ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación descargar pdf (Pagina 267)

Network Architecture

In a company, there can be great differences in the architecture of a PLC network

according to the network size, to the number of stations to be connected, and to the

objectives assigned to the network.

The network architecture of a small company with a small number of PCs (less

than ten stations) and an Internet connection via a cable modem or ADSL does not

differ from the architecture of a home network.

The single possible options relate to the management of the functionalities of the

DHCP server, NAT router, and Internet connection via a dedicated gateway. Then,

it is still possible to add one or several PLC gateways by means of a switch in order

to build various PLC networks on the same electrical network.

Figure 11.1 illustrates an architecture in which the server acts as the DHCP

server and NAT router and where a switch is connected to it to make it possible to

add new PLC gateways for access to the architecture.

Most often, the PLC network comes along on top of an Ethernet network exist-

ing in a company that already has some functionalities, such as DHCP, the Internet

connection, and NAT.

Figure 11.2 illustrates a corporate network consisting of two subnets connected

to each other via a WAN (wide-area network) by means of routers. The routers are

themselves connected to the Ethernet network of each section of the corporate net-

work. The PLC networks used for connecting the terminals of the various company

rooms are connected to these Ethernet networks.

248 PLC for Businesses

Figure 11.1 Architecture of a PLC network with several PLC gateways connected to a switch

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ZyXEL Communications PLA-470 V2 - V3.0.5 Guía de instalación Pagina 267