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Unified Services Router
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User Manual
DSR-1000, DSR-1000N, DSR-500 and DSR-500N support the traffic load balancing between
physical WAN port and the 3G USB Modem.
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 35: Load Balancing is available when multiple WAN ports are configured and
Protocol Bindings have been defined
3.4.3 Protocol Bindings
Network > Routing > Protocol Binding
Protocol bindings are useful 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 addresses
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