User`s guide

Chapter 5 WAN & 3G Cellular Screens
LAN-Cell 2 User’s Guide
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Figure 52 Load Balancing: Weighted Round Robin
The following table describes the related fields in this screen.
5.2.1.5 Spillover
With the spillover load balancing algorithm, the LAN-Cell sends network traffic to the
primary interface until the maximum allowable load is reached, then the LAN-Cell sends the
excess network traffic of new sessions to the secondary WAN interface. Configure the Route
Priority metrics in the WAN General screen to determine the primary and secondary WANs.
In cases where the primary WAN interface uses an unlimited access Internet connection and
the secondary WAN uses a per-use timed access plan, the LAN-Cell will only use the
secondary WAN interface when the traffic load reaches the upper threshold on the primary
WAN interface. This allows you to fully utilize the bandwidth of the primary WAN interface
while avoiding overloading it and reducing Internet connection fees at the same time.
In the following example figure, the upper threshold of the primary WAN interface is set to
800K. The LAN-Cell sends network traffic of a new session that exceeds this limit to the
secondary WAN interface.
Figure 53 Spillover Algorithm Example
Table 23 Load Balancing: Weighted Round Robin
LABEL DESCRIPTION
Active/Active
Mode
Select Active/Active Mode and set the related fields to enable load balancing on the
LAN-Cell.
Load Balancing
Algorithm
Set the load balancing method to Weighted Round Robin.
Interface This field displays the name of the WAN interface (WAN and Cellular).
Ratio Specify the weight for the interface. Enter 0 to set the LAN-Cell not to send traffic load
to the interface. The higher the number, the bigger the weight (the more traffic sent).