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Chapter 8 WAN Screens
ZyWALL 2WG User’s Guide
176
8.8.3 Spillover
To load balance using the spillover method, select Spillover in the Load Balancing
Algorithm field.
Configure the Route Priority metrics in the WAN General screen to determine the primary
and secondary WANs. By default, WAN 1 is the primary WAN and WAN 2 is the secondary
WAN.
Figure 111 Load Balancing: Spillover
The following table describes the related fields in this screen.
Interface This field displays the name of the WAN interface (WAN 1 and WAN 2).
Ratio Specify the weight for the interface. Enter 0 to set the ZyWALL not to send traffic load
to the interface. The higher the number, the bigger the weight (the more traffic sent).
Table 35 Load Balancing: Weighted Round Robin (continued)
LABEL DESCRIPTION
Table 36 Load Balancing: Spillover
LABEL DESCRIPTION
Active/Active
Mode
Select Active/Active Mode and set the related fields to enable load balancing on
the ZyWALL.
Load Balancing
Algorithm
Set the load balancing method to Spillover.
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.
Time Frame You can set the ZyWALL to get the measured bandwidth using the average
bandwidth in the specified time interval.
Enter the time interval between 10 and 600 seconds.
Send traffic to
secondary WAN
when primary
WAN bandwidth
exceeds
Specify the maximum allowable bandwidth on the primary WAN. Once this
maximum bandwidth is reached, the ZyWALL sends the new session traffic that
exceeds this limit to the secondary WAN. The ZyWALL continues to send traffic of
existing sessions to the primary WAN.