Netopia 4000-Series manual Firmware User Guide

7-6 Firmware User Guide

backup mode and connect via your modem.

Note: Backup and Recovery have resolutions of five seconds. This is how often the router evaluates the state of the connections and makes decisions.

■Select Ping Host Name or IP Address and enter an IP address or resolvable DNS name that the router will ping. This is an optional item that is particularly useful for testing if the remote end of a VPN connection has gone down. Should this address become unreachable the router will treat this as a loss of connectivity and begin the backup timer. This loss is a Layer 2 loss.

■Select Recovery to “WAN_name” (where WAN_name is the type of WAN connection you have, e.g., ADSL) and press Return. Choose either Manual or Automatic to determine how the system will return to the primary WAN link when it becomes available again. If you choose Automatic, the next two menu items become visible.

Note: Automatic recovery only works upon loss of primary WAN connectivity.

■If you chose Automatic Recovery, select Requires Recovery of... and press Return. A pop-up menu allows you to choose among 30 Sec(onds), 1 Min(ute), 2 Min(utes), 5 Min(utes), 10 Min(utes), or 15 Min(utes). This allows you to be sure that the primary WAN connection is well re-established before the router switches back to it from the backup mode.

■You can toggle Auto-Recovery on loss of Layer 2 to Yes or No (the default). This setting determines whether the router should try to Auto-Recover when the backup is invoked because of a Layer 2 loss, for example, a no valid Connection Profile. (Layer 1 is still available, and this is what recovery checks.) Use this setting with caution. Setting it to Yes may induce alternating switching between Backup and Recovery Mode. This field will determine the recovery behavior of a Manual backup and Ping failure backup. These two failures are treated as Layer 2 failure.

■Select Clear Backup Call only if idle. The default Yes will prevent the backup call from being torn down if there is activity on the backup connection when the primary connection comes back up. You can toggle this to No if you wish.

■Requires idle time of (seconds) specifies how long the device should wait before permitting the call to be torn down after a period of inactivity.

■Data Link Encapsulation is set to Async PPP. This field is not editable.