Chapter 8 WAN and 3G Screens
ZyWALL 2WG User’s Guide
171
The following table describes the labels in this screen.
Table 31
NETWORK > WAN > General
LABEL
DESCRIPTION
Active/Passive
(Fail Over) Mode
Select the Active/Passive (fail over) operation mode to have the ZyWALL use the
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
Primary WAN
When Possible
This field determines the action the ZyWALL takes after the primary WAN interface
fails and the ZyWALL starts using the secondary WAN interface.
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
Mode
Select
Active/Active Mode
to have the ZyWALL use both of the WAN interfaces at
the same time and allow you to enable load balancing.
Load Balancing
Algorithm
Select
Least Load First
,
Weighted Round Robin
or
Spillover
to activate load
balancing and set the related fields. Otherwise, select
None
.
Refer to
for load balancing configuration.
WAN Interface to
Local Host
Mapping Timeout
Select this option to have the ZyWALL send all of a local computer’s traffic through
the same WAN interface for the period of time that you specify (1 to 600 seconds).
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
WAN2
Traffic Redirect
Dial Backup
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
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
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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