[CAUSE] The notification tmnxMcOmcrStatFailedChanged is generated when the value of the object tmnxMcOmcrStatFailed changes. The most interesting change is from 'notAct' to any of the other values; when an OMCR client application access protection instance (for example an SRRP instance) becomes active, the system will attempt to allocate resources for all associated client application entries (for example IPOE subscriber hosts); if this succeeds, the value of tmnxMcOmcrStatFailed becomes 'no', if it fails, it becomes 'yes'. [EFFECT] A transition from 'notAct' or 'no' to 'yes' means that the traffic of some or all associated client application entries' is being dropped. For example, all traffic from some or all of the IPOE subscriber hosts protected by a failed SRRP instance is dropped by this system. A transition to 'no' means that the system has successfully allocated resources for the traffic of all associated client application entries. A transition to 'notAct' means that this system is not performing the active role anymore for this access protection instance. For example, the value of the object tmnxSrrpOperState has become different from 'master' for the corresponding instance. [RECOVERY] There are three recovery actions possible, depending on the reason of the transition of the access protection instance. If it is caused by a problem in the access network, fix that problem, or make additional resources available for this access protection instance. If it is caused by a misconfiguration of this system, correct that, or make additional resources available for this access protection instance.