Moxa Technologies MOXA AirWorks, AWK-1100 user manual TCP/IP Settings Problems

Page 44

MOXA AirWorks AWK-1100 User’s Manual

Troubleshooting

TCP/IP Settings Problems

IEEE 802.11g

Ethernet LAN

Stage A

State B

Correspondent

Host

Internet

Stage D

	Client	AP	Default Gateway	DNS Server
	Computer		of Client Computer	of Client Computer
		Communication stages for a client to reach its correspondent host
	For a wireless client computer to communicate with a host on the Internet by the host’s domain
	name (e.g., http://www.wi-fi.com), it first sends a DNS request to a DNS server on the Internet.
	The DNS request travels first to the AP, and then the AP relays this request to the default gateway
	of the client computer. Finally, this request is forwarded by the gateway to the DNS server on the
	Internet. The DNS reply issued by the DNS server is transmitted back to the client computer
	following a reverse path. When the client computer receives the DNS reply, it knows the IP
	address of the correspondent host and sends additional packets to this IP address.
	As illustrated in the above figure, the communication path could be broken at some of the stages.
	The OS-provided network diagnostic tool, ping.exe, can be employed to determine TCP/IP-related
	communication problems.

NOTE	If two or more NICs are installed and operating on a client computer, TCP/IP may not work

properly due to incorrect entries in the routing table. Use the OS-provided command-line network tool, route.exe, to add or delete entries from the routing table. Or, use Windows-provided Device Manager to disable unnecessary NICs.

Solve the following problems in order:

The AP does not respond to ping from the client computer.

yAre two or more NICs installed on the client computer?

¾Use the OS-provided command-line network tool, route.exe, to modify the contents of the routing table.

¾Use Windows-provided Device Manager to disable unnecessary NICs.

yIs the underlying link (Ethernet or IEEE 802.11g) established?

¾Make sure the Ethernet link is OK.

¾Make sure the wireless settings of the wireless client computer and of the AP match.

B-2

Image 44

Contents Moxa AirWorks AWK-1100 User’s Manual First Edition, JulyDisclaimer Copyright NoticeTrademarks Table of Contents Page Introduction Package Checklist Product FeaturesProduct Specifications OverviewMechanical Page ‰ Confirming the Settings of the AP and Client Computers Getting StartedFirst-Time Installation and Configuration AP Client Select the Operational Mode for AWK-1100AP/Bridge Configure AWK-1100’s Ieee 802.11 settings Review and Apply SettingsConfiguring Ieee 802.11g-related Settings Deploying the Access Point APSetting up Client Computers Checking if the Ieee 802.11g-related Settings Work Confirming the Settings of the AP and Client ComputersConfiguring TCP/IP-related Settings Checking if the TCP/IP-related Settings Work To check if a client computer can assess the InternetPage Web Console Configuration ‰ Viewing StatusMenu Structure Save, Save & Restart, and Cancel Buttons Home and Refresh ButtonsAssociated Wireless Clients Viewing StatusCurrent Dhcp Mappings System LogLink Monitor AP Client mode only Specifying the Operational ModeGeneral Operations STA-APAdministrative Password Managing the FirmwareUpgrading Firmware by Http AP/Bridge AP ClientBacking up and Restoring Configuration Settings by Http Upgrading Firmware by TftpChoose Tftp as the Firmware management protocol Backing up and Restoring Configuration Settings by Tftp Addressing Configuring TCP/IP-related SettingsResetting the Configuration to Factory Defaults Static Dhcp Mappings Dhcp Server AP/Bridge modes onlyBasic Link Integrity Configuring Ieee 802.11g-related SettingsCommunication AP Load Balancing Wireless Distribution SystemAssociation Control Sample wireless bridge network topology Security STA Shared Key , and Auto Set the Access control type to inclusive MAC-Address-Based Access ControlSet the Access control type to exclusive Ieee 802.1X/RADIUS AP mode only Click DownloadInternet Configuring Advanced Settings Packet FiltersEthernet Type Filters IP Protocol FiltersManagement TCP/UDP Port FiltersUPnP System LogSnmp Page Default Settings LAN Interface ManagementSnmp read community Snmp write communityWireless client computer cannot associate with an AWK-1100 TroubleshootingWireless Settings Problems TCP/IP Settings Problems AP does not respond to ping from the client computerUnknown Problems Moxa AirWorks AWK-1100 User’s Manual TTE Compliance Statement Regulatory StatementFederal Communication Commission Interference Statement Moxa AirWorks AWK-1100 User’s Manual Regulatory Statement Service Information Moxa Internet Services Following services are providedProblem Report Form Moxa Product † AWK-1100-US † AWK-1100-EU Serial NumberProduct Return Procedure