Install guide

WAN Load Balancing 1-7
Software Version 2.7.5
C613-10454-00 REV A
Assigning Weights
For weighted least connect and weighted lottery, the WAN port's assigned
weight influences how often the WAN port will be selected. A good rule of
thumb is to base this weight on the link's bandwidth. For situations where the
underlying bandwidth of a WAN port is not known, or the bandwidth does not
reflect the actual achievable throughput, WAN load balancer provides two
alternatives; Automatic, and Perfect Automatic, weightings.
Automatic Weight
This method assigns a weight based on the port speed of your WAN interface.
The WAN port's weight is automatically set to the speed of the link (in bits per
second) divided by 1000. Therefore, a 10 Mbps link, has a weight of:
Where a port has autonegotiated its speed, the load balancer uses the
negotiated speed for its weight calculation.
Where several IP interfaces use the same physical interface, the automatic
weighting does not reflect the actual IP throughput that the interface is capable
of. For this reason, you should not use automatic weighting with PPP links
over Eth, VLAN, or L2TP interfaces.
Perfect Automatic Weight
This method assigns a weight based on throughput measurements taken by an
adaptive bandwidth detection (ABD) process. ABD calculates a WAN port’s
available bandwidth based on the average throughput of its IP interface
measured over small preset resolution periods. After a predefined update interval
has expired, the ABD process records the maximum value from the individual
averages observed during this interval, and uses this as the WAN port's weight
for the next update interval.
Port Speed (bps)
1000
-------------------------------------------
10000000
1000
------------------------ 10000==