ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka stáhnout pdf (Strana 244)

Figure 10.8 illustrates the location of these various gateway types in a domestic

installation.

For a HomePlug device, the PLC gateway requires no specific configuration

compared to the other PLC devices of the network since HomePlug Turbo operates

in peer-to-peer mode. The specific nature of the PLC gateway results from the fact

that this device is connected to the Internet gateway and that all the outgoing IP

flows to the Internet go through this device.

The only HomePlug parameter to be specifically configured on the PLC gate-

way is the priority (CA0, CA1, CA2, and CA3 parameters specifying four priority

levels). Table 10.3 summarizes the characteristics of these priority levels for

HomePlug.

These eight priority classes are inherited from the description of the IEEE

802.1D standard classes by simplifying the eight 802.1D classes in four PLC classes.

To configure the values of CA priority parameters on the PLC gateway, simply

set the value to CA3 to allow prioritization of the incoming and outgoing traffic of

the PLC device that can be the bottleneck of the PLC network.

Insofar as the PLC configuration tools cannot be used for configuring this

parameter, I have developed a specific tool for the Windows operating system that

starts as an executable file. This program is available at the following address:

http://carcelle.fu8.com/ConfigurationPrioriteCPL.zip.

Configuring Security Parameters 225

Figure 10.6 Place of devices used for broadcasting IP telephony over the electrical home network

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ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka Strana 244