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The advanced options can be used to configure special WLANs; for example, you might want to create a special WLAN for VoIP phone use only, or create a student WLAN that should be time-controlled to provide access only during school hours.

■ Accounting Server: If you added a RADIUS Accounting server on the AAA servers page,

select the RADIUS Accounting server from the drop-down list, and then set the accounting update interval in Send Interim-Update every x minutes. Valid Interim-Update values are 0-1440. Setting the value to 0 disables periodic interim updates to the accounting server, but client IP changes are still sent to the RADIUS Accounting server.

■ Access Controls: Toggle this drop-down list to select the ACL to apply to this WLAN. An

ACL must be created before being available here. For more information, see “Configuring Access Control Lists” on page 84.

■ Rate Limiting: Rate limiting controls fair access to the network. When enabled, the network

traffic throughput of each network device (i.e., client) is limited to the rate specified in the traffic policy, and that policy can be applied on either the uplink or downlink.

Toggle the Uplink and/or Downlink drop-down lists to limit the rate at which WLAN clients upload/download data.

The “Disabled” state means rate limiting is disabled; thus, traffic flows without prescribed limits.

■ Multicast Filter: When enabled for a WLAN, all client multicast traffic will be dropped at the

AP. Broadcast and unicast frames remain unchanged.

■ Access VLAN: By default, all wireless clients associated with APs that ZoneDirector is

managing are segmented into a single VLAN (with VLAN ID 1). If you want to tag this WLAN traffic with a different VLAN ID, enter a valid VLAN ID (2-4094) in the box. Select the Enable Dynamic VLAN check box to allow ZoneDirector to assign VLAN IDs on a per-user basis. Before enabling dynamic VLAN, you need to define on the RADIUS server the VLAN IDs that you want to assign to users. See “How Dynamic VLAN Works” on page 131 for more information.

■ Hide SSID: Activate this option if you do not want the ID of this WLAN advertised at any

time. This will not affect performance or force the WLAN user to perform any unnecessary tasks.

■ Tunnel Mode: Select this check box if you want to tunnel the WLAN traffic back to

ZoneDirector. Tunnel mode enables wireless clients to roam across different APs on different subnets. If the WLAN has clients that require uninterrupted wireless connection (for example, VoIP devices), Ruckus Wireless recommends enabling tunnel mode.

NOTE: Note that Wireless Distribution System (WDS) clients, for example, MediaFlex 7211/ 2111 adapters, do not work when the ZoneDirector WLAN is in Tunnel Mode.

Managing a Wireless Local Area Network Creating a WLAN

NOTE: When tunnel mode is enabled on a WLAN, multicast video packets are blocked on that WLAN. Multicast voice packets, however, are allowed.

■ Background Scanning: Background scanning enables the Ruckus Wireless access points to

continually scan for the best (least interference) channels and adjust to compensate. However, disabling Background Scanning may provide better quality (lower latency) for time-sensitive applications like voice conversations. If this WLAN will be used primarily as a voice network, select this check box to disable Background Scanning for this WLAN. You can also disable Background Scanning per radio (see “Configuring Background Scanning”

on page 77).

■ Load Balancing: Client load balancing between APs is disabled by default on all WLANs.

To disable load balancing for this WLAN, check this box. Ruckus Wireless recommends disabling load balancing on WLANs used for voice. For more information, see “Load Balancing” on page 162.

■ Max Clients: Limit the number of clients that can associate with this WLAN per AP (default

is 100). You can also limit the total number of clients that a specific AP (or radio, on dual radio APs) will manage. See “Reviewing Current Access Point Policies” on page 155 for more information.

■ Grace Period: Allows disconnected users a grace period after disconnection, during which

clients will not need to re-authenticate, on any WLAN that requires authentication.

■ 802.11d: The 802.11d standard provides specifications for compliance with additional

regulatory domains (countries or regions) that were not defined in the original 802.11 standard. Enable this option if you are operating in one of these additional regulatory domains.

■ DHCP Option 82: When this option is enabled and an AP receives a DHCP request from a

wireless client, the AP will encapsulate additional information (such as VLAN ID, AP name, SSID and MAC address) into the DHCP request packets before forwarding them to the DHCP server. The DHCP server can then use this information to allocate an IP address to the client from a particular DHCP pool based on these parameters. See also “DHCP Option 82” on page 152 for information on enabling this option for Ethernet ports.

■ Service Schedule: Use the Service Schedule tool to control which hours of the day, or days

of the week to enable/disable WLAN service. For example, a WLAN for student use at a school can be configured to provide wireless access only during school hours. Click on a day of the week to enable/disable this WLAN for the entire day. Colored cells indicate WLAN enabled. Click and drag to select specific times of day. You can also disable a WLAN temporarily for testing purposes, for example.

Managing a Wireless Local Area Network Creating a WLAN

NOTE: This feature will not work properly if ZoneDirector does not have the correct time. To ensure ZoneDirector always maintains the correct time, configure an NTP server and point ZoneDirector to the NTP server’s IP address, as described in “Setting the System Time” on

page 57.

NOTE: WLAN service will be enabled and disabled based on ZoneDirector’s system time, and not the time zone where the access point is located. These may be different local times if ZoneDirector and the access points are in different time zones.

Figure 78. Advanced options for creating a new WLAN

■ Auto-Proxy: The Auto-Proxy feature automatically configures client browsers with Web

proxy settings when the user joins the wireless network. Clients locate the proxy script according to the Web Proxy Autodiscovery Protocol (WPAD). WPAD uses discovery methods such as DNS and DHCP Option 252 to locate the configuration file. To use this feature, you must designate where the wpad.dat file is to be stored. Click Choose File to upload a wpad.dat file conforming to the WPAD protocol to ZoneDirector, or select External Server and enter the IP address of the external DHCP/DNS server where the file is stored. • Internet Explorer supports DNS and DHCP Option 252, while Firefox, Chrome and Safari

Managing a Wireless Local Area Network Customizing WLAN Security

• The wpad.dat file applies to all WLAN services; the WPAD IP address is for all WLAN services.

• Only 8 WLANs are allowed to save their wpad.dat files on external servers.

NOTE: If Wireless Client Isolation, ACLs or Web/Guest Captive Portal are enabled on the WLAN, additional ACL may be required to allow wireless clients to access the Web proxy server and ZD Captive Portal redirection page. For more information, refer to the Auto-Proxy Application Note available from support.ruckuswireless.com.

■ Inactivity Timeout: Enable the check box and enter a value in minutes after which idle

stations will be disconnected (1 to 144,000 minutes).