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Team

Patrick.Liu@huawei.com

Overview

ACTN refers to the set of virtual network operations needed to
orchestrate, control and manage large-scale multi-domain TE networks
so as to facilitate network programmability, automation, efficient
resource sharing, and end-to-end virtual service aware connectivity
and network function virtualization services.

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The MDSC istheonlybuilding block of thearchitecture thatis athatisa
ble to implement all the four ACTN main functionalities, i.e. multi
domain coordination function, virtualization/abstraction function,
customer mapping function and virtual service coordination. The key
point of the MDSC and the whole ACTN framework is detaching the
network and service control from underlying technology and help
customer express the network as desired by business needs. The MDSC
envelopes the instantiation of right technology and network control
to meet business criteria. In essence it controls and manages the
primitives to achieve functionalities as desired by CNC
A hierarchy of MDSCs can be foreseen for scalability and
administrative choices. In order to allow for a hierarchy of MDSC,
the interface between the parent MDSC and a child MDSC must be th
e same as the interface between the MDSC and the PNC. This does not
introduce any complexity as it is transparent from the perspec
tive of the CNCs and the PNCs and it makes use of the same interfac
e model and its primitives as the CMI and MPI.

A key requirement for allowing recursion of MDSCs is that a single
interface needs to be defined both for the north and the south
bounds. In order to allow for multi-domain coordination a
1:N relationship must be allowed between MDSCs and between MDSCs and PNCs
(i.e. 1 parent MDSC and N child MDSC or 1 MDSC and
N PNCs). In addition to that it could be possible to have also a M:1 relationship
between MDSC and PNC to allow for network resource partitioning/
sharing among different customers not necessarily connected to the
same MDSC (e.g. different serviceproviders).

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The PhysicalNetwork Controller is the one in charge of configuring
the network elements, monitoring the physical topology of the
network and passing andpassing it, either raw orabstracted, to the MDSC.

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• ACTN Requirements https://datatracker.ietf.org/doc/draft-ietf-teas-actn-requirements/
• ACTN Framework https://datatracker.ietf.org/doc/draft-ceccarelli-teas-actn-frameworkframewo

• rk/

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Impl

ementing ACTN in ONOS

via Yang (RestConf / gRPC etc)

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