Monitoring Ethernet OAM Link Fault Mangement
To display operation, administration, and management (OAM) link fault management information for Ethernet interfaces on the routing platform, select Troubleshoot > Ethernet OAM > View Link Fault Mgmt in the J-Web interface.
 | Note: After you make changes to the configuration in this window, you must commit the changes immediately for them to take effect. To commit all changes to the active configuration, select Commit Options > Commit. See Using the Commit Options to Commit Configuration Changes (J-Web Procedure) for details about all commit options. |
The Ethernet OAM information is divided into two parts. To view general interface information such as the list of configured interfaces to monitor and the status, discovery state, and the peer address of each configured interface, select Troubleshoot > Ethernet OAM > View Link Fault Mgmt in the J-Web interface. To view interface-specific properties such as remote entity information and OAM statistics and events in the J-Web interface, select the interface name on the Ethernet OAM page.
Alternatively, enter the following CLI show commands:
- show oam ethernet link-fault-management brief
- show oam ethernet link-fault-management detail
- show oam ethernet link-fault-management interface-name
Table 76 summarizes the output fields in the Ethernet OAM displays.
Table 76: Summary of Ethernet OAM View Link Fault Mgmt Output Fields
Field | Values | Additional Information |
| Link Fault Management | ||
Interface | Interface for which information is displayed. | - |
Status | Indicates the status of the established link:
| - |
Discovery State | Mechanism to detect the presence of an OAM sublayer at the remote DTE. It consists of several states.
| In active mode, the interface discovers and monitors the peer on the link if the peer also supports IEEE 802.3ah OAM functionality. In passive mode, the peer initiates the discovery process. After the discovery process has been initiated, both sides participate in discovery. |
Peer Address | Address of the OAM peer. | - |
Flags | Information about the interface:
| - |
| Remote Entity Information | ||
Remote MUX Action | Indicates the state of the multiplexer functions of the OAM sublayer on the remote peer. | Device is forwarding non-OAM PDUs to the lower sublayer or discarding non-OAM PDUs. |
Unidirectional Mode | Indicates the ability to operate a link in a unidirectional mode for diagnostic purposes. | - |
Variable Requests | Indicates whether variable requests are supported. | The Variable Request OAM PDU, is used to request one or more MIB variables from the remote peer. |
Remote Parser Action | Indicates the state of the parser function of the OAM sublayer on the remote peer:
| - |
Remote Loopback Mode | Indicates whether remote loopback is supported or unsupported on the remote peer | - |
Discovery Mode | Indicates whether discovery mode is active or inactive. | - |
Link Events | Indicates whether interpreting link events is – supported or unsupported on the remote peer. | - |
| OAM Receive Statistics | ||
Information | The total number of information PDUs received. | - |
Loopback Control | The total number of loopback control PDUs received. | - |
Link Fault | The total number of link fault PDUs received. | - |
Event | The total number of event notification PDUs received. | - |
Organization Specific | The total number of vendor organization specific PDUs received. | - |
Variable Request | The total number of variable request PDUs received. | - |
Critical Event | The total number of critical event notification PDUs received. | - |
Variable Response | The total number of variable response PDUs received. | - |
Dying Gasp | The total number of dying gasp event PDUs received. | - |
| OAM Transmit Statistics | ||
Information | The total number of information PDUs transmitted. | - |
Loopback Control | The total number of loopback control PDUs transmitted. | - |
Event | The total number of event notification PDUs transmitted. | - |
Organization Specific | The total number of vendor organization specific PDUs transmitted. | - |
Variable Request | The total number of variable request PDUs transmitted. | - |
Variable Response | The total number of variable response PDUs transmitted. | - |
| OAM Received Symbol Error | ||
Events | The number of symbol error event TLVs that have been received since the OAM sublayer was reset. | - |
Window | The symbol error event window in the received PDU. | The protocol default value is the number of symbols that can be received in one second on the underlying physical layer. |
Threshold | The number of errored symbols in the period required for the event to be generated. | - |
Errors in Period | The number of symbol errors in the period reported in the received event PDU. | - |
Total Errors | The number of errored symbols that have been reported in received event TLVs since the OAM sublayer was reset. | These are coding symbol errors. |
| OAM Received Frame Error | ||
Events | The number of errored frame event TLVs that have been received since the OAM sublayer was reset. | - |
Window | The duration of the window in terms of the number of 100 ms period intervals. | - |
Threshold | The number of detected errored frames required for the event to be generated. | - |
Errors in Period | The number of detected errored frames in the period. | - |
Total Errors | The number of errored frames that have been reported in received event TLVs since the OAM sublayer was reset. | A frame error is any frame error on the underlying physical layer. |
| OAM Received Frame Period Error | ||
Events | The number of frame period errors event TLVs that have been received since the OAM sublayer was reset. | - |
Window | The duration of the frame period window. | - |
Threshold | The number of frame period errors required for the event to be generated. | - |
Errors in Period | The number of frame period errors in the period. | - |
Total Errors | The number of frame period errors that have been reported in received event TLVs since the OAM sublayer was reset | A frame period error is a configured number of frame errors within a default number of frames. The default value is the number of minimum size frames that can be received in one second on the underlying physical layer. |
| OAM Received Frame Seconds Error | ||
Events | The number of frame seconds errors event TLVs that have been received since the OAM sublayer was reset. | - |
Window | The duration of the frame seconds window. | - |
Threshold | The number of frame seconds errors required for the event to be generated. | - |
Errors in Period | The number of frame seconds errors in the period. | - |
Total Errors | The number of frame seconds errors that have been reported in received event TLVs since the OAM sublayer was reset. | A frame seconds error is a one-second interval with at least one frame error. |
| OAM Transmitted Symbol Error | ||
Events | The number of symbol error event TLVs that have been transmitted since the OAM sublayer was reset. | - |
Window | The symbol error event window in the transmitted PDU. | - |
Threshold | The number of errored symbols in the period required for the event to be generated. | - |
Errors in Period | The number of symbol errors in the period – reported in the transmitted event PDU. | - |
Total Errors | The number of errored symbol period event TLVs that have been transmitted since the OAM sublayer was reset. | Symbol errors are coding symbol errors. |
| OAM Transmit Frame Error | ||
Events | The number of errored frame event TLVs that have been transmitted since the OAM sublayer was reset. | - |
Window | The duration of the window in terms of the number of 100 ms period intervals. | - |
Threshold | The number of detected errored frames required for the event to be generated. | - |
Errors in Period | The number of detected errored frames in the period. | - |
Total Errors | The number of errored frames that have been detected since the OAM sublayer was reset. | - |