Features With Multiple Wan Links; Auto Failover; Figure 30: Traffic Selector Configuration - D-Link DSR-250N User Manual

Unified Services Router

Figure 30: Traffic Selector Configuration

3.4

Features with Multiple WAN Links

This router supports multiple WAN links. This allows you to take advantage of failover and load
balancing features to ensure certain internet dependent services are prioritized in the event of unstable
WAN connectivity on one of the ports.
Setup > Internet Settings > WAN Mode
To use Auto Failover or Load Balancing, WAN link failure detection must be configured. This
involves accessing DNS servers on the internet or ping to an internet address (user defined). If
required, you can configure the number of retry attempts when the link seems to be disconnected or
the threshold of failures that determines if a WAN port is down.

3.4.1 Auto Failover

In this case one of your WAN ports is assigned as the primary internet link for all internet traffic.
The secondary WAN port is used for redundancy in case the primary link goes down for any reason.
Both WAN ports (primary and secondary) must be configured to connect to the respective ISP's
before enabling this feature. The secondary WAN port will remain unconnected until a failure is
detected on the primary link (either port can be assigned as the primary). In the event of a failure on
the primary port, all internet traffic will be rolled over to the backup port. When configured in Auto
Failover mode, the link status of the primary WAN port is checked at regular intervals as defined by
the failure detection settings.
Note that bothWAN1, WAN2 and WAN3 can be configured as the primary internet link.
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Auto-Rollover using WAN port
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Primary WAN: Selected WAN is the primary link (WAN1/WAN2/WAN3)
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