Network Architecture; Figure 43 Network Architecture Of High Availability Cluster - Aruba Networks PowerConnect W Clearpass 100 Software Deployment Manual

A cluster's virtual IP address is a unique IP address that will always be assigned to the primary node of the
cluster. In order to take advantage of the cluster's fault tolerance, all clients that use the cluster must use
the cluster's virtual IP address, rather than each node's IP address.
Replication is the process of ensuring that the secondary node maintains an exact copy of the primary
node's database contents and configuration. Replication is used to ensure that if a failover is required, the
secondary node can continue to deliver an uninterrupted service to clients of the cluster.
See "About High Availability Systems"
Keep-alive
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Database replication.
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Configuration replication
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Downtime threshold
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Network Architecture

The figure below shows the network architecture for a high availability cluster.
Figure 43
The key points to note about this architecture are:
The RADIUS and Web server protocols (HTTP and HTTPS) are supported by the cluster.

The cluster has three IP addresses: each node has its own IP address, and there is a virtual IP address for

the cluster which will always be assigned to the primary node in the cluster.
For the cluster to provide failover redundancy, all network access servers and operators must use the

cluster's IP address.
The network administrator should use the node IP addresses to perform system administration tasks on

each node, including managing the cluster itself.
348 | High Availability Services
Network architecture of high availability cluster
for the following settings and procedure..
Amigopod 3.7 | Deployment Guide