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Dynamic and Static IP Addressing on the AP, Recovering an IP Address - manual

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2 Preparing to Install the Access Point Dynamic and Static IP Addressing on the 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, see "Configuring the Ethernet Interface" on page 31. 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 Unified Access Point on the same network, the IP address for each AP will be unique. Recovering an 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 82), or you can get a dynamically assigned address by connecting the AP to a network that has a DHCP server. Discovering a Dynamically Assigned IP Address 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 30. Using the Reset Button The reset button is located on the rear panel of the access point and is labeled Reset. Use the reset button to manually reboot the AP or to reset the AP back to the factory default settings, as Table 5 describes. Table 5. Reset Button Function Reboot Reset to factory defaults Action Press reset button for < 2 seconds Press and hold reset button for > 5 seconds Dynamic and Static IP Addressing on the AP 23

Section	Page
Unified Access Point (AP) Administrator’s Guide	1
Table of Contents	3
List of Figures	7
List of Tables	9
About This Document	11
Document Organization	11
Audience	11
Document Conventions	11
Online Help, Supported Browsers, and Limitations	12
Overview of the D-Link Access Point	15
Features and Benefits	16
IEEE Standards Support	16
Wireless Features	16
Security Features	17
Networking	17
Maintainability	17
Access Point Hardware	18
Preparing to Install the Access Point	19
Default Settings for the Unified Access Points	19
Administrator’s Computer Requirements	21
Wireless Client Requirements	22
Dynamic and Static IP Addressing on the AP	23
Recovering an IP Address	23
Discovering a Dynamically Assigned IP Address	23
Using the Reset Button	23
Installing the Access Point	25
Installing the Unified Access Point	25
Viewing Basic Settings	29
Using the CLI to View the IP Address	30
Configuring the Ethernet Interface	31
Using the Web UI to configure Ethernet Settings	31
Using the CLI to Configure Ethernet Settings	33
Configuring IEEE 802.1X Authentication	34
Using the Web UI to Configure 802.1X Authentication Information	35
Using the CLI to Configure 802.1X Authentication Information	36
Verifying the Installation	36
Configuring Access Point Security	39
Understanding Security on Wireless Networks	39
Choosing a Security Mode	39
Comparing Security Modes	40
When to Use Unencrypted (No Security)	40
When to Use Static WEP	40
When to Use IEEE 802.1X	41
When to Use WPA Personal	42
When to Use WPA Enterprise	42
Enabling Station Isolation	43
Configuring Virtual Access Point Security	43
None (Plain-text)	45
Static WEP	45
Static WEP Rules	48
Example of Using Static WEP	48
IEEE 802.1X	49
WPA Personal	50
WPA Enterprise	52
Prohibiting the SSID Broadcast	53
Managing the Access Point	55
Setting the Wireless Interface	55
Using the 802.11h Wireless Mode	57
Configuring Radio Settings	58
Configuring Virtual Access Points	62
Controlling Access by MAC Authentication	66
Configuring a MAC Filter List on the AP	66
Configuring MAC Authentication on the RADIUS Server	67
Configuring Load Balancing	68
Configuring Access Point Services	69
Configuring Quality of Service (QoS)	69
Understanding QoS	69
QoS and Load Balancing	69
802.11e and WMM Standards Support	70
QoS Queues and Parameters to Coordinate Traffic Flow	70
QoS Queues and Diff-Serve Code Points (DSCP) on Packets	70
EDCF Control of Data Frames and Arbitration Interframe Spaces	71
Random Backoff and Minimum / Maximum Contention Windows	72
Packet Bursting for Better Performance	73
Transmission Opportunity (TXOP) Interval for Client Stations	73
802.1p and DSCP tags	73
Configuring QoS Settings	75
Enabling the Network Time Protocol Server	79
Enabling or Disabling a Network Time Protocol (NTP) Server	80
Maintaining the Access Point	81
Managing the Configuration File	81
Resetting the Factory Default Configuration	82
Saving the Current Configuration to a Backup File	83
Restoring the Configuration from a Previously Saved File	83
Rebooting the Access Point	85
Upgrading the Firmware	85
Configuring the Access Point for Managed Mode	87
Transitioning Between Modes	87
Configuring Managed Access Point Settings	88
Viewing Managed AP DHCP Information	89
Viewing Access Point Status	91
Viewing Interface Status	91
Ethernet (Wired) Settings	92
Wireless Settings	92
Viewing Events Logs	92
Configuring Persistent Logging Options	93
Configuring the Log Relay Host for Kernel Messages	94
Example of Using Linux syslogd	94
Enabling or Disabling the Log Relay Host on the Events Page	95
Viewing Transmit and Receive Statistics	95
Viewing Client Association Information	97
Link Integrity Monitoring	98
Viewing Neighboring Access Points	98
Wireless Client Settings and RADIUS Server Setup	101
Accessing Wireless Client Security Settings	102
Configuring a Client to Access an Unsecure Network	104
Configuring Static WEP Security on a Client	104
Configuring WPA/WPA2 Personal on a Client	106
Using an External Authentication Server	108
Configuring IEEE 802.1X Security on a Client	108
IEEE 802.1X Client Using EAP/TLS Certificate	108
Configuring WPA/WPA2 Enterprise (RADIUS)	111
WPA/WPA2 Enterprise (RADIUS) Client Using EAP/PEAP	111
WPA/WPA2 Enterprise (RADIUS) Client Using EAP-TLS Certificate	113
Configuring the RADIUS Server for Authentication	116
Obtaining a TLS-EAP Certificate for a Client	119
Configuring the RADIUS Server for VLAN Tags	122
CLI for AP Configuration	125
How to Access the Access Point CLI	125
Telnet Connection to the AP	125
SSH Connection to the AP	126
Commands and Syntax	127
Using the get Command	128
Using the set Command	128
Using the add Command	129
Using the remove Command	129
Additional CLI Commands	130
Getting Help on Commands at the CLI	130
Tab Completion	130
Keyboard Shortcuts	131
Interface Naming Conventions	132
Saving Configuration Changes	133
Access Point CLI Commands	134
Configuring Basic Settings	134
Status	135
Ethernet Settings	136
Wireless Interface	137
Radio Settings	138
Virtual Access Points	139
Set Security to Static WEP	140
Set Security to IEEE 802.1X	142
Set Security to WPA/WPA2 Personal (PSK)	143
Set Security to WPA/WPA2 Enterprise (RADIUS)	144
Managed Access Point	146
IEEE 802.1X Supplicant Authentication	147
Quality of Service	147
Time	149
System Management	150
CLI Classes and Properties Reference	150

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Dynamic and Static IP Addressing on the AP

Preparing to Install the Access Point

Dynamic and Static IP Addressing on the 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, see

“Configuring the Ethernet

Interface”

on page 31.

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 Unified Access Point on the same network, the IP

address for each AP will be unique.

Recovering an 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 82), or you can get a dynamically assigned address by

connecting the AP to a network that has a

DHCP

server.

Discovering a Dynamically Assigned IP Address

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 30.

Using the Reset Button

The reset button is located on the rear panel of the access point and is labeled

Reset

. Use the

reset button to manually reboot the AP or to reset the AP back to the factory default settings,

Table 5

describes.

Table 5.

Reset Button

Function

Action

Reboot

Press reset button for < 2 seconds

Reset to factory defaults

Press and hold reset button for > 5 seconds