Chapter 6 WAN Setup
P-79X Series User’s Guide
58
The following table describes the labels in this screen.
Table 19 Network > Internet (WAN) > WAN Backup
LABEL DESCRIPTION
Backup Type 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.
Check WAN IP Address1-
3
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.
Fail Tolerance 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).
Recovery Interval 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.
Timeout 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 Traffic redirect forwards traffic to a backup gateway when the P-79X
cannot connect to the Internet.
Active Traffic Redirect 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.
Metric 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".
Backup Gateway 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.
Apply Click Apply to save the changes.
Cancel Click Cancel to begin configuring this screen afresh.
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