Related Manuals for Digi 34
Summary of Contents for Digi 34
- Page 1 Application Note 34 Configuring ADSL to backup to PSTN/ISDN with automatic testing and recovery back to ADSL. UK Support 29 December 2009...
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Page 2: Table Of Contents
1 INTRODUCTION 1.1 Outline The document describes how to configure a Digi Transport router to fail over to PSTN when there is a problem with the main ADSL connection. Once the ADSL connection is working again the router will test it by sending pings and then revert back to ADSL and drop the PSTN connection. -
Page 3: Corrections
Configuration: This Application Note assumes that the Digi Transport router is already configured with a working ADSL connection through PPP 1. 1.3 Corrections Requests for corrections or amendments to this application note are welcome and should be addressed to: uksupport@digi.com Requests for new application notes can be sent to the same address. -
Page 4: Configuration
It is also necessary to configure a settling time on the interface. The settling time is a parameter that prevents the Digi Transport from using the interface until it has been up for the specified number of seconds. This delay is required so that any ICMP echo requests (used for testing the interface) are not sent so soon after the interface has come up that the ISP drops the reply packet. - Page 5 Click OK...
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Page 6: Configure Ppp 4 (Pstn)
2.2 Configure PPP 4 (PSTN) It will be necessary to configure PPP 4 as an outbound interface as the default is for the interface to accept incoming calls. Then ISP configuration will be added. Navigate to the following location: Configuration - Interfaces > PPP > PPP 0 - 4 > PPP 4 > Standard Scroll to the bottom of the page and click “Load dialling defaults”. - Page 7 Click OK Configuration - Interfaces > PPP > PPP 0 - 4 > PPP 4 > Advanced The PSTN interface needs to be configured so that if PPP 1 (ADSL) is up and in service (i.e. passing data) then this interface is not allowed to initiate a connection. Parameter Setting Description...
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Page 8: Configure The Default Routes
Click OK 2.3 Configure the Default Routes It is necessary to configure two default routes, one for PPP 1 and one for PPP 4. The PPP 1 default route needs to be set so PPP 4 is deactivated when PPP 1 returns to service after a successful recovery. Configuration - Routing >... -
Page 9: Configure The Firewall
Click OK 2.4 Configure the Firewall The firewall should be configured to monitor the ICMP requests generated by PPP 1. If the firewall detects that 3 consecutive ICMP echo requests have failed, it will take PPP 1 out of service and deactivated thus allowing PPP 4 to come up. -
Page 10: Save Configuration
Switches the firewall on for this interface Click OK 2.5 Save configuration Save your configuration as the power up configuration. Administration - Save configuration Click OK Reboot the Digi Transport router (or deactivate PPP 1) so the PPP changes take effect. -
Page 11: Testing
PPP 1 is pinging. Once you have the IP address configured and the Digi Transport router is up on the main WAN link, remove your test device from the network or adjust the firewall so it stops responding to the ICMP requests from the Digi Transport router. -
Page 12: Digi Transport Firmware Versions
0 lapbon 0 ana 0 logsize 45 4.2 Digi Transport Firmware Versions This is the firmware \ hardware information: Digi TransPort DR6410-HIA DSL2/2+ Router Ser#:60000 Software Build Ver5081. Nov 17 2009 17:49:53 ARM Bios Ver 5.76 v31 197MHz B128-M128-F300-O1841d1,0 MAC:00042d000000 Async Driver Revision: 1.19... - Page 13 PollANS Revision: 1.2 PPPOE Revision: 1.0 BRIDGE Revision: 1.1 MODEM CC (Option 3G) Revision: 1.4 FLASH Write Revision: 1.2 Command Interpreter Revision: 1.38 SSLCLI Revision: 1.0 OSPF Revision: 1.0 Revision: 1.0 Revision: 1.0 RADIUS Client Revision: 1.0 SSH Server Revision: 1.0 Revision: 1.0 CERT Revision: 1.0...