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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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DLAG_PROTECT_FAIL

DLAG_PROTECT_FAIL

Description

The DLAG_PROTECT_FAIL is an alarm indicating that the DLAG protection fails. If negotiation fails or any anomaly occurs during the DLAG protection, the DLAG_PROTECT_FAIL alarm is reported.

Attribute

Alarm Severity Alarm Type

Major

Processing 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, Parameter 2

Indicate the ID of the LAG for which the protection fails. Parameter 2 is the higher byte, and Parameter 3 is the lower byte.

Parameter 3

Indicates the cause of the DLAG protection failure.

  • 0x01: Both the working and protection links fail.
  • 0x02: The active and standby ports fail to receive the LACP packets.
  • 0x03: The equipment at the opposite end does not enter the LACP synchronization status.
  • 0x04: The active or standby port detects the self-loop. Alternatively, the active or standby port may form a loop with other ports on the board.
  • 0x05: The communication between the active and standby boards times out.
  • 0x06: The communication between the board and cross-connect board times out.
  • 0x07: The active port selected by LACP is inconsistent with the one selected by cross-connect board.

Impact on the System

When all the protocols at the DLAG port fails, or when the board fails to normally communicate with other boards, the DLAG_PROTECT_FAIL alarm is reported. In the case of the DLAG_PROTECT_FAIL alarm, services cannot be received or transmitted in the LAG, or the user cannot check whether services are normally working.

Possible Causes

The possible causes of the DLAG_PROTECT_FAIL alarm are as follows:

  • Both the active and standby links fail.
  • The active and standby ports fail to receive the LACP packets.
  • The equipment at the opposite end does not enter the LACP synchronization status.
  • The active or standby port detects the self-loop. Alternatively, the active or standby port may form a loop with other ports on the board.
  • The communication between the active and standby boards times out.
  • The communication between the board and the cross-connect board or SCC board times out.
  • The active port selected by LACP is inconsistent with the one selected by cross-connect board.

Procedure

  1. View the DLAG_PROTECT_FAIL alarm on the U2000, and confirm the board where the DLAG_PROTECT_FAIL alarm is generated. Confirm the ID of the LAG where the DLAG_PROTECT_FAIL alarm is generated according to Parameter 1 and Parameter 2, and confirm the cause of the DLAG_PROTECT_FAIL alarm at the port according to Parameter 3.
  2. If the value of Parameter 3 is 0x01, it indicates that the link becomes faulty or fails.
    1. On the U2000, check whether the port in the LAG is enabled. If not enabled, enable the port and then check whether the DLAG_PROTECT_FAIL alarm is cleared.
    2. If the DLAG_PROTECT_FAIL alarm persists, check the link state of all the ports. Rectify the fault of the port link, then check whether the DLAG_PROTECT_FAIL alarm is cleared.
  3. If the value of Parameter 3 is 0x02, it indicates that the port fails to receive the LACP packets.
    1. On the U2000, check whether the LAG is configured at the opposite end, and check whether the port connected to the faulty port is added to the LAG at the opposite end. Make sure the LAG is correctly configured, and then check whether the DLAG_PROTECT_FAIL alarm is cleared.
    2. If the DLAG_PROTECT_FAIL alarm persists, check whether the local port transmits packets. If both ends can normally transmit and receive packets, check whether the DLAG_PROTECT_FAIL alarm is cleared.
  4. If the value of Parameter 3 is 0x03, it indicates that the opposite equipment fails to enter the LACP protocol synchronization status. Check the connection of the port, and LAG configuration at the opposite equipment, and then check whether the DLAG_PROTECT_FAIL alarm is cleared.
  5. If the value of Parameter 3 is 0x04, it indicates the port is in the self-loop status. Release the loop and then check whether the DLAG_PROTECT_FAIL alarm is cleared.
  6. If the value of Parameter 3 is 0x05, it indicates that the communication between the active and standby boards times out. Make sure the active and standby boards are in position, and the communication between them is normal. Then check whether the DLAG_PROTECT_FAIL alarm is cleared.
  7. If the value of Parameter 3 is 0x06, it indicates that the communication between the board and the cross-connect board, or SCC board, times out. Make sure the software of the cross-connect board and the SCC is normal. If the board normally communicates with the cross-connect board or SCC board, check whether the DLAG_PROTECT_FAIL alarm is cleared.
  8. If the value of Parameter 3 is 0x07, it indicates that the active port selected by LACP is inconsistent with the one selected by cross-connect board. Make sure the active port selected by LACP is consistent with the one selected by cross-connect board, and then check whether the DLAG_PROTECT_FAIL alarm is cleared.

Related Information

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Updated: 2019-01-21

Document ID: EDOC1100020975

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