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Requirements for Roaming, Roaming Example

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G-1000 User's Guide Figure 15 Roaming Example The steps below describe the roaming process. 1 As wireless station Y moves from the coverage area of access point AP 1 to that of access point 2 AP 2, it scans and uses the signal of access point AP 2. 3 Access point AP 2 acknowledges the presence of wireless station Y and relays this information to access point AP 1 through the wired LAN. 4 Access point AP 1 updates the new position of wireless station. 5 Wireless station Y sends a request to access point AP 2 for reauthentication. 6.4.1 Requirements for Roaming The following requirements must be met in order for wireless stations to roam between the coverage areas. 1 All the access points must be on the same subnet and configured with the same ESSID. 2 If IEEE 802.1x user authentication is enabled and to be done locally on the access point, the new access point must have the user profile for the wireless station. 3 The adjacent access points should use different radio channels when their coverage areas overlap. 4 All access points must use the same port number to relay roaming information. 5 The access points must be connected to the Ethernet and be able to get IP addresses from a DHCP server if using dynamic IP address assignment. 56 Chapter 6 Wireless LAN

Section	Page
User’s Guide	1
Copyright	2
Federal Communications Commission (FCC) Interference Statement	3
Safety Warnings	5
ZyXEL Limited Warranty	6
Customer Support	7
Table of Contents	10
List of Figures	16
List of Tables	20
Preface	24
Getting to Know Your G-1000	26
1.1 Introducing the G-1000	26
1.2 G-1000 Features	26
1.2.1 Physical Features	26
1.2.2 Firmware Features	27
1.3 Applications for the G-1000	29
1.3.1 Internet Access Application	30
1.3.2 Corporation Network Application	30
Hardware Installation and Initial Setup	32
2.1 Front Panel of the G-1000	32
2.2 Top Panel and Connections of the G-1000	33
2.2.1 One 10/100M Ethernet Port	34
2.2.2 Power Port	34
2.2.3 The RESET Button	34
2.2.4 Antennas	35
2.3 Hardware Mounting Options	35
2.4 Additional Installation Requirements	35
2.5 Configuring Your G-1000	35
Introducing the Web Configurator	36
3.1 Accessing the G-1000 Web Configurator	36
3.2 Resetting the G-1000	37
3.2.1 Procedure To Use The Reset Button	37
3.2.2 Method of Restoring Factory-Defaults	38
3.3 Navigating the G-1000 Web Configurator	38
Wizard Setup	40
4.1 Wizard Setup Overview	40
4.1.1 Channel	40
4.1.2 ESS ID	40
4.1.3 WEP Encryption	40
4.2 Wizard Setup: General Setup	41
4.3 Wizard Setup: Wireless LAN	41
4.4 Wizard Setup: IP Address	43
4.4.1 IP Address Assignment	43
4.4.2 IP Address and Subnet Mask	43
4.5 Basic Setup Complete	45
System Screens	46
5.1 System Overview	46
5.2 Configuring General Setup	46
5.3 Configuring Password	47
5.4 Configuring Time Setting	48
Wireless LAN	50
6.1 Introduction	50
6.2 Wireless Security Overview	50
6.2.1 Encryption	50
6.2.2 Authentication	50
6.2.3 Restricted Access	51
6.2.4 Hide G-1000 Identity	51
6.2.5 Configuring Wireless LAN on the G-1000	51
6.3 Configuring the Wireless Screen	52
6.3.1 WEP Encryption	52
6.4 Configuring Roaming	55
6.4.1 Requirements for Roaming	56
6.5 MAC Filter	57
6.6 Introduction to WPA	59
6.6.1 WPA(2)-PSK Application Example	59
6.6.2 WPA(2) with RADIUS Application Example	60
6.6.3 Wireless Client WPA Supplicants	61
6.7 Configuring IEEE 802.1x and WPA	61
6.7.1 Authentication Required: 802.1x	62
6.7.2 Authentication Required: WPA	64
6.7.3 Authentication Required: WPA-PSK	65
6.7.4 Authentication Required: WPA2	66
6.7.5 Authentication Required: WPA2-PSK	67
6.8 Configuring RADIUS	68
IP Screen	70
7.1 TCP/IP Parameters	70
7.1.1 IP Address and Subnet Mask	70
7.1.2 WAN IP Address Assignment	70
7.2 Configuring IP	71
Remote Management Screens	72
8.1 Remote Management Overview	72
8.1.1 Remote Management Limitations	72
8.1.2 Remote Management and NAT	73
8.1.3 System Timeout	73
8.2 Configuring WWW	73
8.3 Configuring Telnet	74
8.4 Configuring TELNET	74
8.5 Configuring FTP	75
8.6 SNMP	76
8.6.1 Supported MIBs	78
8.6.2 SNMP Traps	78
8.6.3 SNMP Interface Index	79
8.6.4 Configuring SNMP	79
Log Screens	82
9.1 Configuring View Log	82
9.2 Configuring Log Settings	83
Maintenance	86
10.1 Maintenance Overview	86
10.2 System Status Screen	86
10.2.1 System Statistics	87
10.3 Association List	87
10.4 F/W Upload Screen	88
10.5 Configuration Screen	90
10.5.1 Backup Configuration	91
10.5.2 Restore Configuration	91
10.5.3 Back to Factory Defaults	93
10.6 Restart Screen	93
Introducing the SMT	94
11.1 Connect to your G-1000 Using Telnet	94
11.2 Changing the System Password	94
11.3 G-1000 SMT Menus Overview	95
11.4 Navigating the SMT Interface	96
General Setup	98
LAN Setup	100
13.1 LAN Setup	100
13.2 TCP/IP Ethernet Setup	100
13.3 Wireless LAN Setup	101
13.3.1 Configuring MAC Address Filter	103
13.3.2 Configuring Roaming	105
Dial-in User Setup	108
SNMP Configuration	110
System Security	112
16.1 System Password	112
16.2 Configuring External RADIUS Server	112
16.3 802.1x	114
System Information and Diagnosis	118
17.1 System Status	118
17.2 System Information	119
17.2.1 System Information	120
17.2.2 Console Port Speed	121
17.3 Diagnostic	121
Firmware and Configuration File Maintenance	124
18.1 Filename Conventions	124
18.2 Backup Configuration	125
18.2.1 Backup Configuration Using FTP	125
18.2.2 Using the FTP command from the DOS Prompt	126
18.2.3 Backup Configuration Using TFTP	127
18.2.4 Example: TFTP Command	128
18.2.5 Backup Via Console Port	128
System Maintenance and Information	130
19.1 Command Interpreter Mode	130
19.2 Time and Date Setting	131
19.3 Remote Management Setup	133
19.3.1 Telnet	133
19.3.2 FTP	133
19.3.3 Web	133
19.3.4 Remote Management Setup	133
19.3.5 Remote Management Limitations	134
19.4 Remote Management and NAT	135
19.5 System Timeout	135
Appendix A	136
Troubleshooting	136
Problems Starting Up the G-1000	136
Problems with the Ethernet Interface	136
Problems with the Password	137
Problems with Telnet	137
Problems with the WLAN Interface	137
Appendix B	138
Specifications	138
Hardware	138
Firmware	138
Appendix C	140
Brute-Force Password Guessing Protection	140
Example	140
Appendix D	142
Setting up Your Computer’s IP Address	142
Windows 95/98/Me	142
Windows 2000/NT/XP	145
Macintosh OS 8/9	149
Macintosh OS X	151
Appendix E	154
IP Address Assignment Conflicts	154
Case A: The G-1000 is using the same LAN and WAN IP addresses	154
Case B: The G-1000 LAN IP address conflicts with the DHCP client IP address	154
Case C: The Subscriber IP address is the same as the IP address of a network device	155
Case D: Two or more subscribers have the same IP address.	155
Appendix F	158
Wireless LANs	158
Wireless LAN Topologies	158
Channel	160
RTS/CTS	160
Fragmentation Threshold	161
Preamble Type	162
IEEE 802.1x	163
RADIUS	163
Types of Authentication	164
WPA(2)	166
Security Parameters Summary	167
Appendix G	170
IP Subnetting	170
IP Addressing	170
IP Classes	170
Subnet Masks	171
Subnetting	171
Example: Two Subnets	172
Example: Four Subnets	174
Example Eight Subnets	175
Subnetting With Class A and Class B Networks.	176
Appendix H	178
Command Interpreter	178
Command Syntax	178
Command Usage	178
Appendix I	180
Log Descriptions	180
Log Commands	181
Log Command Example	182
Appendix J	184
Antenna Selection and Positioning Recommendation	184
Antenna Characteristics	184
Types of Antennas For WLAN	184
Connector Type	185
Appendix K	186
Power Adaptor Specifications	186
Index	188
Numerics	188
A	188
B	188
C	188
D	188
E	189
F	189
G	189
H	189
I	189
L	189
M	190
N	190
O	190
P	190
Q	190
R	190
S	191
T	191
U	192
V	192
W	192