Cabletron Systems 3Com manual Performing Pings, Extended Roaming, Using MD5, Authentication

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Performing Pings 77

10Select Special Functions from the Main Menu.

11Select Use TFTP to Update All Access Points and press Enter, which generates the following prompt: “Are you sure (Y/N)?”

12Type y. The Telnet session ends at this point. The AP resets when the ﬁle transfer and ﬂash programming complete.

13Telnet to the AP using its IP address.

14Type the case-sensitive password at the password prompt, which generates the Main Menu.

15Verify the accuracy of the version number in the System Summary window.

16Press Ctrl+D to end the Telnet session.

Performing Pings	A network node sends a ping packet to a wireless client or AP and waits for a
	response. Use pings to evaluate signal strength between two stations. The other
	station can exist on any AP interface. (This ping operates at the MAC level and not
	at the Internet Control Message Protocol [ICMP] level.
	No pings returned or fewer pings returned than sent can indicate a
	communication problem between the AP and the non-network station.
	To ping a station, follow the procedure below.

1Select Show Wireless Clients from the Main Menu.

2Select Regular from the Show Wireless Clients window. The Wireless Clients window generates.

3Press Tab to highlight the MAC address of the station to ping.

4Press the [F1] key to select Ping [F1] This generates the Packet Ping Setup window.

5Enter the number of Pings (1 to 539), the Packet Length in bytes (1 to 539), and the Packet Data content in hex (0x00 to 0xFF).

6Select Start [CR] to begin pinging.

The AP dynamically displays ping packets transmitted and received.

Extended Roaming	You can achieve authentication by using the MD5 algorithm with a shared key
Using MD5	conﬁgured into the AP and its wireless client. MD5 is a message-digest algorithm
Authentication	that takes an arbitrarily long message and computes a ﬁxed-length (16 bytes) digest
	version of the original message. You can think of the message-digest as a unique
	ﬁngerprint of the original message computed using a mathematical formula or
	algorithm. The message-digest is the authentication checksum of a message from
	a mobile wireless client to an AP during the Home Agent registration process. The
	MD5 algorithm prevents a wireless client from impersonating an authenticated
	wireless client.

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Contents Version AirConnect 11 Mbps Wireless LAN Access Point User GuideBayfront Plaza Santa 3Com CorporationClara, California 95052-8145Contents Installing Access Point Hardware Monitoring Wireless Clients Access Point Installation Conﬁguring the AP Access Point Specifications Technical Support Page Introduction Overview of Digital Wireless NetworkingAirConnect Network TopologiesOverview of Digital Wireless Networking AirConnect Network Topologies Wireless clients AirConnect AccessPoint To the Ethernet LANAirConnect Access Point Wireless clients and APs PowerBASE-TRadio Basics Results in the original digital dataRadio Basics 802.1d Spanning Tree Support Wireless LAN Service AreaSite Surveys Filtering and Access Control Network Control Protocol NCP as described PPP Connection Data Rate Requirement Overview of Digital Wireless Networking Theory of Operation Simple Network Management Protocol Snmp Programmable Snmp Trap Support Using SnmpManagement protocol MIB Increased MIB SupportMethod Description Using the User InterfacePrecautions Installing Access Point HardwarePackage Contents RequirementsStandard power supply 115/230VAC, 50/60Hz, 24V/14 Power OptionsRemote power distribution system, Part Number AP-PS-11 US line cord Part NumberWall Mount To mount an AP on a wall Mounting the APBelow Ceiling Mount To mount an AP on a ceiling Mounting the AP PowerBASE-T can be used to power the AP UsingPowerBASE-T Condition, and other activity LED IndicatorsOff Blinking Power No power Power on During boot sequence 3Com Support Center TroubleshootingVerify AP Operation Electrical Management System EMS operating outletNetwork connection veriﬁcation Verify Network Wiring TopologyPage System Properties Monitoring StatisticsInterface Statistics Forwarding CountsStatistics Ethernet StatisticsRadio Frequency Statistics window, select Main Menu→Misc Statistics MiscellaneousPress Esc or Previous F4 to exit Type Name DefinitionSelect Clear All Statistics Clearing StatisticsKnown APs Gaining access to the User Interface UI Gaining Access to the User Interface UI Using a Web BrowserHelp File Access Setup Network Web Server Help File AccessSelect Virtual Directory Accessing the Web Browser UISelect Close/Exit Select System ConﬁgurationSelect Save F1 to save the conﬁguration Select Special Functions Select Reset APType the case sensitive AP name Under Conﬁguration, select Security Select System PasswordParameter Description Select Easy Setup--Easy SetupSelect Easy Setup--Easy Setup Click Add/Delete Gateways Adding or Deleting Disallowed Wireless Clients Adding Allowed Wireless ClientsAdding or Deleting a Range of Allowed Wireless Clients Considerations For the Short RF Preamble setting, click DisabledEnabling or Disabling Encryption Select Conﬁguration--SecurityFrequency No. of Channels Country Enable or disable interfaces on the APInterface Description Default Condition Enter the Multicast Mask data and voice values Snmp Trap Description Default Value Select Enabled or Disable All for All Snmp TrapsConﬁguring the Originating Modem Filtering to Discard Packets Conﬁguring the Answering ModemFiltering to Forward Packets Click Delete Filter Removing Filtered Packet Types Networking ProtocolsDisabling Type Filtering Under Conﬁguration, select FirmwareSpecial Function Description Active. Clear the wireless client association table forSelect Regular at the Wireless Clients prompt Monitoring Wireless ClientsWireless Clients Indicates a 3Com voice-enabled device Versions Ascii InterfaceLatest version. Refer to Manually Updating AP Firmware on Arrow/Function Key Control Character Enable serial portConﬁgure the AP for the following Prompt Description To exit from submenus, press EscPress Tab to select System Password Select Telnet LoginsTo enable and conﬁgure the serial port connection on the AP Conﬁguring The Serial PortConﬁguring the Dial-Up System Setting DescriptionHanging Up Select Modem HangupWindow InstallationConfiguring the AP That can associate with this AP. The default is Disabled Wsaid PPP with Modems PPP DirectEstablishing a Connection Originating AP Set the Connect Mode to AnswerAnswering AP From the answering APs UIFor automatic dial-out, reset the AP Press up/down arrows to toggle between range and individual Range of Wireless ClientsRemoving All Allowed Wireless Clients Removing Allowed Wireless ClientsEnable/Disable the ACL Adding Disallowed Wireless Clients Load ACL from Wireless Client ListRemoving Disallowed Wireless Clients Address FilteringSetting Logging Clearing WirelessClients from the AP OptionsPrevious version of AP ﬁrmware Manually UpdatingAP Firmware Type the ﬁrmware ﬁle name in the Download Filename ﬁeld Remainder of this procedure uses Windows 98 as an exampleSelect Alter Filenames/HELP URL/TFTP and press Enter Select Send File Open the Special Functions windowSelect Transfer from the emulation program menu bar Select Alter Filenames/HELP URL/TFTP Server and press Enter Download is complete when the UI displaysAuthentication Using MD5Performing Pings Extended RoamingHex-digit sequence Wireless client and the access pointEncryption Restoring Conﬁgurations Press the Tab key to highlight .Short RF Preamble EnabledSelect Restore Factory Conﬁguration Physical Characteristics Access Point SpecificationsRadio Characteristics Frequency No. of Channels Country Output CharacteristicsNetwork Characteristics Technical Support ServicesOnline Technical World Wide Web SiteNorth America Latin AmericaTo obtain an RMA number, call or fax Page Ascii IndexSnmp agent 3Com AirConnect Access Point 3Com Corporation Limited WarrantyObtaining Warranty Radio Frequency Interference Requirements Canada Regulatory Compliance Information3Com End User Software License Agreement Important Read Before Using This Product