Example 2; Figure 48 Least Load First Example; Table 40 Least Load First: Example 1; Table 41 Least Load First: Example 2 - ZyXEL Communications ZyWall 35 User Manual

Figure 48 Least Load First Example

If the outbound bandwidth utilization is used as the load balancing index and the measured
outbound throughput of WAN 1 is 412K and WAN 2 is 198K, the ZyWALL calculates the
load balancing index as shown in the table below.
Since WAN 2 has a smaller load balancing index (meaning that it is less utilized than WAN 1),
the ZyWALL will send the subsequent new session traffic through WAN 2.

Table 40 Least Load First: Example 1

INTERFACE
WAN 1
WAN 2

7.4.1.2 Example 2

This example uses the same network scenario as in
inbound bandwidth utilization in calculating the load balancing index. If the measured
inbound stream throughput for both WAN 1 and WAN 2 is 102K, the ZyWALL calculates the
average load balancing indices as shown in the table below.
Since WAN 1 has a smaller load balancing index (meaning that it is less utilized than WAN 2),
the ZyWALL will send the next new session traffic through WAN 1.

Table 41 Least Load First: Example 2

INTERFACE
WAN 1
WAN 2
Chapter 7 WAN Screens
OUTBOUND
AVAILABLE (A)
512 K
256 K
OUTBOUND
AVAILABLE MEASURED
(OA) (OM)
512 K 412 K
256 K 198 K
MEASURED (M)
412 K 0.8
198 K 0.77
Figure 48, but uses both the outbound and
INBOUND
AVAILABLE MEASURED
(IA) (IM)
256 K 102 K
128 K 102 K
ZyWALL 35 User's Guide
LOAD BALANCING INDEX
(M/A )
AVERAGE LOAD
BALANCING INDEX
(OM / OA + IM / IA) / 2
( 0.8 + 0.4) / 2 = 0.6
( 0.77 + 0.8 ) / 2 = 0.79
141