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, <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>.
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]