Role of the port. A port must have one of the following roles: cluster(1), data(2), mgmt(3), intercluster(4), cluster-mgmt(5) or undef(0). The cluster port is used to communicate to other node(s) in the cluster. The data port services clients' requests. It is where all the file requests come in. The management port is used by administrator to manage resources within a node. The intercluster port is used to communicate to other cluster. The cluster-mgmt port is used to manage resources within the cluster. The undef role is for the port that has not yet been assigned a role.