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Deployment

Protocol Requirements

One of the critical decisions in deploying a wireless LAN is deciding which protocols and bands it will

support. The following table shows the options and the advantages/disadvantages of each.

Table 1

Protocol/Band

802.11a/b/g

802.11 b/g only

802.11a only

Customers typically want seamless full RF coverage or partial RF coverage in conference rooms, lunch

rooms, etc.

Coverage holes are areas where clients cannot receive a signal from the wireless network. When

deploying wireless networks, there is a trade-off between the cost of the initial network deployment and

the percentage of coverage hole areas. A reasonable coverage hole criterion for launch is between 2 and

10 percent. This means that between two and ten test locations out of 100 random test locations may

receive marginal service. After launch, the Cisco WLAN Solution Radio Resource Management (RRM)

will identify these coverage areas and report them to the IT manager, allowing the IT manager to fill

holes based on user demand.

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Protocol Requirements

Advantage

Highest capacity option (three

802.11b/g channels and thirteen

802.11a channels)

Highest performance option (54 Mbps

for both 802.11g and 802.11a)

Rogue access point detection for both

2.4 GHz 802.11b/g and 5.0 GHz

802.11a bands

Supports legacy clients

Lowest cost Cisco 1000 Series IEEE

802.11a/b/g lightweight access point

High performance

High Capacity

Deployment Guide: Cisco Aironet 1000 Series Lightweight Access Points

Determining Deployment Requirements

Disadvantage

Small increase in the Cisco 1000 Series

IEEE 802.11a/b/g lightweight access

point cost

802.11g performance is limited in the

presence of 802.11b users

Limited capacity

Does not support 802.11a clients

Does not support 802.11b/g clients