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Chapter 5
the WAN ports. If one of the WAN links is down, iPBX30 will direct
the traffic destined for the downed WAN port to the still active WAN
port.
The line back up function is another feature supported to ensure
uninterrupted Internet access. When the primary WAN link is down,
the Internet access is automatically switched to the backup WAN
link.
5.3.1 WAN Load Balancing and Line Back Up
Configuration Parameters
The table below describes the configuration parameters available
for WAN load balancing and line back up.
Table 5.6. WAN Load Balancing and Line Back Up
Setting
Load Balance
W A N 1 / W A N 2
Bandwidth
C o n n e c t i v i t y
Check
42
Configuration Parameters
Description
Select one of the three available options:
Disable: disable both the WAN load balancing and line
back up functionalities.
Auto Mode: select this option if load balancing is desired.
The algorithm used for the load balancing is weighted
round robin. This option includes the functionality off line
backup. It is recommended that this option be selected.
Line Backup: select this option if line backup is needed. In
the existing implementation, the primary link is always set
to WAN1 and the backup link is always set to WAN2.
Enter the ratio of the traffic amount that you want to
distribute between the WANs. The number should be
between 0 to 100%. For example, 80% for WAN1 and 20%
for WAN2 means 80% of the traffic is directed to WAN1
and 20% of the traffic is directed to WAN2.
Click Enable or Disable radio button to enable or disable
this feature. Connectivity check is used to monitor the link
status for the WAN ports. If this option is disabled, iPBX30
will not perform fail-over; this means that if one of the WAN
links is down, the traffic directed to the downed link will not
be re-directed to the active link. It is recommended that you
keep this option enabled. However, if the gateway or the
specific network device that will be checked for connectivity
does not respond to ping, you
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