Netopia 4000 Series, Software Manual

Page: 194 / 314

7-6 Firmware User Guide
backup mode and connect via your modem.
Note:
Backup and Recover y 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 par ticularly 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
primar y WAN link when it becomes available again. If you choose Automatic, the next two menu items
become visible.
Note: Automatic recover y only works upon loss of primar y WAN connectivity.
■ If you chose Automatic Recover y, 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 primar y 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 tr y 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 recover y checks.)
Use this setting with caution. Setting it to Yes may induce alternating switching between Backup and
Recover y Mode. This field will determine the recover y 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 primar y 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.