Page 271 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

8 Requirements for networking resources

Typically, there are several types of networks involved in cloud computing services delivery and composition,
such as the intra-datacentre network and inter-datacentre network, as well as the access and core transport
network, etc.
To illustrate the cloud computing network concepts described in this Recommendation, a generic network
model, which supports cloud computing infrastructure, is shown in Figure 8-1.

Service access interface Resource abstractor and controller

Cloud management
Mobile user system
Remote user
Intra-datacentre Virtual
network datacentre Cloud infrastructure 1
Wireless
VPN Virtual Virtual
datacentre datacentre
Leased
line Network management Network management
Branch office system system

Access and core transport network Inter-datacentre network
Leased
line
Cloud management
system
xDSL
Intra-datacentre Virtual
Customer's datacentre network datacentre Cloud infrastructure 2

Home user Virtual Virtual
datacentre datacentre
Y.3510(13)_F8-1

Virtual machine cluster

Figure 8-1 – Generic network model for cloud infrastructure

The generic network model shown in Figure 8-1 consists of the following blocks:
1) Intra-datacentre network: The network connecting local cloud infrastructures, such as the
datacentre local area network used to connect servers, storage arrays and L4-L7 devices
(e.g., firewalls, load balancers, application acceleration devices).

2) Access and core transport network: The network used by CSCs to access and consume cloud
services deployed by the CSP.

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