1 / 34

Chapter 10

Wireless Devices. Chapter 10. Outline. Wireless LAN client devices Progression of WLAN architecture Specialty WLAN infrastructure. Wireless LAN client devices. Radio Card Formats PCMCIA-type adapter (PC Card). Wireless LAN client devices. Radio Card Formats Mini PCI.

ceana
Download Presentation

Chapter 10

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Wireless Devices Chapter 10

  2. Outline • Wireless LAN client devices • Progression of WLAN architecture • Specialty WLAN infrastructure

  3. Wireless LAN client devices • Radio Card Formats • PCMCIA-type adapter (PC Card)

  4. Wireless LAN client devices • Radio Card Formats • Mini PCI

  5. Wireless LAN client devices • Radio Card Formats • Express Card is hardware standard that is replacing PCMCIA cards

  6. Wireless LAN client devices • Radio Card Formats • SD and CF card

  7. Wireless LAN client devices • Radio Card Formats • Desktop PCI adapter

  8. Wireless LAN client devices • Radio Card Formats • USB adapter

  9. Wireless LAN client devices • Radio Card Chipsets • Client Utilities

  10. Progression of WLAN Architecture

  11. Progression of WLAN Architecture • Autonomous Access Point – Intelligent Edge Architecture • Fat APs, stand-alone APs, or intelligent edge APs • All configuration settings exist in the autonomous AP itself, and, therefore, managment and configuration occurs at the access layer • All encryption and decryption mechanism and MAC layer mechanisms also operate within the autonomous AP

  12. Progression of WLAN Architecture • Autonomous Access Point – Intelligent Edge Architecture • Features: • Multiple managment interfaces: command line, web GUI and SNMP • WEP, WPA and WPA2 security capabilities • WMM quality-of-service capablilities • Fixed or detachable antennas • Filtering options, such as MAC and Protocol • Connectivity modes: root, repeater, bridge, and scanner • VLAN support (VLANs are created on a managed wired switch)

  13. Progression of WLAN Architecture • Wireless Network Management System (WNMS) • WNMS provides a central point of managment to configure and maintain thousands of autonomous APs. • WNMS can be either a hardware appliance or a software solution • Configuration settings and firmware upgrades can be pushed down to all the autonomous APs

  14. Progression of WLAN Architecture • Wireless Network Management System (WNMS) • Features • RF spectrum planning and management • Monitor and intelligent edge WLAN architecture with arlam and notifications centralized and integrated into a management console • Network reporting, trending, capacity planning, and policy enforcement • Rogue AP detection • WNMS will not assist in the roaming capabilities between APs

  15. Progression of WLAN Architecture • Wireless Network Management System (WNMS)

  16. Progression of WLAN Architecture • Centralized WLAN Architecture • WLAN controller • Central WLAN controller resides in the core of network • The distribution system service (DSS) and integration service (IS) function within the WLAN Controller • Almost all of configuration settings are configured on the centralized WLAN Controller

  17. Progression of WLAN Architecture • Centralized WLAN Architecture • WLAN controller function • AP management • 802.11 traffic tunneling • AP group profiles • WLAN profiles • Virtual BSSIDs • VLANs • User management • Layer 2 security support • Layer 3 and 7 VPN concentrators

  18. Progression of WLAN Architecture • Centralized WLAN Architecture • WLAN controller function (cont.) • Captive portal(guest WLAN and guest WLAN profiles) • Automatic failover and load balancing • Internal Wireless Intrusion Dectection Systems • Dynamic RF spectrum management • Bandwidth management • Firewall capabilities • Layer 3 roaming support • Management interfaces

  19. Progression of WLAN Architecture • Centralized WLAN Architecture • Lightweigh AP • In the centralized WLAN architecture, autonomous APs have been replaced with lightweight access points, also know as thin APs • Lightweight AP has minimal intelligence and very limited sofware capabilities. • Security settings are configured on the WLAN controller but some lightweight AP still handle the encryption and decryption machanism

  20. Progression of WLAN Architecture • Split MAC • Some of MAC services are handle by WLAN controller, and some are handle by lightweight AP • WLAN controller • Integration service and distribution system service • WMM QoS • Lightweight AP • Encryption and decryption of 802.11 data frames • 802.11 management and control frame

  21. Progression of WLAN Architecture • Remote Office WLAN controller • Remote office WLAN controller is to allow remote and branch offices to be managed from a single location • Remote WLAN controller typically communicate with a central WLAN controller across a WAN link • The central controller will download the network configuration settings to the Remote WLAN controller

  22. Progression of WLAN Architecture • Distributed WLAN hybrid • Distributed WLAN architecture that uses a WLAN controller that manages hybrid fat/thin access points • QoS policies and all of the 802.11 MAC data forwarding is handled at the edge of the network at the AP instead of back on the WLAN controller • Unified WLAN architecture • WLAN architecture could very well take another direction by fully integrating WLAN controller into wired network infrastructure devices

  23. Progression of WLAN Architecture • Specialty WLAN infrastructure • Wireless Workgroup bridge • A wireless workgroup bridge (WGB) is a wireless device that provides wireless connectivity for wired infrastructure devices that do not have radio cards. • The radio card inside the WGB associates with an AP and joins the basic service set (BSS) as a client station • Because the WGB is an associated client of the access point, the WGB does not provide connectivity for other wireless clients

  24. Progression of WLAN Architecture • Specialty WLAN infrastructure • Wireless LAN bridge • The purpose of bridging is to provide wireless connectivity between two or more wired networks • Wireless bridges support two major configuration settings: root and non-root • A bridge link that connects only two wired networks is known as a point-to-point (PtP) bridge • A point-to-multipoint (PtMP) bridge link connects multiple wired networks

  25. Progression of WLAN Architecture • Specialty WLAN infrastructure • Enterprise Wireless Gateway • An enterprise wireless gateway (EWG) is a middleware device used to segment autonomous AP from the protected wired network infrastructure • EWG can segment the unprotected wireless network from the protected wired network by acting as a router, a VPN end point, and/or a firewall. • There is no AP management available within a EWG • EWG does not have an internal WIDS, RF spectrum management or control.

  26. Progression of WLAN Architecture • Specialty WLAN infrastructure • Residential Wireless Gateway • Residential wireless gateway(RWG) is a very fancy term for a home wireless router • The following features are supported by a residential wireless gateway: • Configurable 802.11 radio card • Support for simple routing protocols such as RIP • Network Address Translation (NAT) • Port Address Translation (PAT) • Port forwarding • Firewall • L2 security support (WEP or WPA1 Personal or WPA2 Personal) • DHCP server • Multiport Ethernet switch for connecting wired clients

  27. Progression of WLAN Architecture • Specialty WLAN infrastructure • VPN Wireless Router • Enterprise-class wireless routers exist that can also act as an end point for a VPN tunnel • VPN wireless routers are typically used as edge router solutions in remote or branch offices

  28. Progression of WLAN Architecture • Specialty WLAN infrastructure • Wireless LAN Mesh Routers • Wireless mesh routers communicate with each other using proprietary layer 2 routing protocols, creating a self-formingand self-healing wireless infrastructure (a mesh) over which edge devices can communicate • A self-forming WLAN mesh network automatically connects access points upon installation and dynamically updates routes as more clients are added. • Because interference may occur, a self-healingWLAN mesh network will automatically reroute data traffic in a Wi-Fi mesh cell.

  29. Progression of WLAN Architecture • Specialty WLAN infrastructure • Enterprise Encryption Gateway • An enterprise encryption gateway (EEG) is an 802.11 middleware device that provides for segmentation and encryption • WLAN array • A company called Xirrus offers a proprietary solution that combines a WLAN controller and multiple AP in a single hardware device known as a Wi-Fi Array • Up to 16 AP radios using sector antennas and an embedded WLAN controller all reside in one device

  30. Progression of WLAN Architecture • Specialty WLAN infrastructure • Cooperative control • Cooperative control AP (CC-AP) combines an autonomous AP with a suite of cooperative control protocols, without requiring a WLAN controller • The cooperative control protocols enable multiple CC-AP to be organized into groups

  31. Progression of WLAN Architecture • Specialty WLAN infrastructure • Virtual AP system • A virtual AP solution uses multiple access points that all share a single basic service set identifier (BSSID) MAC address • client stations believe they are connected to only a single AP, although they may be actually roaming across multiple AP • The main advantage is that clients experience a “zero handoff” time and many of the latency issues associated with roaming are resolved • All of the AP in an Single channel architecture (SCA) transmit on the same channel yet do not interfere with each other

  32. Progression of WLAN Architecture • Specialty WLAN infrastructure • Real-time Location Systems (RTLS) • WLAN RTLS can track the location of any 802.11 radio device as well as active Wi-Fi RFID tags • Active RFID tags and/or standard Wi-Fi devices transmit a brief signal at regular interval, adding status or sensor data if appropriate • The signal is received by standard AP (or RTLS sensors) without any infrastructure changes needed, and is sent to RTLS server • The RTLS server uses signal strength and/or time-of-arrival algorithms to determine location coordinates

  33. Progression of WLAN Architecture • Specialty WLAN infrastructure • VoWiFi • VoWiFi telephone • 802.11 infrastructure (autonomous AP and/or WLAN controller solution can both be used) • PBX • PBX make connections among the internal telephones of a private company and also connect them to PSTN via trunk lines • PBX provides dial tone and may provide other features such as voicemail • QoS

  34. The END Chapter 10

More Related