MPLS resource threshold-related alarms can be configured on a device to enable the device to report an alarm if the number of MPLS resources of a specified type reaches the upper limit. The alarms facilitate operation and maintenance.
If the proportion of used MPLS resources, such as LSPs and dynamic labels to all supported ones reaches a specified upper limit, new MPLS services may fail to be established because of insufficient resources. To facilitate operation and maintenance, an upper alarm threshold of MPLS resource usage can be set. If MPLS resource usage reaches the specified upper alarm threshold, an alarm is generated.