Notifications and symptomatic events

Notifications Generated by the Optical Transport Manager lists the notifications generated by the Optical Transport Manager for optical network elements and network connections for SONET/SDH networks.

Table 1. Notifications Generated by the Optical Transport Manager

Managed Element	Notification	Condition
Card or Equipment	Down	A Card or Equipment device in a network element has failed.
PTP	Down	A PTP on a network element has failed.
	PTPHardFailureCondition	A hard failure indication has been observed on this PTP.
OpticalNetworkElement	Down	The EMS has lost management connection with the NE.
TopologicalLink	Down	No traffic is passing through the link in one or both directions and symptoms may indicate fiber failure.
	SignalDegrade	Traffic is passing through the link but symptoms indicate that the signal is degraded.
DropSideTopologicalLink	Down	The drop side topological link is down.
	SignalDegrade	A signal degrade (soft failure) occurs when the signal error rate reaches a threshold. The impact is a function of the device specification; however, if there is an impact, it will be very similar to Fiber Cut.
Conduit	Down	No traffic is passing through the link in one or both directions and symptoms may indicate fiber failure. Physical failure of the link bundle that comprises topological links.
BBTopologicalLink	Down	No traffic is passing through the unmanaged segment in one or both directions.
	SignalDegrade	Traffic is passing through the link but symptoms indicate that the signal is degraded.
BBDropSideTopologicalLink	Down	The edge, unmanaged segment is down.
	SignalDegrade	A signal degrade (soft failure) occurs when the signal error rate reaches a threshold. The impact is a function of the device specification; however, if there is an impact, it will be very similar to Fiber Cut.
HighOrder_Trail	TrailDown	This facility is down.
	TrailAtRisk	One element of a protection group is down. Communication continues, but without the security of redundancy.
HighOrder_Circuit	ServiceUnavailable	This facility is down. May be a result of TransportOutgoingFail, TransportIncomingFail, or TransportFail.
	ServiceAtRisk	One element of a protection group is down. Communication continues, but without the security of redundancy.
EMS	Disconnected	There is a loss of communication with the EMS.
	EmsAdapterNotRunning	The VMware Smart Assurance EMS adapter has shut down.
	EmsAdapterDisconnected	The VMware Smart Assurance EMS adapter is not responding.

The following sections describe the root-cause problems and related symptoms for some optical network elements and network connections.