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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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ETHOAM_DISCOVER_FAIL

ETHOAM_DISCOVER_FAIL

Description

The ETHOAM_DISCOVER_FAIL is an alarm indicating the point-to-point Ethernet OAM discovery failure. When the OAM function is enabled at the port of a board and the negotiation with the equipment at the opposite end fails, the alarm is reported.

Attribute

Alarm Severity Alarm Type

Minor

Equipment alarm

Parameters

When you view an alarm on the network management system, select the alarm. In the Alarm Details field display the related parameters of the alarm. The alarm parameters are in the following format: Alarm Parameters (hex): parameter1 parameter2...parameterN. For details about each parameter, refer to the following table.

Name Meaning

Parameter 1

Indicates the port number.

Parameter 2, Parameter 3

Parameter 2 is always 0x00, and Parameter 3 is always 0x01. These parameters are meaningless.

Parameter 4

Indicates the failure reason.

  • 0x01: The local end is incorrectly connected.
  • 0x02: The local end fails to transmit OAM packets.
  • 0x03: The OAM packets from the opposite end are not received.
  • 0x04: The OAM configuration of the opposite end does not meet the requirements of the local end.
  • 0x05: The OAM configuration of the local end does not meet the requirements of the opposite end.
  • 0x06-0xff: Other unknown reasons.

Impact on the System

The alarm is generated when the system runs the IEEE 802.3ah OAM protocol. IEEE 802.3ah OAM is a link management protocol and is irrelevant to services. The ETH-OAM function is disabled.

Possible Causes

The possible causes of the ETHOAM_DISCOVER_FAIL alarm are as follows:

  • A link fault occurs at the local end.

  • The local end fails to transmit the OAM packets.

  • The local end fails to receive the OAM packets within the specified time.

  • The OAM configuration of the opposite end does not meet the requirements of the local end.

  • The OAM configuration of the local end does not meet the requirements of the opposite end.

Procedure

  1. View the alarm on the NMS and determine the possible causes of the alarm according to Parameter 4.
  2. When the value of Parameter is 0x01, a link fault occurs at the local end. Query board level alarms on the NMS. Then, rectify the fault according to the specific link alarms such as the ETH_LOS and LINK_ERR.
  3. When the value of Parameter is 0x02, the local end fails to transmit the OAM packets. View the printed information about the serial port. The DSSP, drive, and microcode components are involved in the problem. The fault needs to be located under the assistance of the relevant engineers.
  4. When the value of the parameter is 0x03, the local end fails to receive the OAM packets from the opposite end within the time specified by the user.
    1. Check whether the MAC addresses of the interconnected ports are the same. If the MAC addresses are different, check whether the alarm is cleared.
    2. Check whether the IEEE 802.3ah protocol is enabled at the opposite end. If the protocol is enabled, check whether the alarm is cleared.
    3. If the alarm persists, the local end fails to receive the packets. Replace the board.
  5. When the value of the parameter is 0x04, the OAM configuration of the opposite end, including link event reporting capability and unidirectional operation capability, does not meet the requirements of the local end. Query and modify the configuration of the opposite port on the NMS. When the configuration meets the requirements of the local end, the alarm is cleared automatically.
  6. When the value of the parameter is 0x05, the OAM configuration of the local end does not meet the requirements of the opposite end. Query and modify the configuration of the local port on the NMS. When the configuration meets the requirements of the opposite end, the alarm is cleared automatically.

Related Information

None.

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Updated: 2019-01-21

Document ID: EDOC1100020975

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