Motorola 3342 사용자 설명서

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 

 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.

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 

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 

Address.

The screen expands to allow you to enter an IP 
address of your 

Backup Gateway.

Click the 

 button; click the Aler t icon, 

and in the resulting page, click the 

 link.