Miscellaneous Settings; High Availability - peplink ONE 20 User Manual

USER MANUAL
Peplink Balance Series

22 Miscellaneous Settings

The miscellaneous settings include configuration for high availability, PPTP server,
service forwarding, and service passthrough.

22.1 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 (e.g., a pair of Peplink
Balance 210 unitsor a pair of Peplink Balance 710 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 twoPeplink Balance 210 units
and two Internet connections:
In the diagram, the WAN ports ofeach Peplink Balance unit connect to the router andto
the modem.Both Peplink Balance unitsconnect to the same LAN switch via a LAN port.
An elaboration on the technical details of the implementationof virtual router redundancy
protocol (VRRP, RFC 3768) by the Balancefollows:

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.

In the event that no heartbeat signal from the master Peplink Balance unit is
received in 3 seconds (or longer) since the last heartbeat signal, the slave
Peplink Balance unit becomes active.

The slave Peplink Balance unit initiates the WAN connections and binds to a
previously configured LAN IP address.
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