Prerequisites

To configure an Active/Passive cluster, the following prerequisites must be fulfilled.

•Pulse One Appliances – two Pulse One appliances are required:

•One will be the Active node and the other will be the Passive node.

•The Active node must be fully configured.

•The Passive node must have configured Internal and External network interfaces (see below), but typically has a configured management interface also.

•SSH access – to the management interface of the Active and Passive nodes.

•NFS servers – configure any required NFS servers before starting to create the cluster, see Mounting an NFS Server on a Pulse One Appliance.

•DNS – to enable automatic failover of Active to Passive, the hostname of the cluster must resolve to the IP addresses of both the Active node and the Passive node.

•Managed appliances – all managed appliances must run version 9.0R2 or above.

•Network connectivity between the Internal interfaces – Pulse One state synchronization occurs only via the internal network interface cards (NICs). Please ensure that the internal interface on the Active node can communicate with the Internal interface on the Passive node. See Configuring Internal Interfaces.

•Ports between the Active and Passive nodes – The following ports needs to be open in the data centers for bi-directional communication between the Pulse One machine.

Protocol	Port	Purpose
TCP/UDP	•4500 and 500 (IPSec) •27017 (Mango DB) •3306 (Mysql) •9200 and 9210 (Log indexer) • 9300 and 9310 (Log indexer) •514, 8514, 5149, and 5148 (Log collector)	•Secure channel service. This is the communication port between the clustered nodes. •Pulse One recommends that IPv4 Protocol 51 is enabled.

For more information on ports opening for different kinds of data centers for bi-directional communication between the Pulse One machine refer to KB.