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5
High Availability
The High Availability support in the router is an ideal solution for businesses requiring
uninterrupted, low cost internet connectivity. The router supports Dual Ethernet WAN
Ports for xDSL connectivity. Though xDSL connectivity is cheap, it is more susceptible
to outages. Hence with two xDSL links, DRO-210i guarantees uninterrupted internet
connectivity.
High Availability is made possible through two key features in the router - Auto Backup
and Load Balancing.
5.1 Auto Backup
The Auto Backup feature enables one of the WAN links to function as the Primary WAN
Link, and the other as the Backup Link. When the Primary Link fails, the Backup Link
will become operational and traffic will switchover to this link. And when the Primary
Link becomes serviceable, the traffic will automatically switchback to the Primary Link.
Select Interface → → → → AutoBackup to configure the Backup Configuration as explained
below.
When the Primary Link fails, all configurations (other than VPN and SIP-ALG) made for
the Backup Interface will become active. That is, the connection type for the WAN
interface, Static Routes configured on this interface, NAT configured on this interface
etc. will be automatically activated on the backup interface. And when the Primary Link
becomes UP, the configurations on the Backup interface will be disabled and the
configurations on the Primary Interface will be made active. This switchover and
switchback will occur automatically without need for user intervention.
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