wifi installation best practices part 2 of 2

Wireless 802.11g/n

Installation Simplified – Part 2 of 2

Considerations

Security Simplified Branded Pre-Encryption


Environment Simplified Channels Wireless Gain

Considerations



Interop Simplified Device Considerations Finding the “SWEET SPOT”

Considerations



Interop Simplified Device Considerations Finding the “SWEET SPOT”

TSHOOT Simplified Inspecting AP Saturation Inspecting Channel Saturation Inspecting Performance

Considerations

802.11x protocol Is it b,g,n Which Frequency Range How many Antennas

LAN Host Interoperability


Proprietary Config What chipset is used What Parameters are Specified




Operating System Manufacturer Frequency of Updates Networking Protocols




Operating System Manufacturer Frequency of Updates Networking Protocols

Product Class Handheld Game Mobile Phone PC STB


802.11x Standards

Frequency Range

• 2.4 Ghz

• 5 Ghz

802.11x Standards

Frequency Range Standard Type

• 2.4 Ghz

• 5 Ghz

• 802.11b 11mbps

• 802.11g 54mbps

• 802.11n 130mbps/ 270mbps 2.4Ghz 600mbps 5Ghz

802.11x Standards

Frequency Range Standard Type Antennas

• 2.4 Ghz

• 5 Ghz

• 802.11b 11mbps

• 802.11g 54mbps

• 802.11n 130mbps/ 270mbps 2.4Ghz 600mbps 5Ghz

• Number of Antennas

• Sensitivity

• Output Power

Amplify SignalIncrease Output

Increase Range

High Gain Antennas

2dbi 5dbi 9dbi


Increase Range

Shape Signal

As signal Increases, shape becomes wider and flatter

Green = -2dbi

Blue = -5dbi

Purple = -9dbi

High Gain Antennas

2dbi 5dbi 9dbi


Increase Range

Shape Signal

As signal Increases, shape becomes wider and flatter

Green = -2dbi

Blue = -5dbi

Purple = -9dbi

Radio OutputRadio intensity affects signal output

Increasing signal increase SNR

High Gain Antennas

2dbi 5dbi 9dbi

Proprietary Configurations

Chipset Manufacturer

• Realtek

• Intel

• Broadcom

• Atheros


Chipset Manufacturer Parameters

• Realtek

• Intel

• Broadcom

• Atheros


Chipset Manufacturer Parameters Support

• Realtek

• Intel

• Broadcom

• Atheros

• Does the device support AES?

• Is this a mixed environment?

• Does the Client Support WMM?

Operating System

Network Settings• TCPIP Stack

• IPv6 Support

• Network Topology Sniff

• Retained Settings

Operating System

Network Settings Drivers• TCPIP Stack

• IPv6 Support



• Does the device have the correct driver

• Does the device connect to other APs with similar settings

• Does the device periodically disconnect

Operating System

Network Settings Drivers Support• TCPIP Stack

• IPv6 Support



• Does the device have the correct driver

• Does the device connect to other APs with similar settings

• Does the device periodically disconnect

• Does the OS support your encryption type

• Does the OS support your speed?

Device Type

Handheld Gaming

• Some hand-held devices do not support WPA or WPA2

Device Type

Handheld Gaming Mobile Phones


• Networking Protocols

• Encryption Support

• 802.11x protocols

Device Type

Handheld Gaming Mobile Phones Other Portables


• Networking Protocols

• Encryption Support

• 802.11x protocols

• Same considerations as mobile phones

Trouble Shooting

No one can connect…Check Wireless Channel

• Check GUI for Interference

• Check other Aps in area

• Change the Wireless Channel

Trouble Shooting

No one can connect…Check Wireless Channel Device Flooding Network




• Check GUI for clients

• Disable offending devices

• When located, check settings on device

Trouble Shooting

No one can connect…Check Wireless Channel Device Flooding Network Other Possibilities




• Check GUI for clients

• Disable offending devices

• When located, check settings on device

• Check WPA PSK Key

• Have devices retained older settings after change

• Change SSID Name and Password before reset

• Enable / Disable Client Isolation

Trouble Shooting

One Device Cannot ConnectDelete Wireless Account

Trouble Shooting

One Device Cannot ConnectDelete Wireless Account Verify Settings and Driver

• AP Settings

• Device Settings

• Device Driver

Trouble Shooting

One Device Cannot ConnectDelete Wireless Account Verify Settings and Driver Reboot Device and Reconnect

• AP Settings

• Device Settings

• Device Driver

• Reboot Device

• Connect and Configure Settings

Trouble ShootingOther Considerations

WMM Required for Higher Bandwidth

Ensure Device Support WMM

Enable / Disable WMM Advertise

Enable / Disable APSD

Disable Radio Power Save







WMF for Multicasting If you are using Over The Top wireless STBs, then enable WMF








Client Isolation Keep infected devices from flooding clients









LAN Firewall Keep infected devices from flooding LAN










Fragmentation Threshold Some devices may have non-standard parameters











OBSS Co Existence Can BSSIDs Operate within the same frequency range?











OBSS Co Existence Can BSSIDs Operate within the same frequency range?

802.11n Protection Gives Deference to 802.11n devices – may affect G Performance

wifi installation best practices part 2 of 2

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