Unified Services Router User Manual
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Load balancing is particularly useful when the connection speed of one WAN port
greatly differs from another. In this case you can define protocol bindings to route
low-latency services (such as VOIP) over the higher-speed link and let low-volume
background traffic (such as SMTP) go over the lower speed link.
Figure 22: Load Balancing is available when multiple WAN ports are
configured and Protocol Bindings have been defined
3.4.3 Protocol Bindings
Advanced > Routing > Protocol Bindings
Protocol bindings are required when the Load Balancing feature is in use. Choosing
from a list of configured services or any of the user-defined services, the type of
traffic can be assigned to go over only one of the available WAN ports. For
increased flexibility the source network or machines can be specified as well as the
destination network or machines. For example the VOIP traffic for a set of LAN IP
addresses can be assigned to one WAN and any VOIP traffic from the remaining IP