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Lancom Systems 1621 Troubleshooting, No WAN connection is established, DSL data transfer is slow

Models: 1621 1711 821

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9 Troubleshooting

LANCOM 821 ADSL/ISDN – LANCOM 1621 ADSL/ISDN – LANCOM 1711 VPN

Chapter 9: Troubleshooting

9 Troubleshooting

In this chapter, you will find suggestions and assistance for a few common dif- ficulties.

9.1No WAN connection is established

After start-up the router automatically attempts to connect to the access pro- vider. During this process, the Online LED will blink green. If successful, the LED will switch over to steady green. If, however, the connection can't be established, the Online LED will light up red. The reason for this is usually one of the following:

Problems with the cabling?

Only the cable provided with your device should be used to connect to the WAN. This cable must be connected to the Ethernet port of your broadband access device. The WAN link LED must light green indicating the physical con- nection.

Has the correct transfer protocol been selected?

The transfer protocol is set along with the basic settings. The basic setup wiz- ard will enter the correct settings for numerous DSL providers automatically. Only if your DSL provider is not listed, you will have to enter manually the pro- tocol being used. In any case, the protocol that your DSL provider supplies you with should definitely work.

You can monitor and correct the protocol settings under:

Configuration tool	Run command
LANconfig	Management Interfaces	Interface settings WAN Inter-
	face

WEBconfig	Expert Configuration Setup	Interfaces WAN Interface

9.2DSL data transfer is slow

The data transfer rate of an broadband (Internet) DSL connection is dependent upon numerous factors, most of which are outside of one's own sphere of influence. Important factors aside from the bandwidth of one's own Internet connection are the Internet connection and current load of the desired target.

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Lancom Systems 1621, 821, 1711 manual Troubleshooting, No WAN connection is established, DSL data transfer is slow

Contents

LANCOM 821 ADSL/ISDN - LANCOM 1621 ADSL/ISDN - LANCOM 1711 VPN 2005 LANCOM Systems GmbH, Wuerselen Germany. All rights reserved User manual and reference manual Security settingsPreface Thank you for placing your trust in this LANCOM productinfo@lancom.de Model variantsThis documentation was compiled … Additional instructions which can be helpful, but are not required Notes symbolsImportant instruction that should be followed Setting up Internet access ContentsInstallation Basic configurationSecurity settings Providing dial-up accessLinking two networks Sending faxes with LANCAPIAppendix Troubleshootingwould be possible when relying solely on the telephone network IntroductionHow does ADSL work? High speed via standard telephone linesADSL provider All services via a single cable-thanks to the splitterIdeal for Internet surfers InternetCode ADSL-over-ISDN or ADSL-over-POTS?1.2 Which use does VPN offer? Conventional network infrastructure Networking via the Internet Internet 1.3 FirewallFurther important features of the Firewall are Intrusion Detection Quality-of-Service / Traffic management 1.4 What does a router do?Denial-of-Service Protection 1.4.2 Areas of deployment for routers 1.4.1 Bridgehead to the WANLANCOM 1711 DSL 1.5 What can your LANCOM do?LANCOM 821 ADSL LANCOM 1621 ADSLWAN connection LANCOM 821 ADSLLANCOM 1621 ADSL LANCOM 1711 DSLLANCOM 1711 DSL ConfigurationLANCOM 821 ADSL LANCOM 1621 ADSL2.2 System preconditions 2 Installation2.1 Package contents Front side 2.3 Introducing LANCOM2.3.1 Status displays Meanings of the LEDs Top panelLANCOM Flashing Power LED but no connection?Completely deactivate the lock that has been triggered set limit to The Online LED indicates the overall status of all WAN portsData traffic via the DSL connection Connection status of the ADSL linkConnection status of the WAN connection Data traffic via the ADSL linkSeparate status display for both ISDN B channels Status of the four LAN ports in the integrated switchStatus of ISDN S0 connection ISDN/S0 port ADSL port 2.3.2 The back of the unitVoltage switch Connection for the included power adapter Reset switch Switch with four 10/100Base-Tx connections Serial configuration port2.4 Hardware installation DSL - connect the WAN interface ADSL connector cable transparent plugsusing the included power adapter Connect to power - Connect socket2.5.1 Starting LANCOM setup 2.5 Software installation2.5.2 Which software should you install? 3.1 Which information is necessary? 3 Basic configuration3.1.1 TCP/IP settings IP address and netmask for the LANCOM New LAN-fully automatic configuration possibleConfigure manually nevertheless? Information required for manual TCP/IP configurationEnable DHCP server? 3.1.2 Configuration protection3.1.3 Settings for the DSL connection 3.1.4 Settings for the ISDN connection3.1.5 Connect charge protection 3.2 Instructions for LANconfigLANconfig Complete the configuration with Finish Network without DHCP server 3.3 Instructions for WEBconfigNetwork with DHCP server Starting the wizards in WEBconfigIf you cannot access an unconfigured LANCOM, the problem may be due to the netmask of the LAN with less than 254 possible hosts net- mask 255.255.255.0, please ensure that the IP address x.x.x.254 is located in your own subnet Entering the password in the web browser Manual IP address assignment 3.4 TCP/IP settings to workstation PCsIP address assignment via the LANCOM default IP address assignment via a separate DHCP serverPage ADSL 4 Setting up Internet accessDoes the setup wizard know your Internet provider? Additional information for unknown Internet providersDynamic channel bundling ISDN only Additional connection optionsUser name and password Protocol PPPoE, PPTP or Plain Ethernet IPoELANconfig Quick access to the setup wizards 4.1 Instructions for LANconfig4.2 Instructions for WEBconfig Tools Setup WizardSecurity aspects Always configure both sides5 Linking two networks 5.1.1 General information 5.1 What information is necessary?TCP/IP routing for access to remote network IPX routing for access to remote networkNetBIOS routing for access to remote net Hide local stations for access to remote netNetmask 5.1.2 Settings for the TCP/IP routerExtranet VPN 5.1.3 Settings for the IPX routerDNS access to the remote LAN 5.1.4 Settings for NetBIOS routing 5.3 Instructions for WEBconfig 5.2 Instructions for LANconfigPing - quick testing for TCP/IP connections Security aspects 6 Providing dial-up access6.1 Which information is required? Entry 6.1.1 General informationNotes to the individual values CouplingThe ISDN calling line identity CLI 6.1.2 Settings for TCP/IPUser SAMPLE 6.1.3 Settings for IPX6.1.4 Settings for NetBIOS routing 6.2.2 Dial-up via ISDN 6.2 Settings for the dial-in computer6.2.1 Dial-up via VPN 6.3 Instructions for LANconfig 6.4 Instructions for WEBconfig ISDN 7 Sending faxes with LANCAPILANCOM CD 7.1 Installation of the LANCOM CAPI fax modemSelect the entry Install LANCOM software in the setup program of your Select the option Printers and Faxes from the control panel 7.2 Installation of the MS Windows fax service7.3.1 Send a fax with any given office application 7.3.2 Send a fax with the MS Windows fax service7.3 Sending a fax LANCOM 821 ADSL/ISDN - LANCOM 1621 ADSL/ISDN - LANCOM 1711 VPN 8.1.1 Wizard for LANconfig 8 Security settings8.1 The security settings wizard 8.2 The firewall wizard 8.1.2 Wizard for WEBconfig8.2.1 Wizard for LANconfig Rules 8.3 The security checklist8.2.2 Configuration under WEBconfig Do you make use of a ’Deny All’ Firewall strategy? Have you assigned a password for the configuration?Have you permitted remote configuration? Have you activated the Firewall?Have you closed critical ports with filters? Have you excluded certain stations from access to the router?Is your saved LANCOM configuration stored in a safe place? 9.2 DSL data transfer is slow 9 TroubleshootingProblems with the cabling? 9.1 No WAN connection is establishedLAN statistics 9.4 Cable testing9.3 Unwanted connections under Windows XP Increasing the TCP/IP window size under WindowsChange then to menu item Expert configuration Status LAN statis LANCOM 10.1 Performance data and specifications10 Appendix LANCOMLANCOM Temperature rangeLANCOM LANCOMLANCOM 10.2 Contact assignment10.2.1 ADSL interface ConnectorConnector 10.2.2 Ethernet WAN interface LANCOM 1711 VPN10.2.3 ISDN-S0 interface ConnectorConnector 10.2.5 Configuration interface Outband10.3 CE declaration of conformity 10.2.4 Ethernet interfaces 10/100Base-TNumerics IndexISDN leased line option 15, 17see status displays Setting up access to the InternetWide Area Network WAN Stateful Inspection Firewall