Dynamic and Static IP Addressing on the AP ......................................................................................... 16
Recovering an IP Address .................................................................................................................... 16
Discovering a Dynamically Assigned IP Address.................................................................................. 17
Installing the UAP ...................................................................................................................................... 17
Using the CLI to Configure 802.1X Authentication Information ............................................................ 24
Verifying the Installation ........................................................................................................................... 25
Configuring Security on the Wireless Access Point............................................................................... 26
Section 3: Viewing Access Point Status..........................................................................27
WPA Personal ....................................................................................................................................... 54
Creating a Management Access Control List .......................................................................................... 66
Section 5: Configuring Access Point Services .............................................................. 67
Configuring the Web Server Settings....................................................................................................... 67
Configuring SNMP on the Access Point................................................................................................... 68
Setting the SSH Status............................................................................................................................... 71
Setting the Telnet Status............................................................................................................................71
Configuring Quality of Service (QoS) ....................................................................................................... 72
Enabling the Network Time Protocol Server............................................................................................ 76
Creating a DiffServ Policy Map ................................................................................................................. 99
Client QoS Status ..................................................................................................................................... 101
Configuring a VAP ....................................................................................................................................116
VAP Configuration from the Web Interface .........................................................................................116
VAP Configuration from the CLI ..........................................................................................................117
VAP Configuration Using SNMP .........................................................................................................117
Configuring Radio Settings .....................................................................................................................119
Radio Configuration from the Web Interface .......................................................................................119
Radio Configuration from the CLI ........................................................................................................120
Radio Configuration Using SNMP .......................................................................................................121
Configuring the Wireless Distribution System ...................................................................................... 121
WDS Configuration from the Web Interface ........................................................................................121
WDS Configuration from the CLI .........................................................................................................123
WDS Configuration Using SNMP ........................................................................................................123
Table 29: Web Server Settings ........................................................................................................................ 68
Online help for the UAP Administration Web pages provides information about all fields and features available from the user
interface (UI). The information in the online help is a subset of the information available in the
Administrator’s Guide
Online help information corresponds to each page on the UAP Administration UI.
For information about the settings on the current page, click the link on the right side of a page or the More... link at
the bottom of the help panel on the UI.
The following figure shows an example of the online help available from the links on the user interface.
.
Unified Access Point
Figure 1: Administrator UI Online Help
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Section 2: Getting Started
The D-Link UAP provides continuous, high-speed access between wireless devices and Ethernet devices. It is an advanced,
standards-based solution for wireless networking in businesses of any size. The UAP enables wireless local area network
(WLAN) deployment while providing state-of-the-art wireless networking features.
The UAP can operate in two modes: Standalone Mode or Managed Mode. In Standalone Mode, the UAP acts as an
individual access point in the network, and you manage it by using the Administrator Web User Interface (UI), command-line
interface (CLI), or SNMP. In Managed Mode, the UAP is part of the D-Link Unified Access System, and you manage it by
using the D-Link Unified Switch. If an AP is in Managed Mode, the Administrator Web UI, Telnet, SSH, and SNMP services
are disabled.
This document describes how to perform the setup, management, and maintenance of the UAP in Standalone Mode. For
information about configuring the AP in Managed Mode by using the D-Link Unified Switch, see the
the switch.
Before you power on a new UAP, review the following sections to check required hardware and software components, client
configurations, and compatibility issues. Make sure you have everything you need for a successful launch and test of your
new or extended wireless network.
Administrator Guide
for
This section contains the following topics:
•Administrator’s Computer Requirements
•Wireless Client Requirements
•Dynamic and Static IP Addressing on the AP
•Installing the UAP
•Basic Settings
•Using the CLI to View the IP Address
•Configuring the Ethernet Settings
•Configuring IEEE 802.1X Authentication
•Verifying the Installation
•Configuring Security on the Wireless Access Point
To manage the UAP by using the Web interface or by using the CLI through Telnet or SSH, the AP needs an IP address. If
you use VLANs or IEEE 802.1X Authentication (port security) on your network, you might need to configure additional
settings on the AP before it can connect to the network.
Note: The WLAN AP is not designed to function as a gateway to the Internet. To connect your WLAN to other LANs
or the Internet, you need a gateway device.
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ADMINISTRATOR’S COMPUTER REQUIREMENTS
The following table describes the minimum requirements for the administrator’s computer for configuration and administration
of the UAP through a Web-based user interface (UI).
Table 2: Requirements for the Administrator’s Computer
Required Software or ComponentDescription
Serial or Ethernet Connection to the Access
Point
Wireless Connection to the NetworkAfter initial configuration and launch of the first access point on your new
Web Browser and Operating SystemConfiguration and administration of the UAP is provided through a Web-based
Security SettingsEnsure that security is disabled on the wireless client used to initially configure
The computer used to configure the first access point must be connected to
the access point by a serial cable or an Ethernet cable.
wireless network, you can make subsequent configuration changes through
the Administration Web pages using a wireless connection to the internal
network. For wireless connection to the access point, your administration
device will need Wi-Fi capability similar to that of any wireless client:
Portable or built-in Wi-Fi client adapter that supports one or more of the IEEE
802.11 modes in which you plan to run the access point.
Wireless client software configured to associate with the UAP.
user interface hosted on the access point. We recommend using one of the
following supported Web browsers to access the access point Administration
Web pages:
• Microsoft
for either major version) on Microsoft Windows
2000
• Netscape Mozilla 1.7.x on Redhat® Linux® version 2.4 or later
The administration Web browser must have JavaScript™ enabled to support
the interactive features of the administration interface.
the access point.
®
Internet Explorer® version 5.5 or 6.x (with up-to-date patch level
The UAP provides wireless access to any client with a properly configured Wi-Fi client adapter for the 802.11 mode in which
the access point is running. The UAP supports multiple client operating systems. Clients can be laptop or desktop computers,
personal digital assistants (PDAs), or any other hand-held, portable or stationary device equipped with a Wi-Fi adapter and
supporting drivers.
In order to connect to the access point, wireless clients need the software and hardware described in the following table.
Table 3: Requirements for Wireless Clients
Required ComponentDescription
Wi-Fi Client AdapterPortable or built-in Wi-Fi client adapter that supports one or more of the IEEE 802.11 modes
Wireless Client SoftwareClient software, such as Microsoft Windows Supplicant, configured to associate with the UAP.
Client Security SettingsSecurity should be disabled on the client used to do initial configuration of the access point.
in which you plan to run the access point. (IEEE 802.11a, 802.11b, 802.11g, and 802.11n
modes are supported.)
If the Security mode on the access point is set to anything other than plain text, wireless clients
will need to set a profile to the authentication mode used by the access point and provide a
valid username and password, certificate, or similar user identity proof. Security modes are
Static WEP, IEEE 802.1X, WPA with RADIUS server, and WPA-PSK.
For information about configuring security on the access point, see “Virtual Access Point
Settings” on page 46.
DYNAMICAND STATIC IP ADDRESSINGONTHE AP
When you power on the access point, the built-in DHCP client searches for a DHCP server on the network in order to obtain
an IP Address and other network information. If the AP does not find a DHCP server on the network, the AP continues to
use its default Static IP Address (10.90.90.91) until you re-assign it a new static IP address (and specify a static IP
addressing policy) or until the AP successfully receives network information from a DHCP server.
To change the connection type and assign a static IP address by using the CLI, see “Configuring the Ethernet Settings” on
page 22 or, by using the Web UI, see “Ethernet Settings” on page 37.
Caution! If you do not have a DHCP server on your internal network, and do not plan to use one, the first thing
you must do after powering on the access point is change the connection type from DHCP to static IP. You can
either assign a new static IP address to the AP or continue using the default address. We recommend assigning
a new static IP address so that if you bring up another WLAN AP on the same network, the IP address for each
AP will be unique.
RECOVERINGAN IP ADDRESS
If you experience trouble communicating with the access point, you can recover a static IP address by resetting the AP
configuration to the factory defaults (see “Resetting the Factory Default Configuration” on page 84), or you can get a
dynamically assigned address by connecting the AP to a network that has a DHCP server.
If you have access to the DHCP server on your network and know the MAC address of your AP, you can view the new IP
address associated with the MAC address of the AP.
If you do not have access to the DHCP server that assigned the IP address to the AP or do not know the MAC address of
the AP, you might need to use the CLI to find out what the new IP address is. For information about how to discover a
dynamically assigned IP address, see “Using the CLI to View the IP Address” on page 21.
INSTALLINGTHE UAP
To access the Administration Web UI, you enter the IP address of the AP into a Web browser. You can use the default IP
address of the AP (10.90.90.91) to log on to the AP and assign a static IP address, or you can use a DHCP server on you
network to assign network information to the AP. The DHCP client on the AP is enabled by default.
To install the UAP, use the following steps:
1. Connect the AP to an administrative PC by using a LAN connection or a direct-cable connection.
•To use a LAN connection, connect one end of an Ethernet cable to the network port on the access point and the
other end to the same hub where your PC is connected, as shown in the following figure.
The hub or switch you use must permit broadcast signals from the access point to reach all other devices on the
network.
•To use a direct-cable connection, connect one end of an Ethernet straight-through or crossover cable to the network
port on the access point and the other end of the cable to the Ethernet port on the PC, as shown in the following
figure. You can also use a serial cable to connect the serial port on the AP to a serial port on the administrative
computer.
For initial configuration with a direct Ethernet connection and no DHCP server, be sure to set your PC to a static IP
address in the same subnet as the default IP address on the access point. (The default IP address for the access point
is 10.90.90.91.)
If you use this method, you will need to reconfigure the cabling for subsequent startup and deployment of the access
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point so that the access point is no longer connected directly to the PC but instead is connected to the LAN (either by
using a hub or directly).
Note: It is possible to detect access points on the network with a wireless connection. However, we strongly
advise against using this method. In most environments you may have no way of knowing whether you are
actually connecting to the intended AP. Also, many of the initial configuration changes required will cause you
to lose connectivity with the AP over a wireless connection.
2. Connect the power adapter to the power port on the back of the access point, and then plug the other end of the power
cord into a power outlet.
3. Use your Web browser to log on to the UAP Administration Web pages.
-If the AP did not acquire an IP address from a DHCP server on your network, enter 10.90.90.91 in the address field
of your browser, which is the default IP address of the AP.
-If you used a DHCP server on your network to automatically configure network information for the AP, enter the new
IP address of the AP into the Web browser.
-If you used a DHCP server and you do not know the new IP address of the AP, use the following procedures to
obtain the information:
a. Connect a serial cable from the administrative computer to the AP and use a terminal emulation program to access
the command-line interface (CLI).
b. At the login prompt, enter admin for the user name and admin for the password. At the command prompt, enter get
management
-The command output displays the IP address of the AP. Enter this address in the address field of your browser. For
a more detailed explanation about how to log on to the CLI by using the console port, see
IP Address” on page 21.
4. When prompted, enter admin for the user name and admin for the password, then click OK.
“Using the CLI to View the
When you first log in, the Basic Settings page for UAP administration is displayed, as the following figure shows. This
page is also accessible from the Tools > Basic Settings menu.
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5. Verify the settings on the Basic Settings page.
•Review access point description and provide a new administrator password for the access point if you do not want to
use the default password, which is admin.
•Click the Update button to activate the wireless network with these new settings.
Note: The changes you make are not saved or applied until you click Update. Changing some access point
settings might cause the AP to stop and restart system processes. If this happens, wireless clients will
temporarily lose connectivity. We recommend that you change access point settings when WLAN traffic is low.
For more information about the fields and configuration options on the Basic Settings page, see “Basic Settings” on
page 20.
6. If you do not have a DHCP server on the management network and do not plan to use one, you must change the
Connection Type from DHCP to Static IP.
You can either assign a new Static IP address to the AP or continue using the default address. We recommend assigning
a new Static IP address so that if you bring up another UAP on the same network, the IP address for each AP will be
unique. To change the connection type and assign a static IP address, see “Configuring the Ethernet Settings” on
page 22 (CLI) or “Ethernet Settings” on page 37 (Web).
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7. If your network uses VLANs, you might need to configure the management VLAN ID or untagged VLAN ID on the UAP
in order for it to work with your network.
For information about how to configure VLAN information, see “Configuring the Ethernet Settings” on page 22 (CLI) or
“Ethernet Settings” on page 37 (Web).
8. If your network uses IEEE 802.1X port security for network access control, you must configure the 802.1X supplicant
information on the AP.
For information about how to configure the 802.1X user name and password, see “Configuring IEEE 802.1X
Authentication” on page 24.
BASIC SETTINGS
From the Basic Settings page, you can view various information about the UAP, including IP and MAC address information,
and configure the administrator password for the UAP. Tabl e 4 describes the fields and configuration options on the Basic
Settings page.
Table 4: Basic Settings Page
Field Description
IP AddressShows the IP address assigned to the AP. This field is not editable on this page because the IP
address is already assigned (either by DHCP, or statically through the Ethernet Settings page).
IPv6 AddressShows the IPv6 address assigned to the AP. This field is not editable on this page because the IP
IPv6 Link Local
Address
MAC AddressShows the MAC address of the AP. The address shown here is the MAC address associated with
Firmware VersionShows version information about the firmware currently installed on the AP. As new versions of the
Product IdentifierIdentifies the AP hardware model.
Hardware VersionIdentifies the AP hardware version.
Device NameGeneric name to identify the type of hardware.
Device DescriptionProvides information about the product hardware.
Current PasswordEnter the current administrator password. You must correctly enter the current password before you
New PasswordEnter a new administrator password. The characters you enter are displayed as bullet characters to
Confirm New
Password
address is already assigned (either by DHCPv6, or statically through the Ethernet Settings page).
Shows the IPv6 Link Local address, which is the IPv6 address used by the local physical link. The
link local address is not configurable and is assigned by using the IPv6 Neighbor Discovery process.
the management interface. This is the address by which the AP is known externally to other
networks.
WLAN AP firmware become available, you can upgrade the firmware on your APs.
are able to change it.
prevent others from seeing your password as you type.
The administrator password must be an alphanumeric string of up to 8 characters. Do not use
special characters or spaces.
Note:
As an immediate first step in securing your wireless network, we recommend that you
change the administrator password from the default.
Re-enter the new administrator password to confirm that you typed it as intended.
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Table 4: Basic Settings Page
Field Description
Baud RateSelect a baud rate for the serial port connection. The baud rate on the AP must match the baud rate
System NameEnter a name for the AP. This name appears only on the Basic Settings page and is a name to
System ContactEnter the name, e-mail address, or phone number of the person to contact regarding issues related
System LocationEnter the physical location of the AP, for example Conference Room A.
on the terminal or terminal emulator to connect to the AP command-line interface (CLI) by using a
serial (console) connection.
The following baud rates are available:
• 9600
• 19200
• 38400
• 57600
• 115200
identify the AP to the administrator. Use up to 64 alphanumeric characters, for example My AP.
to the AP.
CONNECTINGTOTHE AP WEB INTERFACEBY USINGTHE IPV6 ADDRESS
To connect to the AP by using the IPv6 global address or IPv6 link local address, you must enter the AP address into your
browser in a special format.
Note: The following instructions and examples work with Microsoft Internet Explorer 7 (IE7) and might not work
with other browsers.
To connect to an IPv6 global address, add square brackets around the IPv6 address. For example, if the AP global IPv6
address is 2520::230:abff:fe00:2420, type the following address into the IE7 address field: http://[2520::230:abff:fe00:2420].
To connect to the iPv6 link local address, replace the colons (:) with hyphens (-), add the interface number preceded with an
"s," then add ".ipv6-literal.net." For example, if the AP link local address is fe80::230:abff:fe00:2420, and the Windows
interface is defined as "%6," type the following address into the IE7 address field: http://fe80--230-abff-fe00-2420s6.ipv6literal.net.
USINGTHE CLI TO VIEWTHE IP ADDRESS
The DHCP client on the UAP is enabled by default. If you connect the UAP to a network with a DHCP server, the AP
automatically acquires an IP address. To manage the UAP by using the Administrator UI, you must enter the IP address of
the access point into a Web browser.
If a DHCP server on your network assigns an IP address to the UAP, and you do not know the IP address, use the following
steps to view the IP address of the UAP:
1. Using a null-modem cable, connect a VT100/ANSI terminal or a workstation to the console (serial) port.
If you attached a PC, Apple, or UNIX workstation, start a terminal-emulation program, such as HyperTerminal or
TeraTerm.
2. Configure the terminal-emulation program to use the following settings:
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•Baud rate: 115200 bps
•Data bits: 8
•Parity: none
•Stop bit: 1
•Flow control: none
3. Press the return key, and a login prompt should appear.
The login name is admin. The default password is admin. After a successful login, the screen shows the
(
Access Point Name
4. At the login prompt, enter get management.
Information similar to the following prints to the screen.
)# prompt.
CONFIGURINGTHE ETHERNET SETTINGS
The default Ethernet settings, which include DHCP and VLAN information, might not work for all networks.
By default, the DHCP client on the UAP automatically broadcasts requests for network information. If you want to use a static
IP address, you must disable the DHCP client and manually configure the IP address and other network information.
The management VLAN is VLAN 1 by default. This VLAN is also the default untagged VLAN. If you already have a
management VLAN configured on your network with a different VLAN ID, you must change the VLAN ID of the management
VLAN on the access point.
For information about using the Web interface to configure the Ethernet settings, see “Ethernet Settings” on page 37. You
can also use the CLI to configure the Ethernet settings, which the following section describes.
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USINGTHE CLI TO CONFIGURE ETHERNET SETTINGS
Use the commands shown in the following table to view and set values for the Ethernet (wired) interface. For more
information about each setting, see the description for the field in Table 12 on page 38.
Table 5: CLI Commands for Ethernet Setting
ActionCommand
Get the DNS Nameget host id
Set the DNS Nameset host id
For example:
set host id vicky-ap
Get Current Settings for the Ethernet (Wired) Internal
Interface
Set the management VLAN IDset management vlan-id
View untagged VLAN informationget untagged-vlan
Enable the untagged VLANset untagged-vlan status up
Disable the untagged VLANset untagged-vlan status down
Set the untagged VLAN IDset untagged-vlan vlan-id
View the connection typeget management dhcp-status
Use DHCP as the connection typeset management dhcp-client status up
Use a Static IP as the connection typeset management dhcp-client status down
Set the Static IP addressset management static-ip <ip_address>
Set a Subnet Maskset management static-mask
Set the Default
Gateway
View the DNS Nameserver mode Dynamic= up
Manual=down
Set DNS Nameservers to Use Static IP Addresses
(Dynamic to Manual Mode)
Set DNS Nameservers to Use DHCP IP Addressing
(Manual to Dynamic Mode)
get management
Example:
set management static-ip 10.10.12.221
Example:
set management static-mask 255.255.255.0
set static-ip-route gateway
Example:
set static-ip-route gateway 10.10.12.1
get host dns-via-dhcp
set host dns-via-dhcp down
set host static-dns-1 <ip_address>
set host static-dns-2 <ip_address>
Example:
set host static-dns-1 192.168.23.45
set host dns-via-dhcp up
<host_name>
<1-4094>
<1-4094>
<netmask>
<ip_address>
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In the following example, the administrator uses the CLI to set the management VLAN ID to 123 and to disable the untagged
VLAN so that all traffic is tagged with a VLAN ID.
D-Link-WLAN-AP# set management vlan-id 123
D-Link-WLAN-AP# set untagged-vlan status down
D-Link-WLAN-AP# get management
Property Value
------------------------------
vlan-id 123
interface brvlan123
static-ip 10.90.90.91
static-mask 255.0.0.0
ip 10.254.24.43
mask 255.255.248.0
mac 00:02:BC:00:14:E8
dhcp-status up
D-Link-WLAN-AP# get untagged-vlan
Property Value
---------------
vlan-id 1
status down
D-Link-WLAN-AP#
CONFIGURING IEEE 802.1X AUTHENTICATION
On networks that use IEEE 802.1X, port-based network access control, a supplicant (client) cannot gain access to the
network until the 802.1X authenticator grants access. If your network uses 802.1X, you must configure 802.1X authentication
information that the AP can supply to the authenticator.
If your network uses IEEE 802.1X see “Configuring 802.1X Authentication” on page 65 for information about how to configure
802.1X by using the Web interface.
USINGTHE CLI TO CONFIGURE 802.1X AUTHENTICATION INFORMATION
The following table shows the commands used to configure the 802.1X supplicant information using the CLI.
D-Link-WLAN-AP# set dot1x-supplicant status up
D-Link-WLAN-AP# set dot1x-supplicant user wlanAP
D-Link-WLAN-AP# set dot1x-supplicant password test1234
D-Link-WLAN-AP# get dot1x-supplicant
Property Value
---------------status up
user wlanAP
VERIFYINGTHE INSTALLATION
Make sure the access point is connected to the LAN and associate some wireless clients with the network. Once you have
tested the basics of your wireless network, you can enable more security and fine-tune the AP by modifying advanced
configuration features.
1. Connect the access point to the LAN.
•If you configured the access point and administrator PC by connecting both into a network hub, then your access
point is already connected to the LAN. The next step is to test some wireless clients.
•If you configured the access point by using a direct cable connection from your computer to the access point, do the
following procedures:
a. Disconnect the cable from the computer and the access point.
b. Connect an Ethernet cable from the access point to the LAN.
c. Connect your computer to the LAN by using an Ethernet cable or a wireless card.
2. Test LAN connectivity with wireless clients.
Test the UAP by trying to detect it and associate with it from some wireless client devices. For information about
requirements for these clients, see “Wireless Client Requirements” on page 16.
3. Secure and configure the access point by using advanced features.
Once the wireless network is up and you can connect to the AP with some wireless clients, you can add in layers of
security, create multiple virtual access points (VAPs), and configure performance settings.
Note: The WLAN AP is not designed for multiple, simultaneous configuration changes. If more than one
administrator is logged onto the Administration Web pages and making changes to the configuration, there is
no guarantee that all configuration changes specified by multiple users will be applied.
By default, no security is in place on the access point, so any wireless client can associate with it and access your LAN.
An important next step is to configure security, as described in “Virtual Access Point Settings” on page 46.
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CONFIGURING SECURITYONTHE WIRELESS ACCESS POINT
You configure secure wireless client access by configuring security for each virtual access point (VAP) that you enable. You
can configure up to 16 VAPs per radio that simulate multiple APs in one physical access point. By default, only one VAP is
enabled. For each VAP, you can configure a unique security mode to control wireless client access.
Each radio has 16 VAPs, with VAP IDs from 0-15. By default, only VAP 0 on each radio is enabled. VAP0 has the following
default settings:
•VLAN ID: 1
•Broadcast SSID: Enabled
•SSID: dlink1
•Security: None
•MAC Authentication Type: None
•Redirect Mode: None
All other VAPs are disabled by default. The default SSID for VAPs 1–15 is dlinkx where x is the VAP ID.
To prevent unauthorized access to the UAP, we recommend that you select and configure a security option other than None
for the default VAP and for each VAP that you enable.
For information about how to configure the security settings on each VAP, see “Virtual Access Point Settings” on page 46.
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Section 3: Viewing Access Point Status
This section describes the information you can view from the tabs under the Status heading on the navigation tree of the
UAP Web UI. This section contains the following subsections:
•Viewing Interface Status
•Viewing Events
•Viewing Transmit and Receive Statistics
•Viewing Associated Wireless Client Information
•Viewing Neighboring Access Points
•Viewing Managed AP DHCP Information
VIEWING INTERFACE STATUS
To monitor Ethernet LAN and wireless LAN (WLAN) settings, click the Interfaces tab.
Figure 2: Viewing Interface Status
This page displays the current settings of the UAP. It displays the Wired Settings and the Wireless Settings.
WIRED SETTINGS (INTERNAL INTERFACE)
The Internal interface includes the Ethernet MAC Address, Management VLAN ID, IP Address (IPv4 and IPv6), Subnet
Mask, and DNS information. If you want to change any of these settings, click the Edit link. After you click Edit, you are
redirected to the Ethernet Settings page.
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For information about configuring these settings, see “Configuring the Ethernet Settings” on page 22.
WIRELESS SETTINGS
The Radio Interface includes the Radio Mode and Channel. The Wireless Settings section also shows the MAC address
(read-only) associated with each radio interface.
If you want to change the Radio Mode or Channel settings, click the Edit link. After you click Edit, you are redirected to the
Wireless Settings page.
For information about configuring these settings, see “Wireless Settings” on page 40 and “Modifying Radio Settings” on
page 43.
VIEWING EVENTS
The Events page shows real-time system events on the AP such as wireless clients associating with the AP and being
authenticated.
To view system events, click the Events tab.
Figure 3: Viewing Events
From the Events page, you can view the most recent events generated by this AP and configure logging settings. You can
enable and configure persistent logging to write system event logs to non-volatile memory so that the events are not erased
when the system reboots. This page also gives you the option of enabling a remote log relay host to capture all system events
and errors in a Kernel Log.
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Note: The AP acquires its date and time information using the network time protocol (NTP). This data is reported
in UTC format (also known as Greenwich Mean Time). You need to convert the reported time to your local time.
For information on setting the network time protocol, see “Enabling the Network Time Protocol Server” on page 76.
CONFIGURING PERSISTENT LOGGING OPTIONS
If the system unexpectedly reboots, log messages can be useful to diagnose the cause. However, log messages are erased
when the system reboots unless you enable persistent logging.
Caution! Enabling persistent logging can wear out the flash (non-volatile) memory and degrade network
performance. You should only enable persistent logging to debug a problem. Make sure you disable persistent
logging after you finish debugging the problem.
To configure persistent logging on the Events page, set the persistence, severity, and depth options as described in Tab le 7,
and then click Update.
Figure 4: Persistent Logging Options
Table 7: Logging Options
FieldDescription
PersistenceChoose Enabled to save system logs to non-volatile memory so that the logs are not
SeveritySpecify the severity level of the log messages to write to non-volatile memory. For
DepthYou can store up to 128 messages in non-volatile memory. Once the number you
erased when the AP reboots. Choose Disabled to save system logs to volatile memory.
Logs in volatile memory are deleted when the system reboots.
example, if you specify 2, critical, alert, and emergency logs are written to non-volatile
memory. Error messages with a severity level of 3–7 are written to volatile memory.
• 0—emergency
• 1—alert
• 2—critical
• 3—error
• 4—warning
• 5—notice
• 6—info
• 7—debug
configure in this field is reached, the oldest log event is overwritten by the new log event.
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Note: To apply your changes, click Apply. Changing some settings might cause the AP to stop and restart system
processes. If this happens, wireless clients will temporarily lose connectivity. We recommend that you change AP
settings when WLAN traffic is low.
CONFIGURINGTHE LOG RELAY HOSTFOR KERNEL MESSAGES
The Kernel Log is a comprehensive list of system events (shown in the System Log) and kernel messages such as error
conditions, like dropping frames.
You cannot view kernel log messages directly from the Administration Web UI for an AP. You must first set up a remote server
running a syslog process and acting as a syslog log relay host on your network. Then, you can configure the UAP to send
syslog messages to the remote server.
Remote log server collection for AP syslog messages provides the following features:
•Allows aggregation of syslog messages from multiple APs
•Stores a longer history of messages than kept on a single AP
•Triggers scripted management operations and alerts
To use Kernel Log relaying, you must configure a remote server to receive the syslog messages. The procedure to configure
a remote log host depends on the type of system you use as the remote host.
Note: The syslog process will default to use port 514. We recommend keeping this default port. However; If you
choose to reconfigure the log port, make sure that the port number you assign to syslog is not being used by
another process.