LISP Working Group S. Barkai Internet-Draft Fermi.io Intended status: Informational F. Maino Expires: March 28,2023 A. Rodriguez-Natal Cisco Systems A. Cabellos-Aparicio J. Paillisse Vilanova Technical University of Catalonia D. Farinacci lispers.net November 23, 2022 Portable Edge Multipoint Sockets draft-barkai-lisp-pems-03 Abstract This document describes the interfaces and functionality of portable multipoint socket objects. Each socket is instantiated per Unicast or Multicast Endpoint Identifiers(EID using eBPF like Unix stacks.Sockets are delegated and deployed across edge-compute locations for use as queues which assemble upstream point-to-point and multipoint-to-point application frames, or, as channels which segment point-to-multipoint and multipoint-to-multipoint application frames. Portability of queues and channels, traffic steering, multicast subscription and replication is delivered using the Locator/ID Separation Protocol (LISP). 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 February 28,2023. Barkai, et al. Expires March 28, 2023 [Page 1] Internet-Draft LISP November 2022 Copyright Notice Copyright (c) 2022 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 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . . 4 3. Deployment Assumptions . . . . . . . . . . . . . . . . . . . . 5 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 5. Privacy Considerations . . . . . . . . . . . . . . . . . . . . 6 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 6 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 8. Normative References . . . . . . . . . . . . . . . . . . . . . 7 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 8 1. Introduction This document describes the interfaces and functionality of portable multipoint socket objects. Each socket is instantiated per Unicast or Multicast Endpoint Identifiers(EID using eBPF like Unix stacks.Sockets are delegated and deployed across edge-compute locations for use as queues which assemble upstream point-to-point and multipoint-to-point application frames, or, as channels which segment point-to-multipoint and multipoint-to-multipoint application frames. Portability of queues and channels, traffic steering, multicast subscription and replication is delivered using the Locator/ID Separation Protocol (LISP). Distributed edge-computing and use of digital-twin constructs for processing physical world real-time data require new network based paradigms. The basic dimensions of a digital-twin constructs include: observable entity, instantiated digital entity, the connection between them, data models, raw and curated, and the services offered by twins as intermediate processing and data-reduction nodes. Barkai, et al. Expires March 28, 2023 [Page 2] Internet-Draft LISP November 2022 In an open field like a city, or a large network, and unlike a closed factory, the scale and variance between mostly active and mostly idle observable entities is very high. Unlike testing facilities, connected sensors of observed entities may be moving, observed virtual subnets may be moving between physical switches. Such connected sensors may be feeding one twin one moment, another the next. Dynamic conditions effect greatly the connection between the observed and the digital entities. Digital entities may be delegated at any point between edge locations in order to facilitate elasticity and recover from failures and disconnects. Sensors of observed entities and clients digital entities' services may need to switch context often and quickly, as well as maintain continuity when mobile access anchor is switched. Portable multipoint queues and channels address these key issues. Queue sockets assemble application frames from packets uploaded by multiple EID sources using the LISP stack. They remain reachable by using a re-tunneling router (RTR) configured in the socket upon instantiation and delegation. Assembled frames are made available from kernel to user space Using eBPF-Map[] type mechanisms. Channel sockets use eBPF-Map[] type mechanisms to receive application frames and group or theme EID. These frames are segmented into packets and transmitted using the LISP stack via their configured RTR for delivery using LISP signal-free (s,g) multicast [RFC8378]. Off-Peak Socket Allocation Packed on less locations _ _ _ _ / \/ \ / \/ \ ---- \_/\_/ \_/\_/ ---- Peak Socket Allocation / \/ \ / \/ \ ---- Spread across more compute locations \_/\_/ \_/\_/ ---- _ _ _ _ _ _ _ _ / \/ \ / \/ \ ---- / \/ \ / \/ \ / \/ \ / \/ \ ---- \_/\_/ \_/\_/ ---- \_/\_/ \_/\_/ \_/\_/ \_/\_/ ---- / \/ \ / \/ \ ---- / \/ \ / \/ \ / \/ \ / \/ \ ---- \_/\_/ \_/\_/ ---- \_/\_/ \_/\_/ \_/\_/ \_/\_/ ---- ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ Site Site Standby Site Site Site Site Standby Figure 1: Dynamic allocation of sockets per observed entities activity Barkai, et al. Expires March 28,2023 [Page 3] Internet-Draft LISP November 2022 2. Definition of Terms Based on [RFC9300][RFC9301] Edge Computing: a distributed computing paradigm that brings computation closer to the sources of data. This is expected to improve response times and save bandwidth. Programability of edge computing can be associated with Internet of Things (IOT) applications. Edge Traffic Steering: Traffic steering defines the different paths that application traffic can take to traverse the network. Destination zone is also determined by these paths. In edge computing traffic steering can be used for network-based service selection. Digital Twin: a digital representation of an intended or actual real-world physical product, system, or process (a physical twin) that serves as the effectively indistinguishable digital counterpart of it for practical purposes. PortableQueueEID: an EID-addressable socket interface assembling point to point and multipoint to point application frames to user space from the LISP packet interface. PortableChannelEID: an EID-addressable socket interface segmenting point to multipoint and multipoint to multipoint application frames from user space to the LISP packet interface. ObservedEntitySensorEID: the EID of a connected sensor which uploads data and media frames for digital-twin curation and processing. ClientEID: the EID of a client subscribed to a published digital twin service (EID Source, EID theme). Barkai, et al. Expires March 28,2023 [Page 4] Internet-Draft LISP November 2022 3. Deployment Assumptions (1) An application defines an EID addressing scheme to facilitate the connection between observed entities connected sensors and the digital entities tasked with representing them. (2) EIDs and RTRs assigned to ObservedEntitySensorEIDs, ClientEIDs. (3) EIDs and RTRs are assigned to instantiated PortableQueueEIDs and PortableChannelEIDs to facilitate data ingest processing and published services delivery. (4) ObservedEntitySensorEIDs, PortableQueueEIDs, PortableChannelEIDs are deployed across a LISP overlay network. Routing Locations (RLOC) of sensors and clients are determined by their current access anchor. Socket RLOCS are determined by the edge compute dev-ops instantiation and delegation procedures. (5) Based on RLOC dynamics at any given moment traffic is steered by LISP: from ObservedEntitySensorEIDs to PortableQueueEIDs, and from PortableChannelEIDs to subscribed ClientEIDs. Barkai, et al. Expires March 28,2023 [Page 5] Internet-Draft LISP November 2022 4. Security Considerations The LISP overlay network is inherently secure and private. All information is conveyed using provisioned sockets. Provisioned sockets EIDs and RLOCs configured in RTRs. All traffic may be carried over encrypted encapsulation. 5. Privacy Considerations Privacy and anti-tracking of observed entity sensors. Possible use of Ephemeral EIDs configured in RTRs. 6. Acknowledgments 7. IANA Considerations No IANA considerations. Barkai, et al. Expires March 28,2023 [Page 6] Internet-Draft LISP November 2022 8. Normative References [RFC9300] Farinacci, D., Fuller, V., Meyer, D., Lewis, D., and A. Cabellos, Ed., "The Locator/ID Separation Protocol (LISP)" , RFC 9300, DOI 10.17487/RFC9300, October 2022, . [RFC9301] Farinacci, D., Maino, F., Fuller, V., and A. Cabellos, Ed., "Locator/ID Separation Protocol (LISP) Control Plane", RFC 9301, DOI 10.17487/RFC9301, October 2022, . [RFC8378] Farinacci, D., Moreno, V., "Signal-Free Locator/ID Separation Protocol (LISP) Multicast", RFC8378, DOI 10.17487/RFC8378, May 2018, . Barkai, et al. Expires March 28,2023 [Page 7] Internet-Draft LISP November 2022 Authors' Addresses Sharon Barkai Fermi.io CA USA Email: sbarkai@gmail.com Alberto Rodriguez-Natal Cisco Systems 170 Tasman Drive San Jose, CA USA Email: natal@cisco.com Fabio Maino Cisco Systems 170 Tasman Drive San Jose, CA USA Email: fmaino@cisco.com Albert Cabellos-Aparicio Technical University of Catalonia Barcelona Spain Email: acabello@ac.upc.edu Jordi Paillisse-Vilanova Technical University of Catalonia Barcelona Spain Email: jordip@ac.upc.edu Dino Farinacci lispers.net San Jose, CA USA Email: farinacci@gmail.com Barkai, et al. Expires March 28,2023 [Page 8]