Anritsu MD1230B-26, Руководство по эксплуатации, Страница: 16 / 102

Section 1 Overview
1-2
1.1 Product Overview
This option controls the MU120121A/22A modules installed in the main
unit and monitors the traffic on the PPPoE session. It can measure
throughput and delay by “session group”, which is a group of more than
one PPPoE sessions.
Measurement is performed by establishing a session first, generating
traffic, and disconnecting the session.
There are two types of measurement: manual where traffic is
started/stopped manually and auto where measurement is repeated
automatically. The user can switch the measurement method.
This option measures traffic for the following three types of network
topologies:
Note:
In this manual, the user flow from client to server is referred to as
“UpLink” and from server to client “DownLink.”
Network topology consisting of PPPoE client and PPPoE server
A PPPoE session is established between the PPPoE client and PPPoE
server. Traffic is measured by exchanging user data between client and
server using session information.
DSLAM
PPPoE session
ADSL
ADSL modem
PPPoE
Ethernet PPPoE Data
PPPoE
Ethernet PPPoE Data
PPPoE client PPPoE server
Fig. 1.1-1 Network topology consisting of PPPoE client and PPPoE server