User's Manual

USER MANUAL

Peplink Balance Series

21 Miscellaneous Settings

The miscellaneous settings include configuration for High Availability, PPTP Server, Service Forwarding,

and Service Passthrough.

21.1 High Availability

(Available on Peplink Balance 210+)

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 units,

or 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 implementation, by Peplink Balance, of Virtual Router

Redundancy Protocol (VRRP, RFC 3768) is as 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.

 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.

 At a subsequent point when the Master Peplink Balance unit recovers, it will once again become

active.

You can configure High Availability at the following location:Network>Misc. Settings > High Availability: