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The Netopia R6000 Series offers dial backup functionality in the event of a line failure on its primary WAN link.
The firmware supports backup to an external modem connected to the Auxiliary port or an internal V.90 modem
via a V.90 modem WAN module or an ISDN interface via an ISDN WAN interface module in the second WAN slot.
R6120 models have integrated V.90 backup built in. R6131 models have integrated ISDN backup built in.
This chapter covers the following topics:
WAN Configuration on page 9-2
IP Setup screen on page 9-7
Connection Profiles on page 9-8
Using Scheduled Connections with Backup on page 9-8
Management/Statistics on page 9-11
QuickView on page 9-12
Event Logs on page 9-13
SNMP Support on page 9-13
The purpose of dial backup is to provide a recovery mechanism in the event that the primary connection fails. A
failure can be either line loss, for example by central site switch failure or physical cable breakage, or in the
case of Frame Relay (with LMI) or PPP, loss of end-to-end connectivity. Detection of one of these failures causes
the router to switch from using the primary WAN port to using the Auxiliary port to which a modem has been
attached or to an internal asynchronous modem or ISDN WAN module if one is installed. The port used for
backup is determined by whether or not a second WAN module is installed in the router. If there is only one
WAN module installed then the Auxiliary port is the backup port. If an asynchronous modem or ISDN WAN
module is installed in the second slot, then that is the backup port.
In the event of a loss of primary connectivity you have the option of switching back to the primary port
automatically once it has recovered its connection.
The supported backup ports are the Auxiliary port or an asynchronous V.90 modem or ISDN WAN module in
Switched Asynchronous mode with PPP as the data link encapsulation.
Dial Backup 9-1
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