ZyXEL Communications Prestige 128Plus, Руководство пользователя, Страница: 70 / 203

Prestige 128+ ISDN Router
3-16 Internet Access
At this point, your Prestige will ask if you wish to test the Internet connection. If
you select
Yes , the Prestige will call the ISP and test the configuration. If the
test fails, note the error messages on the screen and take the appropriate
troubleshooting steps.
3.6 Configuring Backup ISP Accounts
If you have more than one ISP account, you can configure the secondary ISP as a
backup. You can switch to the backup ISP in the event that the primary ISP is
out of service. The SUA feature can be enabled for all these accounts.
3.6.1 Configure a Backup ISP
To configure a backup ISP Account, follow these steps:
Step 1.
Configure your primary ISP using Menu 4, as described earlier in this
chapter.
Step 2.
Enter Menu 11, then select an unused remote node.
Step 3.
In Menu 11.1, choose a name for your backup ISP account, then set the
Active field to No , and enter your outgoing login name, password, and
phone number(s). The Remote IP Address field should be set to
1.1.1.1 .
Step 4.
In Menu 11.3, set the remote node's subnet mask to
0.0.0.0
, and set
RIP to None .
Step 5.
Save the new configuration.
Please note that the remote IP address of 1.1.1.1 is only a placeholder to avoid
conflicting with that of the primary ISP, which is implicitly set at 0.0.0.0 . When
the backup ISP is activated, the remote IP address of 1.1.1.1 combined with the
subnet mask of 0.0.0.0 creates a default route that is equivalent to the one
derived form the primary ISP.