PowerScale OneFS 9.8.0.0 Web Administration Guide

IP address allocation

The IP address allocation policy specifies how IP addresses in the pool are assigned to an available network interface.

You can specify whether to use static or dynamic allocation.

Static

Assigns one IP address to each network interface added to the IP address pool, but does not guarantee that all IP addresses are assigned.

Once assigned, the network interface keeps the IP address indefinitely, even if the network interface becomes unavailable. To release the IP address, remove the network interface from the pool or remove it from the node.

Without a license for SmartConnect Advanced, static is the only method available for IP address allocation.

Dynamic

Assigns IP addresses to each network interface added to the IP address pool until all IP addresses are assigned. This guarantees a response when clients connect to any IP address in the pool.

If a network interface becomes unavailable, its IP addresses are automatically moved to other available network interfaces in the pool as determined by the IP address failover policy.

This method is only available with a license for SmartConnect Advanced.

Externally Managed

In cloud deployments, the ExternallyManaged allocation method is available. This allocation method was designed to allow cloud providers to dictate the placement of Primary IPs. Pools of this allocation method are created and managed by SmartConnect, and thus cannot be edited or changed from ExternallyManaged. Externally managed network pools can only be created by the system. Pools cannot be changed to be externally managed, and pools cannot be changed from externally managed. This configuration is to prevent accidental misconfigurations.

You can modify the IPs in an externally managed network pool using the isi network pool modify subnet0.pool0 --force --add-ranges command.

Note that if you are adding new IPs to the front-end subnet on the cloud provider, you must extend the range in OneFS using the --force parameter.