ZyXEL Communications P-793H v3 User Manual page 58

The following table describes the labels in this screen.
Table 19 Network > Internet (WAN) > WAN Backup
LABEL
Backup Type
Check WAN IP Address1-
3
Fail Tolerance
Recovery Interval
Timeout
Traffic Redirect
Active Traffic Redirect
Metric
Backup Gateway
Apply
Cancel
Chapter 6 WAN Setup
DESCRIPTION
Select the method that the P-79X uses to check the DSL connection.
Select DSL Link to have the P-79X check if the connection to the DSLAM
is up. Select ICMP to have the P-79X periodically ping the IP addresses
configured in the Check WAN IP Address fields.
Configure this field to test your P-79X'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 P-79X 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 P-79X 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 P-79X 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 P-79X 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 P-79X 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 P-79X 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.
Traffic redirect forwards traffic to a backup gateway when the P-79X
cannot connect to the Internet.
Select this check box to have the P-79X use traffic redirect if the normal
WAN connection goes down.
Note: 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 P-79X 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".
Type the IP address of your backup gateway in dotted decimal notation.
The P-79X automatically forwards traffic to this IP address if the P-79X's
Internet connection terminates.
Click Apply to save the changes.
Click Cancel to begin configuring this screen afresh.
P-79X Series User's Guide
58