User's Manual

Pepwave MAX and Surf User Manual
http://www.pepwave.com
117
Copyright @ 2015 Pepwave
Miscellaneous Settings
The miscellaneous settings include configuration for high availability, PPTP server,
service forwarding, and service passthrough.
18.5 High Availability
Many Pepwave routers support high availability (HA) configurations via an open
standard virtual router redundancy protocol (VRRP, RFC 3768). In an HA configuration,
two Pepwave routers 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.
In the diagram, the WAN ports of each Pepwave router connect to the router and to the
modem. Both Pepwave routers connect to the same LAN switch via a LAN port.
An elaboration on the technical details of the implementation of the virtual router
redundancy protocol (VRRP, RFC 3768) by Pepwave routers follows:
 In an HA configuration, the two Pepwave routers communicate with each other
using VRRP over the LAN.
 The two Pepwave routers 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 Pepwave router is received
in 3 seconds (or longer) since the last heartbeat signal, the slave Pepwave router
becomes active.
 The slave Pepwave router initiates the WAN connections and binds to a
previously configured LAN IP address.
 At a subsequent point when the master Pepwave router recovers, it will once
again become active.