Persistent node IP labels

A persistent node IP label is a useful administrative tool that lets you contact a node even if the PowerHA® SystemMirror® cluster services are down on that node.

When you define persistent node IP labels PowerHA SystemMirror attempts to put an IP address on the node. Assigning a persistent node IP label to a network on a node allows you to have a node-bound IP address on a cluster network that you can use for administrative purposes to access a specific node in the cluster. A persistent node IP label is an IP alias that can be assigned to a specific node on a cluster network and that:

• Always stays on the same node (is node-bound )
• Co-exists on a network interface card that already has a service IP label defined
• Does not require installing an additional physical network interface card on that node
• Is not part of any resource group .

There can be one persistent node IP label per network per node.