Cluster virtual IP configuration
Cluster Virtual IP (VIP) configuration in a Cohesity SpanFS environment is designed to provide high availability, load balancing, and simplified cluster access. Even though the NetBackup Direct-IO plug-in provides intelligent data path allocation dynamically for NetBackup jobs to cluster nodes, the cluster virtual IP increases the resiliency and balancing of the control path. By using a single virtual host name, systems like NetBackup can interact with the cluster without needing to manage individual node details.
Besides cluster node IPs, this setup uses floating VIPs that are not tied to specific nodes. These IPs can shift between nodes if any node undergoes an outage and ensures that all control traffic is always serviced.
The following are two primary approaches to configure the cluster VIPs:
Using external DNS server
Using DNS delegation