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Problems with Date and Time, Discovery Problems with Access Points, Connection Problems

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Troubleshooting Problems with Date and Time The DATE AND TIME page shows the current date and time of day. The wireless controller uses the Network Time Protocol (NTP) to obtain the current time from one of several network time servers on the Internet. Each entry in the log is stamped with the date and time of day. If you find that the date and time stamps are not accurate, confirm that the wireless controller can reach the Internet. Discovery Problems with Access Points If the wireless controller does not discover any or all access points: • Be sure the wireless controller is connected to the LAN (see "LAN Port LEDs Not ON" on page 212). • Be sure you entered the appropriate IP address range if the access points operate in different VLANs, reside behind an IP subnet, or operate in standalone mode (see "Basic Configuration Step #1. Enable DHCP Server (Optional)" on page 32). • If you are using a firewall, unblock the UDP port number for each access port in the firewall. • Be sure each access point is using a unique IP address (see "IP Discovery" on page 166). If more than one access point has the same IP address, only one of them is discovered. In this case, add the access point to the managed list, change its IP address, and then run discovery again to discover the next access point with that IP address (see "Basic Configuration Step #2. Select the Access Points to be Managed" on page 33. Connection Problems When an access point is converted from standalone mode to managed mode, its static IP address changes to an IP address that is issued by the DHCP server, either one in the network or one that is configured on the wireless controller. This occurs to ensure that each managed access point has a unique IP address. If there is no DHCP server or if the access point cannot reach the DHCP server, the access point remains in the Connecting state as it tries to obtain an IP address. If there is no DHCP server in the network, configure one on the wireless controller (see "Basic Configuration Step #1. Enable DHCP Server (Optional)" on page 32). When a DHCP server becomes available, the access point can transition from the Connecting state to the Connected state. 214 DWC-1000 Wireless Controller User's Guide

Section	Page
Front Page	1
Contents	2
Preface	7
Audience	7
Document Revision Level	8
Changes in this Revision	8
Related Documents	8
Document Conventions	9
Safety and Warnings	9
Typographic Conventions	9
1. Product Overview	10
Features and Benefits	11
Scalable architecture with stacking and redundancy	11
Centralized management and configuration	11
Security	11
2. Unpacking and Installation	12
Unpacking	13
Package Contents	13
Required Tools and Information	13
Selecting a Location	14
Front Panel Ports and LEDs	15
Rear Panel	17
Using the Reset Button	17
Bottom Panel (Default IP Address)	18
Licenses	18
Installing the Wireless Controller	18
Rack-Mounting the Wireless Controller	18
Connecting the Wireless Controller	19
Sample Applications	21
Connecting to a Secured Network	21
Authenticating to an Authentication Server	22
Logging In to a Captive Portal	24
Where to Go from Here	25
3. Basic Configuration	26
Logging In to the Web Management Interface	27
Web Management Interface Layout	30
Basic Configuration Procedures	31
Basic Configuration Step #1. Enable DHCP Server (Optional)	32
Basic Configuration Step #2. Select the Access Points to be Managed	33
Basic Configuration Step #3. Change the SSID Name and Set Up Security	35
Basic Configuration Step #4. Confirm Access Point Profile is Associated	39
Basic Configuration Step #5. Configure Captive Portal Settings	40
1. Create a captive portal group	40
2. Add captive portal users	41
3. Associate the captive portal group to an interface	44
4. Customize the captive portal login page	45
Basic Configuration Step #6. Use SSID with RADIUS	48
Where to Go from Here	48
4. Advanced Configuration Settings	49
QoS Configuration	50
Enabling QoS Mode	50
Defining DSCP and CoS Settings	52
Configuring DSCP Priorities	52
Configuring CoS Priorities	53
VLANs	56
Enabling VLANs	56
Creating VLANs	57
Editing VLANs	59
Deleting VLANs	61
Port VLANs	62
MultiVLAN Subnets	63
DMZ Settings	66
Configuring a Port to Operate as a DMZ	66
Configuring DMZ Settings	67
Static Routing	69
Adding a Static Route	69
Editing Static Routes	71
Deleting Static Routes	72
Auto-Failover Settings	73
Load Balancing Settings	75
Additional Advanced Configuration Settings	77
5. Securing Your Network	79
Managing Clients	80
Viewing Known Clients and Adding Clients	80
Editing Clients	83
Deleting Clients	84
Content Filtering	85
Enabling Content Filtering	85
Specifying Approved URLs	86
Specifying Blocked Keywords	88
Exporting Web Filters	89
Additional Security Settings	91
6. VPN Settings	92
Configuring VPN Clients	93
Configuring IPsec Policies	95
Adding IPsec Policies	95
Example of a Manual Policy	103
Editing IPsec Policies	104
Enabling IPsec Policies	105
Disabling IPsec Policies	106
Exporting IPsec Policies	107
Deleting IPsec Policies	108
Mode Config Settings	109
DHCP Range	112
PPTP/LT2P Tunnels	113
PPTP Tunnel Support	113
Configuring PPTP Clients	113
Configuring PPTP Servers	114
L2TP Tunnel Support	118
OpenVPN Support	121
Additional VPN Settings	123
7. Viewing Status and Statistics	124
Viewing CPU and Memory Utilization	126
Viewing System Status	128
Viewing Managed Access Point Information	130
Viewing Cluster Information	132
Viewing Hardware and Usage Statistics	134
Wired Port Statistics	136
Managed Access Points and Associated Clients Statistics	137
LAN-Associated Clients	139
WLAN-Associated Clients	141
Sessions through the Wireless Controller	142
Associated Clients	143
LAN Clients	145
Detected Clients	146
Access Point Status	148
Access Point Summary	150
Managed Access Point	152
Authentication Failure Status	154
AP RF Scan Status	156
Global Status	158
Peer Controller Status	161
Peer Controller Configuration Status	163
Peer Controller Managed AP Status	164
IP Discovery	166
Configuration Receive Status	168
AP Hardware Capability	170
Client Status	171
Associated Client Status	173
Associated Client SSID Status	175
Associated Client VAP Status	177
Controller Associated Client Status	179
Detected Client Status	181
Pre-Authorization History	183
Detected Client Roam History	184
8. Maintenance	185
Group Management	186
Adding User Groups	186
Editing User Groups	189
Deleting User Groups	189
Configuring Login Policies	190
Configuring Browser Policies	191
Configuring IP Policies	193
User Management	196
Adding Users Manually	196
Importing Users	198
Editing Users	199
Deleting Users	200
Backing Up Configuration Settings	201
Restoring Configuration Settings	202
Restoring Factory Default Settings	203
Rebooting the Wireless Controller	204
Upgrading Firmware	205
Access Point Firmware Upgrade	205
Wireless Controller Firmware Upgrade	206
Activating Licenses	208
Using the Command Line Interface	210
9. Troubleshooting	211
LED Troubleshooting	212
Power LED is OFF	212
LAN Port LEDs Not ON	212
Troubleshooting the Web Management Interface	213
Using the Reset Button to Restore Default Settings	213
Problems with Date and Time	214
Discovery Problems with Access Points	214
Connection Problems	214
Network Performance and Rogue Access Point Detection	215
Using Diagnostic Tools on the Wireless Controller	215
Pinging an IP Address	215
Using Traceroute	216
Performing DNS Lookups	217
Capturing Log Packets	218
Checking Log Settings	219
Defining What to Log	219
Tracking Traffic	221
Accepted Packets Example	222
Dropped Packets Example	222
Remote Logging	223
Wireless Controller Event Log	226
IPsec VPN Log Messages	227
(USA and Canada Only)	235
Appendix D. Limited Lifetime Warranty	235

Match case Limit results 1 per page

Troubleshooting

214

DWC-1000 Wireless Controller User’s Guide

Problems with Date and Time

The DATE AND TIME page shows the current date and time of day. The wireless controller

uses the Network Time Protocol (NTP) to obtain the current time from one of several

network time servers on the Internet. Each entry in the log is stamped with the date and time

of day.

If you find that the date and time stamps are not accurate, confirm that the wireless

controller can reach the Internet.

Discovery Problems with Access Points

If the wireless controller does not discover any or all access points:

•

Be sure the wireless controller is connected to the LAN (see “LAN Port LEDs Not ON” on

page 212).

•

Be sure you entered the appropriate IP address range if the access points operate in

different VLANs, reside behind an IP subnet, or operate in standalone mode (see “Basic

Configuration Step #1. Enable DHCP Server (Optional)” on page 32).

•

If you are using a firewall, unblock the UDP port number for each access port in the

firewall.

•

Be sure each access point is using a unique IP address (see “IP Discovery” on page 166).

If more than one access point has the same IP address, only one of them is discovered. In

this case, add the access point to the managed list, change its IP address, and then run

discovery again to discover the next access point with that IP address (see “Basic

Configuration Step #2. Select the Access Points to be Managed” on page 33.

Connection Problems

When an access point is converted from standalone mode to managed mode, its static IP

address changes to an IP address that is issued by the DHCP server, either one in the

network or one that is configured on the wireless controller. This occurs to ensure that each

managed access point has a unique IP address.

If there is no DHCP server or if the access point cannot reach the DHCP server, the access

point remains in the Connecting state as it tries to obtain an IP address. If there is no DHCP

server in the network, configure one on the wireless controller (see “Basic Configuration

Step #1. Enable DHCP Server (Optional)” on page 32). When a DHCP server becomes

available, the access point can transition from the Connecting state to the Connected state.