Groupnets are the configuration level for managing multiple tenants on your external network. DNS client settings, such as nameservers and a DNS search list, are properties of the groupnet. Groupnets reside at the top tier of the networking hierarchy. You can create one or more subnets within a groupnet.
Subnets simplify external (front-end) network management and provide flexibility in implementing and maintaining the cluster network. You can create IP address pools within subnets to partition your network interfaces according to workflow or node type.
The IP address pool of a subnet consists of one or more IP address ranges. IP address pools can be associated with network interfaces on cluster nodes. Client connection settings are configured at the IP address pool level.
An initial external network subnet is created during the setup of your cluster with the following configuration:
- An initial groupnet called groupnet0 with the specified global, outbound DNS settings to the domain name server list and DNS search list, if provided.
- An initial subnet called subnet0 with the specified netmask, gateway, and SmartConnect service address.
- An initial IP address pool called pool0 with the specified IP address range, the SmartConnect zone name, and the network interface of the first node in the cluster as the only pool member.
- An initial node provisioning rule called rule0 that automatically assigns the first network interface for all newly added nodes to pool0.
- Adds subnet0 to groupnet0.
- Adds pool0 to subnet0 and configures pool0 to use the virtual IP of subnet0 as its SmartConnect service address.