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ZyXEL Communications G-160 2.1.6 Profile, 2.1.7 Threshold Controls, Profile, RTS Threshold, RTS Threshold, RTS Threshold, Fragmentation Threshold, Figure 2-4Roaming Example

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ZyAIR G-160 User’s Guide

Figure 2-4 Roaming Example

2.1.6 Profile

The Profile function allows you to save or delete the wireless network settings and use one of the pre- configured network profiles.

2.1.7 Threshold Controls

Fragmentation Threshold

A fragmentation threshold is the maximum data fragment size (between 256 and 2432 bytes) that can be sent in the wireless network before the ZyAIR will fragment the packet into smaller data frames.

A large fragmentation threshold is recommended for networks not prone to interference while you should set a smaller threshold for busy networks or networks that are prone to interference.

If the fragmentation threshold value is smaller than the RTS Threshold value (see previously) you set then the RTS (Request To Send)/CTS (Clear to Send) handshake will never occur as data frames will be fragmented before they reach RTS Threshold size.

RTS Threshold

A hidden node occurs when two stations are within range of the same access point, but are not within range of each other. The following figure illustrates a hidden node. Both stations are within range of the access point (AP) or wireless gateway, but out-of-range of each other, so they cannot “hear” each other, that is they do not know if the channel is currently being used. Therefore, they are considered hidden from each other.

2-4	Using the ZyAIR Utility

Contents

Page Copyright ZyXEL Limited Warranty Information for Canadian Users Federal Communications Commission (FCC) Interference Statement Page Customer Support Page Table of Contents Appendix B Types of EAP Authentication Index List of Figures List of Tables Preface Page Getting Started 1.1About Your ZyAIR 1.2ZyAIR Hardware and Utility Installation 1.3Disable Windows XP Wireless LAN Configuration Tool 1.3.1 The Connect to Wireless Network Screen Page 1.4Accessing the ZyAIR Utility 1.5Common Screen Command Buttons Page Using the ZyAIR Utility 2.1About Wireless LAN Network 2.1.1 Channel 2.1.2SSID 2.1.3 Transmission Rate (Tx Rate) Ad-Hoc(IBSS) Figure 2-1 Ad-hocNetwork Example To set up an ad-hocnetwork, configure all wireless stations in ad-hocnetwork type and use the same SSID and channel Infrastructure 2.1.5 Roaming 2.1.6 Profile 2.1.7 Threshold Controls 2.1.8 Wireless LAN Security 2.1.9 Data Encryption with WEP 2.1.10 Authentication Mode 2.1.11 Preamble Type 2.1.12 IEEE 2.1.13 WPA 2.1.14 WPA-PSKApplication Example 2.1.15 WPA with RADIUS Application Example 2.2The Main Screen Figure 2-9Main Table 2-1Main 2.2.1 Connecting to a Network 2.2.2 The New Connection screen This only works if the wireless device to which the ZyAIR is connected also supports this feature 2.2.3 The Advanced Screen Figure 2-11Main: Advanced Table 2-3Main: Advanced 2.3The Advanced Screen Table 2-4Advanced 2.4The Privacy Screen 2.4.1 WEP Configuration Figure 2-14WEP Configuration Table 2-6WEP Configuration The values for the keys must be set up exactly the same on all wireless devices in the same wireless LAN ASCII WEP key is case sensitive 2.4.2 802.1x Configuration 2.4.3 WPA-PSKConfiguration 2.5The Statistics Screen Figure 2-17Statistics Table 2-9Statistics 2.6The About Screen Figure 2-18About Table 2-10About Maintenance 3.1Removing the ZyAIR Utility 3.2Upgrading the ZyAIR Utility Page Troubleshooting 4.1Problems Starting the ZyAIR Utility Program 4.2Problems Communicating With Other Computers 4.3Problem with the Link Status Appendix A Product Specifications Page Appendix B Types of EAP Authentication LEAP Comparison of EAP Authentication Types Index