Page 625 - Cloud computing: From paradigm to operation

XaaS 3

– It is recommended the NaaS CSP provide the CSC with an efficient management solution of
provisioned NaaS applications allowing to integrate the management of the provisioned NaaS
applications into the CSC's network operation environment.

7.3 Service chain
– It is recommended that NaaS CSP provides mechanisms allowing for the chaining of NaaS
applications, e.g., the required NaaS applications components and associated order.

7.4 Multiple IP addresses
– It is recommended that NaaS application support multiple IP addresses on a network interface when
it delivers network appliance functions (such as firewalls, load balancers).
NOTE – This requirement is also applicable to NaaS platform and NaaS connectivity.

8 Functional requirements of NaaS platform
This clause provides requirements of NaaS platform derived from the use cases described in Appendix II.

8.1 Programmable NaaS platform
– It is recommended that NaaS CSP supports deployment of network applications on NaaS platform
by both the CSP and the CSC.
– It is recommended that NaaS platform provides hardware or software modules specialized for
network function acceleration.
– It is recommended that NaaS platform assures and indicates performance available to the CSC's
applications which are running on it.
– It is recommended that NaaS platform service provides a modular software framework to select and
integrate networking functions, security functions and third party applications.
– It is recommended that NaaS CSP provides platform support for the CSC to manage (e.g., install,
upgrade or uninstall) CSC owned modules.
– It is recommended that NaaS platform provides network enablers for the CSC to initiate (e.g., design,
build, manage) and operate the flexible, scalable, functionally expandable networks.
– It is recommended that NaaS platform provides a unified control and management function over
distributed NaaS platforms for the CSC to change, move, or remove network enablers between NaaS
platforms.

8.2 Dynamic and flexible network services composition and steering
– It is recommended that NaaS CSP steers the CSC's traffic via service chain which is dynamically and
flexibly composed by customized sequences of NaaS applications on the NaaS platform according
to the CSC's specific service logic.

8.3 Isolation of service chains for tenants
– NaaS CSP can optionally support isolation of service chains for tenants, combining different network
services, implemented on the NaaS platform.

8.4 Flexible scaling of NaaS platform
– It is recommended that NaaS CSP assures flexible scaling of the resources assigned to the NaaS
platform to achieve performance objectives of the network services and applications implemented
on the Naas platform.
NOTE – This requirement is to meet the changes in services or applications utilization caused by e.g., growth
of traffic, change in number of users, adding new services, implementing new applications.

617