Syntax The mc admin uncordon command returns a cordoned node to active service after maintenance. This command notifies all other nodes in the cluster that the specified node is returning to service. When you run mc admin uncordon, the command: Removes the node from the cluster’s internal list of cordoned nodes. Notifies all peer nodes that the target node is returning to service. Allows peer nodes to re-establish grid connections to the node. See Node Maintenance for a complete procedure on cordoning and uncordoning nodes.