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-01
Abstract
This document describes the interfaces and functionality of portable
socket objects, allocated and delegated using eBPF like Unix stacks,
across edge compute locations, per Unicast and Multicast Endpoint
Identifiers (EID). Each socket is used either as a queue, aggregating
upstream point to point and multipoint to point application frames,
or as a channel, transmitting point to multipoint and multipoint to
multipoint application frames. Portability of Unicast queue sockets
and Multicast channel sockets, as well as packet replication, is
achieved using the Locator/ID Separation Protocol (LISP).
Status of This Memo
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This Internet-Draft will expire on February 28,2023.
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Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . 4
3. Deployment Assumptions . . . . . . . . . . . . . . . . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . 4
5. Privacy Considerations . . . . . . . . . . . . . . . . . . . 4
6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 4
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
8. Normative References . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
This document describes the interfaces and functionality of portable
socket objects, allocated and delegated using eBPF like Unix stacks,
across edge compute locations, per Unicast and Multicast Endpoint
Identifiers (EID). Each socket is used either as a queue, aggregating
upstream point to point and multipoint to point application frames,
or as a channel, transmitting point to multipoint and multipoint to
multipoint application frames. Portability of Unicast queue sockets
and Multicast channel sockets, as well as packet replication, is
achieved using the Locator/ID Separation Protocol (LISP).
Distributed edge computing as well use of digital-twin constructs for
processing the physical world require new network based paradigms.
The basic dimensions of a digital-twin include: observable entity,
the instantiated digital entity, the connection between them,
the data models, raw and curated, and the services offered by digital
twins as an intermediate processing and data reduction nodes for
applications.
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In an open field like a city, unlike a closed factory, the scale and
variance between mostly active and mostly idle observable entities is
very high. Unlike testing facilities the connected sensors may be
moving, feeding one twin one moment, another the next. Such conditions
effect greatly the connection aspect of digital twins as the digital
entities may be delegated at any point to another location in order to
facilitate compute elasticity and recover from location disconnects.
Sensors of the observed entities as well as clients of digital-twins'
services may need to switch context often and quickly, as well as
maintain continuity if and when mobile access IP anchor is switched.
Portable queue and channel sockets help address these key issues.
Queue sockets assemble application frames from packets uploaded by
multiple EID sources using the LISP stack. They use a re-tunneling
router (RTR) configured in the socket upon instantiation/delegation.
Assembled frames are made available from kernel to user space logic
Using eBPF-Map[] type mechanisms.
Channel sockets use eBPF-Map[] type mechanisms to receive application
frames as well group address EID. These frames are segmented into
packets and transmitted using the LISP stack using the configured RTR
for delivery using LISP signal-free 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
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2. Definition of Terms
Based on [RFC9300][RFC9301]
PortableQueueEID: Is an EID addressable socket interface assembling
point to point and multipoint to point application frames to user
space clients from LISP packet interface.
PortableChannelEID: Is an EID addressable socket interface segmenting
point to multipoint and multipoint to multipoint application frames
from user space clients to LISP packet interface.
3. Deployment Assumptions
4. Security Considerations
The LISP overlay network is inherently secure and private.
All information is conveyed using provisioned sockets.
All traffic is carried over encrypted tunnels.
5. Privacy Considerations
Privacy and anti-tracking of observed entity sensors.
6. Acknowledgments
7. IANA Considerations
No IANA considerations.
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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, <https://www.rfc-editor.org/info/rfc9300>.
[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, <https://www.rfc-editor.org/info/rfc9301>.
[RFC8378] Farinacci, D., Moreno, V., "Signal-Free Locator/ID
Separation Protocol (LISP) Multicast", RFC8378,
DOI 10.17487/RFC8378, May 2018,
<https://www.rfc-editor.org/info/rfc8378>.
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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
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