Page 627 - Cloud computing: From paradigm to operation

XaaS 3

9.7 Symmetric or asymmetric capacity

– It is recommended that NaaS CSP provides symmetric or asymmetric network link capacity based on
the CSC's demand.

9.8 Optimized and fine-grained traffic engineering
– It is recommended that NaaS CSP provides the CSC with fine-grained view on usage of network
resources.
– It is recommended that NaaS CSP collects near real time utilization metrics and topology data from
its own network equipment.
– It is recommended that NaaS CSP controls the network resource allocation by reconfiguring network
profiles as well as properties (e.g., topology, bandwidth) in response to dynamically changing traffic
demands.
– NaaS CSP can optionally provide centralized traffic management to achieve optimized traffic
engineering.

9.9 Coexistence with legacy network services and functions
– It is recommended that NaaS CSP avoids or mitigates possible performance and flexibility impacts
when introducing new network connectivity services.

– It is recommended that NaaS CSP supports coexistence of new network connectivity services with
legacy systems.

9.10 Centralized control view and abstraction view of resources
– NaaS CSP can optionally support logically centralized management and control view of the network
resources.

– NaaS CSP can optionally provide to the CSC an abstraction view of the underlying network resources.

9.11 CSC limited control of services
– It is recommended that NaaS CSP provides to the CSC appropriate services control in order to
respond to the time-sensitive performance requirements, including bandwidth quantities,
maximum latencies and other QoS parameters.

9.12 Logically isolated network partition
– NaaS CSP can optionally implement logically isolated network partition (LINP).
NOTE – LINP is described in [ITU-T Y.3011]. See clause 3.1.14.

9.13 Overlay network mechanism
– NaaS connectivity can optionally support virtual overlay networks on top of the physical underlay
network.

9.14 Overlapped private IP addresses
– It is recommended that NaaS CSP allows different CSCs to use their own private IP addresses even
when the subnet addresses are overlapped.

9.15 Interworking among different VPN solutions
– It is recommended that NaaS CSP supports interworking among different VPN technologies.

9.16 VPN connection in mobile environment
– It is recommended that NaaS CSP supports VPN connectivity in mobile environment.

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