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access point is the WPS registrar, the enrollee, or was not involved in the WPS handshake; a
rogue device must still associate with the access point to gain access to the network. Check the
MAC addresses of your wireless clients (usually printed on a label on the bottom of the device). If
there is an unknown MAC address you can remove it or reset the AP.
14.7.8
Vista as a WPS External Registrar
Use an Ethernet cable to connect a Windows Vista computer directly to one of the VDSL Router’s
Ethernet ports to let the computer give wireless settings to the VDSL Router and then later to
wireless clients using the WPS PIN method.
Figure 87
Windows Vista Computer Connected to a VDSL Router Ethernet Port
14.7.8.1
Vista Configuring the VDSL Router’s Wireless Settings
1
Go to the VDSL Router’s
Wireless > Security
screen and copy the VDSL Router’s identification
PIN.
2
In Windows Vista, go to your network connections and double-click the ZyXEL AP icon to open the
Windows Connect Now (WCN) screens.
3
Enter the VDSL Router’s identification PIN and click
Next
. The computer tells the VDSL Router what
wireless network settings to use.
14.7.8.2
Vista Adding and Authenticating Wireless Clients
After a Windows Vista computer configures the VDSL Router’s wireless settings, the same computer
can use WPS to add wireless clients to the network. The computer also authenticates them when
they connect to the wireless network.
1
In the wireless client’s configuration utility, select the option to use its PIN to add it to the wireless
network.
Note: After the wireless client starts WPS configuration, you have two minutes to enter
the PIN in the Windows Vista computer.
2
In the Windows Vista network connections, an icon for the wireless client displays. Double-click it,
enter the wireless client’s PIN, and click
Next
.
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3
The Windows Vista computer uses WPS to give the wireless client the wireless network’s settings.
After the wireless client’s wireless settings are configured, the Windows Vista computer
authenticates them whenever they connect to the wireless network.
4
After the WPS process finishes (the enrollee is able to access the VDSL Router) you can repeat
these steps to add more wireless clients one at a time.
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C
HAPTER
15
Diagnostic
15.1
Overview
The
Diagnostic
screens display information to help you identify problems with the VDSL Router.
The route between a CO VDSL switch and one of its CPE may go through switches owned by
independent organizations. A connectivity fault point generally takes time to discover and impacts
subscriber’s network access. In order to eliminate the management and maintenance efforts, IEEE
802.1ag is a Connectivity Fault Management (CFM) specification which allows network
administrators to identify and manage connection faults. Through discovery and verification of the
path, CFM can detect, analyze and isolate connectivity faults in bridged LANs.
15.1.1
What You Can Do in this Chapter
• The
Diagnostics
screen lets you test the VDSL Router’s connections (
Section 15.3 on page 200
).
• The
Fault Management
screen lets you perform CFM actions (
Section 15.4 on page 200
).
15.2
What You Need to Know
The following terms and concepts may help as you read through this chapter.
How CFM Works
A Maintenance Association (MA) defines a VLAN and associated Maintenance End Point (MEP) ports
on the device under a Maintenance Domain (MD) level. An MEP port has the ability to send
Connectivity Check Messages (CCMs) and get other MEP ports information from neighbor devices’
CCMs within an MA.
CFM provides two tests to discover connectivity faults.
Loopback test - checks if the MEP port receives its Loop Back Response (LBR) from its target
after it sends the Loop Back Message (LBM). If no response is received, there might be a
connectivity fault between them.
Link trace test - provides additional connectivity fault analysis to get more information on where
the fault is. If an MEP port does not respond to the source MEP, this may indicate a fault.
Administrators can take further action to check and resume services from the fault according to
the line connectivity status report.
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15.3
Diagnostics
Click
Wireless network > Classic configuration > Diagnostics
to open the screen shown next.
Use this screen to test the VDSL Router’s connections.
Figure 88
Diagnostics
• Click
Next Connection
to test the next WAN connection.
• Click
Test
to perform the test again.
• Click
Test With OAM F4
with to perform an OAM (Operation, Administration and Maintenance)
F4 loopback test on an ATM PVC.
Note: The DSLAM to which the VDSL Router is connected must also support OAM F4 to
use the OAM F4 loopback test.
15.4
802.1ag Connectivity Fault Management
Click
Wireless network > Classic configuration > Diagnostics > Fault Management
to open
the following screen. Use this screen to perform CFM actions.

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