58 Software Networks
3.3. Software LANs
Looking again at the examples from the previous section, it is
possible to describe a software LAN. This is a local-area network
formed of different femto-datacenters in which the virtual machines
can be stored in memory to create these software LANs. Numerous
virtual machines such as routers, switches, firewalls or application
machines can be transported to the femto-datacenters from a central
Cloud or a local server. The decision to leave a machine in the central
or regional Cloud or to transport it to one of the femto-datacenters
depends on the characteristics of the application and on the evaluation
of the traffic that it could generate.
Figure 3.7 illustrates a scenario for a company that has several
boxes to create software LANs. In this case, to begin with, the
company’s Wi-Fi access points need to be transported to all of the
boxes, or else we need to select a number of virtual access points
corresponding to logical networks which, themselves, will be
constructed to serve specific applications, such as VoIP, IPTV, bank
access, messaging, file transfer, professional application, etc. The
software networks are established by the virtual machines that run in
the boxes. It is also possible to add a completely isolated network for
visitors to the company. This allows guests and visitors to connect to
the Internet, using the company’s network, with no risk of an attack.
The software networks can use all different protocols from one
another, including IPv4, IPv6, MPLS, Ethernet, SDN, etc. It is
necessary to choose the protocol which best suits the application for
which the data are being sent over the network.
The connections between the boxes may be hardwired or wireless,
using protocols corresponding to the type of network chosen by the
user. This may be OLSR, AODV, TRILL, or indeed any other
protocol developed in this field.
www.it-ebooks.info
3.3. Software LANs
Looking again at the examples from the previous section, it is
possible to describe a software LAN. This is a local-area network
formed of different femto-datacenters in which the virtual machines
can be stored in memory to create these software LANs. Numerous
virtual machines such as routers, switches, firewalls or application
machines can be transported to the femto-datacenters from a central
Cloud or a local server. The decision to leave a machine in the central
or regional Cloud or to transport it to one of the femto-datacenters
depends on the characteristics of the application and on the evaluation
of the traffic that it could generate.
Figure 3.7 illustrates a scenario for a company that has several
boxes to create software LANs. In this case, to begin with, the
company’s Wi-Fi access points need to be transported to all of the
boxes, or else we need to select a number of virtual access points
corresponding to logical networks which, themselves, will be
constructed to serve specific applications, such as VoIP, IPTV, bank
access, messaging, file transfer, professional application, etc. The
software networks are established by the virtual machines that run in
the boxes. It is also possible to add a completely isolated network for
visitors to the company. This allows guests and visitors to connect to
the Internet, using the company’s network, with no risk of an attack.
The software networks can use all different protocols from one
another, including IPv4, IPv6, MPLS, Ethernet, SDN, etc. It is
necessary to choose the protocol which best suits the application for
which the data are being sent over the network.
The connections between the boxes may be hardwired or wireless,
using protocols corresponding to the type of network chosen by the
user. This may be OLSR, AODV, TRILL, or indeed any other
protocol developed in this field.
www.it-ebooks.info