This procedure introduces the use of additional IP addresses on the principal network adapters of both the primary and secondary server for use during Split-brain Avoidance configuration.
Note: The IP addresses shown below are for illustration purposes only.
Please use IP addresses that are appropriate to your network ensuring that the IP addresses selected are not in the same subnet as the principal or SolarWinds Channel subnet.
FoE with LAN or WAN
To configure Split-brain Avoidance when implemented in a LAN, follow the steps below:
Using this procedure removes the problem of having multiple IP's on the same subnet and also removes all of the DNS registration issues
that can be seen as the above addresses are normally outside of the client's normal subnet.
This Knowledge Base article provides the procedure for configuring Split-Brain Avoidance when Orion Failover Engine is implemented in a Wide Area Network (WAN) environment.
Split-brain Avoidance can be configured after the installation of Orion Failover Engine via the SolarWinds Orion Failover Manager.
Split-brain Avoidance is used in WAN installations to ensure that only one server becomes active should the channel connection be lost, but both servers are still connected to the principal network.
Split-brain Avoidance works by "pinging" from the passive server to the active server across the principal network.
If the active server responds, failover will be prevented, even if the channel connection is lost.
This feature requires that the active and passive servers have different IP addresses on the principal network, which is typically the case for WAN installations.
To enable this feature:
You will need to configure "Auxiliary IP addresses" on both principal network cards.
This is required to allow the passive server to send a "ping". Auxiliary IP addresses are additional IP addresses that are assigned to the network card, which is connected to the principal network.
They are used to allow the passive server to communicate, because unlike the principal network address, they are not filtered.
This allows the passive server to send "pings", and is also required to allow the passive server to send email alerts.
To configure an auxiliary IP address on the principal network cards, follow the procedure below:
Note: If the management IP address will be configured on an additional network card,
SolarWinds Orion Failover Engine Packet Filter driver should not be enabled on this card to allow it to communicate over the network.
To configure a management address on the principal network card itself:
SolarWinds Orion Failover Manager
To configure Split-Brain Avoidance using the Solarwinds Orion Failover Manager, follow the steps below: