ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka stáhnout pdf (Strana 195)

Iperf is used for generating any type of traffic between a client and a server. For

our test, illustrated in Figure 8.20, we use the following components:

•

An IBM R50e computer running under Windows XP SP2;

•

A DELL Latitude D600 computer running under FreeBSD 5.4;

•

Two PLC modems complying with the same technology (HomePlug 1.0,

Turbo, AV, and Spidcom 200) for each computer;

•

Two category 5 shielded FTP Ethernet cables;

•

A standard four-outlet power strip.

The client (192.168.1.100), the server (192.168.1.110), and the access point

(192.168.1.120) must be configured so as to have the same network address; failing

this, no communication can take place.

The test consists of generating a 100-Mb TCP traffic and in verifying the associ-

ated useful throughput according to the crossed network or to the mechanisms used.

Each value corresponds to the mean of three tests to ensure reliability by excluding

too high an oscillation.

In the server, all you have to do is to enter iperf −s in a MS-DOS window to initi-

ate the server. On the client side, the TCP transmission of 100 Mb is initiated by

entering iperf −c 192.168.1.110 −n 100000000 in a MS-DOS window.

176 Installation

Table 8.9 Useful Throughputs of Local Area Networks

NETWORK

THEORETICAL

DATA RATE

(Mbit/s)

USEFUL

THROUGHPUT

(Mbit/s)

Ethernet 10 10 8.08

Ethernet 100 100 90.06

HomePlug 1.0 14 5.1

HomePlug Turbo 85 40

HomePlug AV 200 150

Figure 8.20 Test configuration

1 2 ... 190 191 192 193 194 195 196 197 198 199 200 ... 348 349

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ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka Strana 195