Draytek Vigor2926L User Manual page 195

Available settings are explained as follows:
Item
Enable High Abailablity
Redundancy Method
Vigor2926 Series User's Guide
Description
Check this box to enable HA function.
Choose Hot-Standby or Active-Standby as the method for HA.
Hot-Standby -
Such method is suitable for a user which has one ISP account.
With such method;
All WANs of secondary routers will be shut down by HA

function.
WAN settings of primary and secondary routers can be

the same.
Note: When Hot-Standby is used, wireless LAN will be
"enabled" automatically for clients connecting to the
primary router; however, wireless LAN on secondary
router will be "disabled" directlly. Thus clients can
not connect to the secondary router any more.
Active-Standby -
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