Chapter 7 WAN Setup
The following table describes the labels in this screen.
Table 25 WAN Backup Setup
LABEL | DESCRIPTION |
Backup Type | Select the method that the ZyXEL Device uses to check the DSL connection. |
| Select DSL Link to have the ZyXEL Device check if the connection to the DSLAM |
| is up. Select ICMP to have the ZyXEL Device periodically ping the IP addresses |
| configured in the Check WAN IP Address fields. |
Check WAN IP | Configure this field to test your ZyXEL Device's WAN accessibility. Type the IP |
address of a reliable nearby computer (for example, your ISP's DNS server | |
| address). |
| Note: If you activate either traffic redirect or dial backup, you must |
| configure at least one IP address here. |
| When using a WAN backup connection, the ZyXEL Device periodically pings the |
| addresses configured here and uses the other WAN backup connection (if |
| configured) if there is no response. |
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|
Fail Tolerance | Type the number of times (2 recommended) that your ZyXEL Device may ping the |
| IP addresses configured in the Check WAN IP Address field without getting a |
| response before switching to a WAN backup connection (or a different WAN |
| backup connection). |
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|
Recovery Interval | When the ZyXEL Device is using a lower priority connection (usually a WAN |
| backup connection), it periodically checks whether or not it can use a higher priority |
| connection. |
| Type the number of seconds (30 recommended) for the ZyXEL Device to wait |
| between checks. Allow more time if your destination IP address handles lots of |
| traffic. |
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|
Timeout | Type the number of seconds (3 recommended) for your ZyXEL Device to wait for a |
| ping response from one of the IP addresses in the Check WAN IP Address field |
| before timing out the request. The WAN connection is considered "down" after the |
| ZyXEL Device times out the number of times specified in the Fail Tolerance field. |
| Use a higher value in this field if your network is busy or congested. |
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|
Traffic Redirect | Traffic redirect forwards traffic to a backup gateway when the ZyXEL Device |
| cannot connect to the Internet. |
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|
Active Traffic | Select this check box to have the ZyXEL Device use traffic redirect if the normal |
Redirect | WAN connection goes down. |
| Note: If you activate traffic redirect, you must configure at least one |
| Check WAN IP Address. |
|
|
Metric | This field sets this route's priority among the routes the ZyXEL Device uses. |
| The metric represents the "cost of transmission". A router determines the best |
| route for transmission by choosing a path with the lowest "cost". RIP routing uses |
| hop count as the measurement of cost, with a minimum of "1" for directly |
| connected networks. The number must be between "1" and "15"; a number greater |
| than "15" means the link is down. The smaller the number, the lower the "cost". |
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|
Backup Gateway | Type the IP address of your backup gateway in dotted decimal notation. The |
| ZyXEL Device automatically forwards traffic to this IP address if the ZyXEL |
| Device's Internet connection terminates. |
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Apply | Click Apply to save the changes. |
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Cancel | Click Cancel to begin configuring this screen afresh. |
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