ZyXEL Vantage CNM User Guide - Page 107

Chapter 5 Device Network Settings The following table describes the fields in this screen. Table 30 Device Operation > Device Configuration > Network > WAN > Backup (Prestige) LABEL DESCRIPTION Backup Type Select the method that the device uses to check the DSL connection. Check WAN IP Address1-3 Select DSL Link to have the device check if the connection to the DSLAM is up. Select ICMP to have the device periodically ping the IP addresses configured in the Check WAN IP Address type fields. Configure this field to test your device's WAN accessibility. Type the IP address of a reliable nearby computer (for example, your ISP's DNS server address). If you activate either traffic redirect or dial backup, you must configure at least one IP address here. Fail Tolerance Recovery Interval When using a WAN backup connection, the device periodically pings the addresses configured here and uses the other WAN backup connection (if configured) if there is no response. Type the number of times (2 recommended) that your 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). When the device is using a lower priority connection (usually a WAN backup connection), it periodically checks to whether or not it can use a higher priority connection. Timeout Traffic Redirect Traffic Active Type the number of seconds (30 recommended) for the device to wait between checks. Allow more time if your destination IP address handles lots of traffic. Type the number of seconds (3 recommended) for your 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 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. Select this check box to have the device use traffic redirect if the normal WAN connection goes down. Metric If you activate traffic redirect, you must configure at least one Check WAN IP Address. This field sets this route's priority among the routes the 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". Vantage CNM User's Guide 107