Page 273 - Cloud computing: From paradigm to operation

Framework and requirements for cloud computing 1

The intra-datacentre network requirements include:

• The intra-datacentre network is recommended to provide appropriate means to cope with flexible
network address space demands.
• The intra-datacentre network is recommended to provide elastic addressing for multi-tenant users.

• The intra-datacentre network is recommended to support different security policies for particular
virtual machines.
• The intra-datacentre network is recommended to support different QoS policies for particular
virtual machines.
• The intra-datacentre network is recommended to support the dynamic migration of virtual
machines.
• The intra-datacentre network is recommended to support the traffic monitoring among virtual
machines and network ports if needed.
• The intra-datacentre network is recommended to be able to provide multi-paths for particular multi-
tenant users.
• The intra-datacentre network is recommended to support the establishment of a logical network
among virtual machines.

• The intra-datacentre network is recommended to support public IP address and private IP address
mapping.

• The intra-datacentre network is recommended to support dynamic DNS and static DNS for multi-
tenant users.
• The intra-datacentre network is recommended to support network services (e.g., firewall, load
balancer, virtual private network (VPN) services) for multi-tenant users.

8.4 Inter-datacentre network

The inter-datacentre network is used to interconnect different cloud infrastructures. These infrastructures
may be owned by the same or different CSPs.

The inter-datacenter network requirements include:
• The inter-datacentre network is recommended to support the scalability to match the demand level
of public and private clouds.
• The inter-datacentre network is recommended to be resilient;
• The inter-datacentre network is recommended to deal with virtual machine network addresses
overlapping;
• The inter-datacentre network is recommended to support different logical networks.

9 Requirements for storage resources
This clause provides requirements for storage resources.
NOTE – An example of a reference model for storage resources is provided in Appendix I.

9.1 Storage space
The storage space requirement includes:
• It is required to support dynamic storage space expansion.

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