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Figure 18-1:<br />

Three APs<br />

provide a<br />

much<br />

stronger<br />

signal than<br />

a single AP.<br />

Chapter 18: Ten Ways to Troubleshoot <strong>Wireless</strong> LAN Performance<br />

Coverage by one Access Point –<br />

Signal fades with distance<br />

Carefully choose which channels you use for each <strong>of</strong> your access points.<br />

Make sure that you have proper spacing <strong>of</strong> your channels if you have 802.11g<br />

access points (which have overlapping bands). Read the section “Change<br />

Channels,” earlier in this chapter, for more information on channels.<br />

Add a Repeater or Bridge<br />

Coverage by three Access Points –<br />

Strong combined signals<br />

<strong>Wireless</strong> repeaters are an alternative way to extend the range <strong>of</strong> an existing<br />

wireless network instead <strong>of</strong> adding more APs. We talk earlier in this book<br />

(refer to Chapter 2) about the role <strong>of</strong> bridges and repeaters in a wireless<br />

network. The topic <strong>of</strong> bridges can be complex, and we don’t want to rehash<br />

it here — be sure to read Chapter 2 for all that juicy detail.<br />

Not many stand-alone repeaters are on the consumer market. However,<br />

what’s important for our discussion is that repeater capability is finding its<br />

way into the AP firmware from many AP vendors. A wireless AP repeater<br />

basically does double duty — it’s an AP as well as a wireless connection back<br />

to the main AP that’s connected to the Internet connection.<br />

Meraki Networks (meraki.com) has created the Meraki Mini ($50), the ultimate<br />

smart AP. If you use one connected to an Ethernet connection from your<br />

wireless network, you get a simple wireless AP running 802.11b/g. You add<br />

another unit by plugging it into an electrical connection within range <strong>of</strong> the<br />

first unit. The second unit will find the first and, using a sophisticated mesh<br />

routing technology, will increase the range <strong>of</strong> the first AP and increase the<br />

capacity as well. Meraki is selling these supersmall APs (about the size <strong>of</strong> a<br />

335

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