Cisco Systems C819HG4GVK9 Wireless Local Area Network, WLAN Features, Dual-Radio, C H A P T E R

C H A P T E R 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.

Cisco 819 Series Integrated Services Routers Software Configuration Guide

OL-23590-02 3-1