ZyXEL Communications Vantage CNM 2.3 User Manual page 107

The following table describes the fields in this screen.
Table 30 Device Operation > Device Configuration > Network > WAN > Backup
(Prestige)
LABEL
Backup Type
Check WAN IP
Address1-3
Fail Tolerance
Recovery Interval
Timeout
Traffic Redirect
Traffic Active
Metric
Vantage CNM User's Guide
DESCRIPTION
Select the method that the device uses to check the DSL
connection.
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.
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.
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.
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".
Chapter 5 Device Network Settings
107