Netopia R7200, User Reference Manual

Page: 73 / 258

Line Backup 9-1
C C
C Ch
h
h haa a ap
p
p pttttee e errrr 9
9
9 9
LLL
Liiiin
n
n nee e e B
B
B Baa a acccckk k ku
u
u up
p
p p
The Netopia R7200 SDSL Router offers line backup functionality in the event of a line failure on your primar y
WAN link.
This chapter covers the following topics:
■
“WAN Configuration” on page 9-2
■
“IP Setup screen” on page 9-4
■
“Connection Profiles” on page 9-5
■
“Using Scheduled Connections with Backup” on page 9-5
■
“Management/Statistics” on page 9-7
■
“QuickView” on page 9-9
■
“Event Logs” on page 9-9
■
“SNMP Suppor t” on page 9-9
The purpose of line backup is to provide a recover y mechanism in the event that the primar y 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 primar y WAN por t to using the Auxiliar y por t to which a modem has been
attached or to an internal asynchronous modem WAN module if one is installed. The por t 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 Auxiliar y por t is the backup por t. If an asynchronous modem WAN module is installed in the
second slot, then that is the backup por t.
In the event of a loss of primar y connectivity you have the option of switching back to the primar y por t
automatically once it has recovered its connection.
The suppor ted backup por ts are the Auxiliar y por t or an asynchronous modem WAN module in Switched
Asynchronous mode with PPP as the data link encapsulation.