Draytek Vigor2830 Series User Manual page 49

Backup WAN/Backup Type – Determine the role of such
WAN interface. It will be changed according to the Active
Mode specified.
If you choose Always On as Active Mode, you can choose one
of the backup WAN interfaces from the Backup WAN drop
down list. Later, when such WAN is disconnected for some
reason, the backup WAN will be activated automatically to
prevent data transmission from connection interrupted.
If you choose Backup as the Active Mode, Backup WAN will
be changed into Backup Type. You have to specify which role
the WAN interface should play if you want to backup multiple
WANs. However, ignore this setting if you want to backup a
single WAN.
When any WAN disconnect – Such backup WAN will be
activated when any master WAN interface disconnects.
When all WAN disconnect – Such backup WAN will be
activated only when all master WAN interfaces disconnect.
Vigor2830 Series User's Guide
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