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CHAPTER
3-1
Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02
3
Wireless Local Area Network
A Wireless Local Area Network (WLAN) implements a flexible data communication system frequently
augmenting rather than replacing a wired LAN within a building or campus. WLANs use radio frequency
to transmit and receive data over the air, minimizing the need for wired connections.
The Cisco 819HGW and Cisco 819HWD ISRs have a Host router software running on the first core. The
second core runs the WLAN Access Point software.
If WLAN is not supported in an SKU, all 1 GB DRAM memory is allocated to the first core. For the
SKUs that support WLAN, 128 MB out of the 1 GB main memory is allocated to the second core.
If WLAN is not supported in an SKU, all 1 GB compact flash memory is allocated to the first core. For
the SKUs that support WLAN, 64 MB out of the 1 GB main memory is allocated to the second core.
Note WLAN is only supported on Cisco 819HGW and Cisco 819HWD ISRs introduced in IOS release
15.2(4)M1.
WLAN Features
The Cisco 819HGW and Cisco 819HWD ISRs support the following features:
• Dual-Radio, page 3-1
• Images Supported, page 3-2
• CleanAir Technology, page 3-2
• Dynamic Frequency Selection, page 3-2
• LEDs, page 3-2
Dual-Radio
This release supports Cisco 802 Access Points (AP802). The AP802 is an integrated access point on the
Next Generation of Cisco 819HGW Cisco 819HWD ISRs.
The access point is a wireless LAN transceiver that acts as the connection point between wireless and
wired networks or as the center point of a standalone wireless network. In large installations, the roaming
functionality provided by multiple access points enables wireless users to move freely throughout the
facility while maintaining uninterrupted access to the network.