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10.16 Misc. Settings
10.16.1 High Availability
The Peplink Balance supports high availability (HA) configurations via an open standard virtual
router redundancy protocol (VRRP, RFC 3768).
In an HA configuration, two same-model Peplink Balance units provide redundancy and failover
in a master-slave arrangement. In the event that the master unit is down, the slave unit
becomes active.
High availability will be disabled automatically where there is a drop-in connection configured on
a LAN bypass port.
The following diagram illustrates an HA configuration with two Peplink Balance units and two
Internet connections:
In the diagram, the WAN ports of each Peplink Balance unit connect to the router and to the
modem. Both Peplink Balance units connect to the same LAN switch via a LAN port.
An elaboration on the technical details of the implementation of virtual router redundancy
protocol (VRRP, RFC 3768) by the Balance follows:
● In an HA configuration, the two Peplink Balance units communicate with each other
using VRRP over the LAN.
● The two Peplink Balance units broadcast heartbeat signals to the LAN at a frequency of
one heartbeat signal per second.