Module Practice and Summary

What did I learn in this module?

Remote workers, small branch offices, and home networks often use a wireless router, which typically include a switch for wired clients, a port for an internet connection (sometimes labeled “WAN”), and wireless components for wireless client access. Most wireless routers are preconfigured to be connected to the network and provide services. The wireless router uses DHCP to automatically provide addressing information to connected devices. Your first priority should be to change the username and password of your wireless router. Use your router’s interface to complete basic network and wireless setup. If you want to extend the range beyond approximately 45 meters indoors and 90 meters outdoors, you can add wireless access points. The router will use a process called Network Address Translation (NAT) to convert private IPv4 addresses to Internet-routable IPv4 addresses. By configuring QoS, you can guarantee that certain traffic types, such as voice and video, are prioritized over traffic that is not as time-sensitive, such as email and web browsing.

Lightweight APs (LAPs) use the Lightweight Access Point Protocol (LWAPP) to communicate with a WLAN controller (WLC). Configuring a wireless LAN controller (WLC) is similar to configuring a wireless router except that a WLC controls APs and provides more services and management capabilities. Use the WLC interface to view an overall picture of the AP’s system information and performance, to access advanced settings and to configure a WLAN.

SNMP is used monitor the network. The WLC is set to forward all SNMP log messages, called traps, to the SNMP server. For WLAN user authentication, a RADIUS server is used for authentication, accounting, and auditing (AAA) services. Individual user access can be tracked and audited. Use the WLC interface to configure SNMP server and RADIUS server information, VLAN interfaces, DHCP scope, and a WPA2 Enterprise WLAN.

There are six steps to the troubleshooting process. When troubleshooting a WLAN, a process of elimination is recommended. Common problems are: no connectivity and poorly performing wireless connection when the PC is operational. To optimize and increase the bandwidth of 802.11 dual-band routers and APs, either: upgrade your wireless clients or split the traffic. Most wireless routers and APs offer upgradable firmware. Firmware releases may contain fixes for common problems reported by customers as well as security vulnerabilities. You should periodically check the router or AP for updated firmware.

13.5.4 Module Quiz – WLAN Configuration