ZyXEL Communications 2WG manual 172

Chapter 8 WAN Screens

The following table describes the labels in this screen.

Table 33 NETWORK > WAN General

LABEL	DESCRIPTION
Active/Passive	Select the Active/Passive (fail over) operation mode to have the ZyWALL use the
(Fail Over) Mode	second highest priority WAN interface as a back up. This means that the ZyWALL
	will normally use the highest priority (primary) WAN interface (depending on the
	priorities you configure in the Route Priority fields). The ZyWALL will switch to the
	secondary (second highest priority) WAN interface when the primary WAN
	interface's connection fails.
Fall Back to	This field determines the action the ZyWALL takes after the primary WAN interface
Primary WAN	fails and the ZyWALL starts using the secondary WAN interface.
When Possible	Select this check box to have the ZyWALL change back to using the primary WAN
	interface when the ZyWALL can connect through the primary WAN interface again.
	Clear this check box to have the ZyWALL continue using the secondary WAN
	interface, even after the ZyWALL can connect through the primary WAN interface
	again. The ZyWALL 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.
Active/Active	Select Active/Active Mode to have the ZyWALL use both of the WAN interfaces at
Mode	the same time and allow you to enable load balancing.
Load Balancing	Select Least Load First, Weighted Round Robin or Spillover to activate load
Algorithm	balancing and set the related fields. Otherwise, select None.
	Refer to Section 8.8 on page 174 for load balancing configuration.
WAN Interface to	Select this option to have the ZyWALL send all of a local computer’s traffic through
Local Host	the same WAN interface for the period of time that you specify (1 to 600 seconds).
Mapping Timeout	This is useful when a redirect server forwards a local user’s request for a file and
	informs the file server that a particular WAN IP address is requesting the file. If the
	user’s subsequent sessions came from a different WAN IP address, the file server
	would deny the request.
	This field is configurable only when you select Active/Active Mode and enable
	load balancing.
Route Priority
WAN1	The default WAN connection is "1' as your broadband connection via the WAN
WAN2	interface should always be your preferred method of accessing the WAN. The
Traffic Redirect	ZyWALL 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
Dial Backup
	connection comes back up. The default priority of the routes is WAN 1, WAN 2,
	Traffic Redirect and then Dial Backup:
	You have three choices for an auxiliary connection (WAN 2, Traffic Redirect and
	Dial Backup) in the event that your regular WAN connection goes down. If Dial
	Backup is preferred to Traffic Redirect, then type "14" in the Dial Backup
	Priority (metric) field (and leave the Traffic Redirect Priority (metric) at the
	default of "15").
	The Dial Backup field is available only when you enable the corresponding dial
	backup feature in the Dial Backup screen.
Connectivity
Check
Check Period	The ZyWALL 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 ZyWALL 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.

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	ZyWALL 2WG User’s Guide