OAM

All nodes on a shared protection ring perform OAM on their working channels and check channel connectivity using continuity check (CC) packets. Protection switching is triggered on the ring once a fault is detected.

Navigation Path

In the NE Explorer, select an NE and choose Configuration > Packet Configuration > MPLS Management > MPLS-TP Shared Protection Ring Management from the Function Tree, click the OAM tab.

Buttons

Button		Description
Query OAM State		Queries the local and remote OAM status in a specified direction. This button is available only after the local and remote OAM is enabled.

Parameters

**Table 1** Descriptions of the parameters for OAM
Field	Value	Description
Direction	East, West	Indicates the direction in which OAM is initiated on a shared protection ring.
OAM Recommendation	Y.1711	Indicates the OAM recommendation used for a shared protection ring.
Enable State	Enabled, Disabled	Indicates the OAM status of a shared protection ring. NOTE: Configure all ring channels before enabling OAM. Do not disable OAM if APS is enabled.
EXP	None, 0 to 7	Indicates the priority of OAM packets on a shared protection ring. A larger value indicates a higher priority. For example, the value 7 indicates the highest priority. Queue scheduling and packet discarding depend on the value of this parameter. For a new shared protection ring, when its OAM Recommendation is set to Y.1731, the value of EXP ranges from 0 to 7. When OAM Recommendation switches from Y.1711 to Y.1731, the value of EXP can only be 7. When OAM Recommendation is Y.1711, the value of EXP is None.
SD Threshold(%)	0 to 100	Indicates the signal degrade (SD) threshold. When the packet loss rate of OAM packets on a channel is higher than this threshold, an SD alarm is reported.
SF Threshold(%)	0 to 100	Indicates the signal fail (SF) threshold. When the packet loss rate of OAM packets on a channel is higher than this threshold, an SF alarm is reported. The SF threshold must be greater than the SD threshold.
Refreshment Frequency(ms)	3.3, 10, 100, 1000	Indicates the interval for transmitting CC packets to detect channel faults.
Local OAM Status	Initialized, Near-End Available, Near-End Defect Available, Near-End Defect Unavailable, Near-End Unavailable	Indicates the local OAM status. OAM status is calculated based on CC packets transmitted by two ends of a link.
Local OAM Defect Type	dServer, dPeerME, dLOCV, dTTSI_Mismatch, dTTSI_Mismerge, dExcess, dUnknown	Indicates the local OAM defect type.
Local OAM Disabled Duration(ms)	None, 0 to 300000	Indicates the duration of unavailable local OAM.
Local OAM Defect Location	Example: 192.168.11.1	Indicates the IP address that identifies the local OAM defect.
Remote OAM Status	Remote Available, Remote Defect Available, Remote Defect Unavailable, Remote Unavailable	Indicates the remote OAM status. Remote OAM status is the OAM status of the port on the next node where local CC packets arrive.
Remote OAM Defect Type	dServer, dPeerME, dLOCV, dTTSI_Mismatch, dTTSI_Mismerge, dExcess, dUnknown	Indicates the remote OAM defect type.
Remote OAM Disable Duration(ms)	None, 0 to 300000	Indicates the duration of unavailable remote OAM.
Remote OAM Defect Location	Example: 192.168.11.10	Indicates the IP address that identifies the remote OAM defect.