Installation guide

active server. It must be configured as a static IP address, that is, not DHCP
(Dynamic Host Configuration Protocol) enabled. In the figure above, the IP
address is configured as 192.168.1.127. The Principal (Public) IP address
is shared by the active and passive servers in a LAN and is always available
on the currently active server in the cluster. In the event of a switchover or
failover, the Principal (Public) NIC is blocked on the previously active server
and is then available on the new active server. When configured, a Management
IP address will provide access to a server regardless of the role of the server.
Management IP Address
All servers in the cluster can be configured with Management IP addresses
that allow access to the server when the server is in the passive role. The
Management IP address is a static IP address in the same subnet as the
Principal (Public) IP address and is always available for administrators to access
the server.
SolarWinds Failover Engine Switchover and Failover
Processes
SolarWinds Failover Engine uses four different procedures – managed
switchover, automatic switchover, automatic failover, and managed failover –
to change the role of the active and passive servers depending on the status
of the active server.
•
Managed Switchover – You can click Make Active on the SolarWinds
Failover Manager Server: Summary page to manually initiate a managed
switchover. When a managed switchover is triggered, the running of
protected applications is transferred from the active machine to the passive
machine in the server pair. The server roles are reversed.
•
Automatic Switchover – Automatic switchover (auto-switchover) is similar
to failover (discussed in the next section) but is triggered automatically
when system monitoring detects failure of a protected application.
•
Automatic Failover – Automatic failover is similar to automatic switchover
(discussed above) but is triggered when the passive server detects that
the active server is no longer running properly and assumes the role of the
active server.
•
Managed Failover – Managed failover is similar to automatic failover in that
the passive server automatically determines that the active server has failed
and can warn the system administrator about the failure, but no failover
actually occurs until the system administrator manually triggers this
operation (the default configuration in a DR environment).
10 - Introduction
Installation Guide - SolarWinds Failover Engine