Motorola Netopia 7000, Руководство администратора

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Link: Backup
The purpose of 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 loss
of end-to-end connectivity. Detection of one of these failures causes the Gateway to switch from using the
primar y DSL WAN connection to an alternate gateway on the Ethernet LAN. In the event of a loss of primar y
connectivity you have the option of switching back to the primar y circuit automatically once it has recovered
its connection.
A typical application would be to have a LAN connection from your Gateway to another Gateway that has, for
example, another DSL modem or Gateway connection to the Internet, and designating the second gateway
as the backup gateway. Should the primar y WAN connection fail, traffic would be automatically redirected
through your alternate gateway device to maintain Internet connectivity.
When you click the
Backup
link, the Backup Options page
appears.
Select either
manual
or
automatic
from the pull-down menu.
•
If you choose manual , you will have to switch manually to your
alternate gateway in the event of a connection failure.
•
For fail-over purposes, choose
automatic
.
Manual options
If you choose manual, you can also choose Auto Recover y. If you chose Auto Recovery , enter the number
of minutes that the system should wait before it assumes that a connection has been re-established. This
allows you to be sure that the primar y WAN connection is well re-established before the Gateway switches
back to it from the backup mode. Minimum value is one minute.
•
Check the
Enable Backup Gateway
checkbox.
•
From the pull-down menu, select the Interface
Type
to which you want to direct the backup con-
nection. If you have defined multiple VCCs, you
can choose a secondar y one. Other wise, to
backup to an IP device on the LAN, choose
IP
Address
.
The screen expands to allow you to enter an IP
address of your
Backup Gateway
.
Click the
Submit
button; click the Aler t icon,
and in the resulting page, click the
Save and Restart
link.