ZyXEL Communications NBG410W3G Series User Manual

Chapter 6 WAN Screens

NBG410W3G Series User’s Guide

The following table describes the labels in this screen.

Table 16   NETWORK > WAN General

Active/Passive 

(Fail Over) Mode

The ZyXEL Device uses the second highest priority WAN interface as a back up. 

This means that the ZyXEL Device will normally use the highest priority (primary) 

WAN interface (depending on the priorities you configure in the Route Priority 

fields). The ZyXEL Device will switch to the secondary (second highest priority) 

WAN interface when the primary WAN interface's connection fails.

Fall Back to 

Primary WAN 

When Possible

This field determines the action the ZyXEL Device takes after the primary WAN 

interface fails and the ZyXEL Device starts using the secondary WAN interface.
Select this check box to have the ZyXEL Device change back to using the primary 

WAN interface when the ZyXEL Device can connect through the primary WAN 

interface again.
Clear this check box to have the ZyXEL Device continue using the secondary WAN 

interface, even after the ZyXEL Device can connect through the primary WAN 

interface again. The ZyXEL Device continues to use the secondary WAN interface 

until it's connection fails (at which time it will change back to using the primary 

WAN interface if its connection is up.

Route Priority

WAN1
WAN2
Traffic Redirect

The default WAN connection is “1” as your broadband connection via the WAN 

interface should always be your preferred method of accessing the WAN. The 

ZyXEL Device switches from WAN interface 1 to WAN interface 2 if WAN interface 

1's connection fails and then back to WAN interface 1 when WAN interface 1's 

connection comes back up. The default priority of the routes is WAN 1, WAN 2 and 

then Traffic Redirect: 
You have two choices for an auxiliary connection (WAN 2 and Traffic Redirect) in 

the event that your regular WAN connection goes down. 

Connectivity 

Check

Check Period

The ZyXEL Device tests a WAN connection by periodically sending a ping to either 

the default gateway or the address in the Ping this Address field.
Type a number of seconds (5 to 300) to set the time interval between checks. Allow 

more time if your destination IP address handles lots of traffic.

Check Timeout

Type the number of seconds (1 to 10) for your ZyXEL Device to wait for a response 

to the ping before considering the check to have failed. This setting must be less 

than the Check Period. Use a higher value in this field if your network is busy or 

congested.

Check Fail 

Tolerance

Type how many WAN connection checks can fail (1-10) before the connection is 

considered "down" (not connected). The ZyXEL Device still checks a "down" 

connection to detect if it reconnects.

Check WAN1/2 

Connectivity

Select the check box to have the ZyXEL Device periodically test the respective 

WAN interface's connection. 
Select Ping Default Gateway to have the ZyXEL Device ping the WAN interface's 

default gateway IP address.
Select Ping this Address and enter a domain name or IP address of a reliable 

nearby computer (for example, your ISP's DNS server address) to have the ZyXEL 

Device ping that address. For a domain name, use up to 63 alphanumeric 

characters (hyphens, periods and the underscore are also allowed) without 

spaces.