User`s guide

Chapter 5 WAN & 3G Cellular Screens
LAN-Cell 2 User’s Guide
101
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 is the primary WAN and Cellular is the secondary
WAN.
Figure 54 Load Balancing: Spillover
The following table describes the related fields in this screen.
5.2.2 WAN Connectivity Check
The WAN Connectivity Check feature will drop the specified interface if the indicated “peer”
IP address (or FQDN) does not respond to a sequence of ICMP packets. If the WAN Operation
Mode is “Fail-Over”, then traffic will be directed to the next highest priority WAN interface.
The LAN-Cell will periodically check the status of the down WAN interface and bring the
interface back up to check if the peer IP address has begun to respond again.
WAN Connectivity can be used to create a “heart-beat” for the LAN-Cell. When a WAN
interface is marked “Always-On”, direct the ICMP packets to the IP address (or FQDN) of a
network monitoring application to monitor the status of the LAN-Cell’s WAN interface. This
can also be used to “keep-alive” some WAN connections or applications if required.
See Table 19 on page 95 for details on configuring the WAN Connectivity Check feature.
Table 24 Load Balancing: Spillover
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 Spillover.
Time Frame You can set the LAN-Cell 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 LAN-Cell sends the new session traffic that
exceeds this limit to the secondary WAN. The LAN-Cell continues to send traffic of
existing sessions to the primary WAN.