24-07-2012, 04:14 PM
Making Wired and Wireless Integration A Reality
Making Wired and Wireless Integration A Reality.ppt (Size: 3.25 MB / Downloads: 38)
A WLAN controller system
A WLAN controller system is used to create and enforce policies across many different lightweight access points.
With centralized intelligence, functions essential to WLAN operations such as security, mobility, and quality of service (QoS), can be efficiently managed across an entire wireless enterprise.
Power over Ethernet (PoE)
Sending operating power over Category 5 Ethernet cable
Power Sourcing Equipment (PSE)
Switches, power injector
Powered devices (PD)
Access points, IP phones
Up to 15.4W power per port
Distances up to 100 meters
Alternative: AC power adapter
Components and Structure of a WLAN
Importance of the SSID
The SSID is a case-sensitive, alpha-numeric string that is up to 32-characters.
It is sent in the header of all frames transmitted over the WLAN. The SSID tells wireless devices which WLAN they belong to and with which other devices they can communicate.
All wireless devices in a WLAN must be configured with the same SSID.
What is LWAPP
The Light Weight Access Point Protocol (LWAPP) is used between an AP and a WLAN Controller.
Why is this critical to a scalable network deployment?
Customers want to manage a network, not individual network elements
LWAPP allows a controller to manage the APs