IPMP supports failure detection in an anonymous group. By default, IPMP monitors the status only of interfaces that belong to IPMP groups. However, the IPMP daemon can be configured to also track the status of interfaces that do not belong to any IPMP group. Thus, these interfaces are considered to be part of an anonymous group. When you issue the ipmpstat –g command, the anonymous group is displayed as double-dashes (--). In anonymous groups, the interfaces have data addresses that also function as test addresses. Because these interfaces do not belong to a named IPMP group, these addresses are visible to applications. To enable the tracking of interfaces that are not part of an IPMP group, see How to Configure the Behavior of the IPMP Daemon.