Instruction/ maintenance manual of the product 34 Digi
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1 Application Note 34 Configuring ADSL to back up to PSTN/I SDN with automatic testing a nd recovery back to AD SL. UK Support 29 December 2009.
2 Contents 1 Introductio n ............................................................................................................................................... 2 1.1 Outline ..................................................................
3 Configuration: This Applic ation Note assume s t hat the Digi Transp ort router is already c onfigured with a worki ng ADSL connection through PPP 1 . 1.3 Corrections Requests for cor re ctions or amendment s to this applicat i on not e are welcome an d sho uld be addressed to: uksupport@digi.
4 2 CONFIGURA TION 2.1 Configure PPP 1 (ADSL) This PPP interface sho uld already be conf igured for use with the I SP. You shoul d confirm that you hav e a working ADSL con ne ction before pro ceeding with this conf iguration. The PPP 1 interface needs to be conf igu red to be “always on”.
5 Click OK.
6 2.2 Configure PPP 4 ( PST N ) It will be necessary t o configure PPP 4 a s an out bound interface as the default is f or t he interface to accept incoming calls.
7 Click OK Configuration - Inte rfaces > PPP > PPP 0 - 4 > PPP 4 > Advanced The PSTN interface nee ds to be configured so t hat if PPP 1 (ADSL) is up and in s erv ice (i.e. passi ng dat a) then this interface is n ot allowed to init i at e a connection.
8 Click OK 2.3 Configure the Default Routes It is necessary t o configure two default routes, on e for PPP 1 and one f or PPP 4 . The PPP 1 default rout e needs to be set so PP P 4 i s dea ctivated when PPP 1 returns to service af ter a successful rec overy.
9 Click OK 2.4 Configure the Firewall The firewall should be configured t o m on itor the ICMP request s generated by PPP 1. If the firewall detect s that 3 consecut i v e ICMP echo request s hav e f ailed, it will take PP P 1 out of service and deactiv at ed thus allow ing PPP 4 to come up.
10 inspect - state – monitor the pi ng s for echo replies and al l ow them back in oos 10 t= 3 c= 3 d= 3 – if 3 consec u tive pings fail, deacti v ate PPP 1 and start recovery procedure s af t er 10 seconds .
11 3 TES TING 3.1 Simulate a f ailure To test the fail ov er and r ecovery you will need t o configure the PPP interface to ping a I P address that you can easily stop respon ding to ICMP requ ests (either through the us e of a firewall or by phy sically disconnecting it from the network).
12 ppp 4 username "user@isp.com " ppp 4 epassword "encrypted" ppp 4 phonenum " 0845 1400101 " ppp 4 use_modem 3 ppp 4 aodion 1 ppp 4 pwr_dly 60 ppp 4 autoassert 1 ppp 4 i.
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 BGP Revision: 1.0 QOS Revision: 1.0 RADIUS Client Revision: 1.
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If you have not bought Digi 34 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Digi 34 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Digi 34 you will learn all the available features of the product, as well as information on its operation. The information that you get Digi 34 will certainly help you make a decision on the purchase.
If you already are a holder of Digi 34, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Digi 34.
However, one of the most important roles played by the user manual is to help in solving problems with Digi 34. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Digi 34 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
