Draytek Vigor3900 User Manual page 320

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4 4 . . 8 8 . . 6 6 . . 1 1 H H i i g g h h A A v v a a i i l l a a b b
Available parameters are listed as follows:
Item
Enable High
Availability
Redundant Method
Settings under Hot
Standby
i i l l i i t t y y G G l l o o b b a a l l S S e e t t u u p p
Description
Check this box to enable HA function.
Choose Hot Standby or Active Standby as the method for HA.
Hot Standby –Hot Standby is a redundant method of having
several secondary service nodes running standby with another
identical primary service node. Upon failure of the primary
node, the system immediately elects one from all secondary
nodes to replace the failure one and take over the service.
While in the standby status, the secondary nodes are still
mirrored the configuration of primary in real time, thus the
whole systems are assured of having identical configuration.
Active Standby –Active Standby is a redundant method of
having the access points configured independently by
participating in HA session with individual LAN interface. As
an active gateway LAN, it routes user's traffic while others
stay in standby status.
Authentication Key – Type a string as the authentication key.
It is used for encrypting the HA session communication to
prevent malicious attack.
Advance Preemption Mode – Specify a mode for changing
the Config Synchronization Role.
312 Vigor3900 Series User's Guide