each of these encapsulations. Furthermore, there was clear consensus at the IETF meeting in Berlin that it is undesirable for the working group to progress more than one data plane encapsulation. Although consensus could not be reached on the list, the overall consensus was for a single encapsulation (RFC2418, Section 3.3). Nonetheless there has been resistance to converging on a single encapsulation format.
Design Team Goals
The design team should take one of the proposed encapsulations and enhance it to address the technical concerns. Backwards compatibility with the chosen encapsulation and the simple evolution of deployed networks as well as applicability to all locations in the NVO3 architecture are goals. The DT should specifically avoid a design that is burdensome on hardware implementations, but should allow future extensibility. The chosen design should also operate well with ICMP and in ECMP environments. If further extensibility is required, then it should be done in such a manner that it does not require the consent of an entity outside of the IETF.
Timeline
The design team should produce a first draft describing the proposal by end of January Target adoption by the WG by March 2017 IETF.

10. Document Status - 1
RFCs
RFC7364: Problem Statement: Overlays for Network Virtualization
RFC7365: Framework for Data Center (DC) Network Virtualization
No new RFCs since last IETF
RFC Editors Queue
draft-ietf-nvo3-arch-05

11. Document Status - 2 Requirements:
draft-ietf-nvo3-dataplane-requirements
Completed WG Last Call
draft-ietf-nvo3-nve-nva-cp-req-04
draft-ietf-nvo3-hpvr2nve-cp-req-02
Liasion to IEEE, pending update to VDP
draft-ietf-nvo3-security-requirements-07
Completed WGLC with inadequate feedback
Text should be used to define security considerations in solutions drafts
We plan to progress requirements in parallel with applicable solutions

12. Document Status - 3 Multicast Framework: draft-ietf-nvo3-mcast-fwk-05
Passed WG last call.
Awaiting shepherd’s write up
Use Cases:
draft-ietf-nvo3-use-case-12
Passed WG last call

13. Document Status - 3 Three WG documents on data plane encap solutions
draft-ietf-nvo3-vxlan-gpe-02
draft-draft-ietf-nvo3-geneve-03
draft-ietf-nvo3-gue-05
Adopted in IntArea WG: draft-ietf-nvo3-gue-05
These will be parked while the encapsulation design team completes its work

14. Roundtable Topics and Chairs
OAM
What is really important for encapsulation design team? Specific requirements on encapsulation and control plane. What OAM visibility is required E2E in NVO3 architecture
Greg Mirsky
Control Plane
What standardisation work do we need for NVE-NVA control plane and management plane? What are the protocol options? What is needed from YANG models vs. dynamic control protocols ?
Benson Schliesser
Data Plane
Extension options for NVO3 encapsulation. What is really needed?
Pat Thaler