A LIF role determines the kind of traffic that is supported over the LIF, along with the failover rules that apply and the firewall restrictions that are in place. A LIF can have any one of the five roles: node management, cluster management, cluster, intercluster, and data.
The node-management LIF can fail over to other data or node-management ports on the same node.
Sessions established to SNMP and NTP servers use the node-management LIF. AutoSupport requests are sent from the node-management LIF.
The LIF can fail over to any node-management or data port in the cluster. It cannot fail over to cluster or intercluster ports.
These interfaces can fail over between cluster ports on the same node, but they cannot be migrated or failed over to a remote node. When a new node joins a cluster, IP addresses are generated automatically. However, if you want to assign IP addresses manually to the cluster LIFs, you must ensure that the new IP addresses are in the same subnet range as the existing cluster LIFs.
You can have multiple data LIFs on a port. These interfaces can migrate or fail over throughout the cluster. You can modify a data LIF to serve as a Vserver management LIF by modifying its firewall policy to mgmt.
For more information about Vserver management LIFs, see the Clustered Data ONTAP System Administration Guide for Cluster Administrators.
Sessions established to NIS, LDAP, Active Directory, WINS, and DNS servers use data LIFs.