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Roles for LIFs

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.

node management LIF
A LIF that provides a dedicated IP address for managing a particular node in a cluster. Node management LIFs are created at the time of creating or joining the cluster. These LIFs are used for system maintenance, for example, when a node becomes inaccessible from the cluster.
cluster management LIF
A LIF that provides a single management interface for the entire cluster.

A cluster-management LIF can fail over to any node-management or data port in the cluster. It cannot fail over to cluster or intercluster ports.

cluster LIF
A LIF that is used to carry intracluster traffic between nodes in a cluster. Cluster LIFs must always be created on 10-GbE network ports.

Cluster LIFs 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.

data LIF
A LIF that is associated with a Storage Virtual Machine (SVM) and is used for communicating with clients.

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 an SVM management LIF by modifying its firewall policy to mgmt.

For more information about SVM 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.

intercluster LIF
A LIF that is used for cross-cluster communication, backup, and replication. You must create an intercluster LIF on each node in the cluster before a cluster peering relationship can be established.
These LIFs can only fail over to ports in the same node. They cannot be migrated or failed over to another node in the cluster.