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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
The LIF that provides a dedicated IP address for managing a particular node and gets 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. Node-management LIFs can be configured on either node-management or data ports.

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.

Cluster-management LIF
The LIF that provides a single management interface for the entire cluster. Cluster-management LIFs can be configured on node-management or data ports.

The 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
The LIF that is used for intracluster traffic. Cluster LIFs can be configured only on cluster ports.
Cluster LIFs must always be created on 10-GbE network ports.
Note: Cluster LIFs need not be created on 10-GbE network ports in FAS2040 and FAS2220 platforms.

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.

Data LIF
The LIF that is associated with a Vserver and is used for communicating with clients. Data LIFs can be configured only on data ports.

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.

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