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OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
VP_RDI

VP_RDI

Description

The VP_RDI is a remote defect indication for a virtual path. When a forward or backward VP connection that is set with the segment and end point attribute receives the RDI cells, the VP_RDI alarm is reported indicating that the downstream services are abnormal.

Attribute

Alarm Severity Alarm Type

Major

Communication alarm

Parameters

Name Meaning

Parameter 1

This parameter is used for the TDM-domain ATM board. The fixed value is 0x01 and the value is meaningless.

This parameter is used for packet-domain ATM boards and E1 interface boards, and indicates connection direction.

  • 0x01: forward
  • 0x02: backward

Parameter 2, Parameter 3

These parameters are used for the TDM-domain ATM board and indicate the connection ID and connection direction.

The value is the remainder of applying the algorithm ((ConnId - 1)×2 + ConnDir)/2048 to connection ID (Connld) and connection direction (ConnDir).

NOTE:
  • ConnDir: the value 1 means forward and the value 2 means backward.
  • ConnId: the value 1 means an odd number and the value 2 means an even number.

Parameter 2 is used for packet-domain ATM boards and E1 interface boards, and indicates segment/end attribute of the alarm.

  • 0x01: segment
  • 0x02: end

Parameter 4

This parameter is used for the TDM-domain ATM board and indicates the group number.

The value is the integer result of applying the algorithm ((ConnId - 1)×2 + ConnDir)/2048 to connection ID (Connld) and connection direction (ConnDir).

NOTE:

The unidirectional connections of the alarm are divided on the 2048 base.

Parameter 5

This parameter is used for the TDM-domain ATM board and indicates the source ATM port number of a certain connection in a certain direction.

  • For the ATM board with the IMA function, the value of this parameter ranges from 0x01 to 0x4A (1 to 74). The values 0x01 to 0x04 (1 to 4) represent external optical port numbers; the values 0x05 to 0x4A (5 to 74) represent internal VCTRUNK numbers.
  • For the ATM board without the IMA function, the value of this parameter ranges from 0x01 to 0x14. The values 0x01 to 0x04 (1 to 4) represent external optical port numbers; the values 0x05 to 0x14 (5 to 20) represent internal VCTRUNK numbers.
NOTE:

Internal VCTRUNK numbers are calculated by applying the algorithm (VCTRUNK ID - 0x8001 + 0x0005) to actual VCTRUNK IDs.

Impact on the System

When the VP_RDI alarm is reported, services are not affected. This alarm only indicates that the services in the receive direction of the downstream VP connection are abnormal. The AIS cells are received in a segment point of the connection and the RDI cells are returned to the upstream VC connection.

Possible Causes

Possible causes of the VP_RDI alarm are as follows:

  • The VP_AIS alarm is reported in the receive direction of the downstream connection.
  • The ATM processing chip on the alarmed board is faulty.

Procedure

  1. View the VP_RDI alarm information on the U2000 and confirm the connection where the alarm is generated according to alarm parameters 2 and 3.
  2. Check whether the VP_AIS alarm is reported in the receive direction of the downstream connection. If yes, clear it and check whether the VP_RDI alarm is cleared.
  3. If the VP_RDI alarm persists, the ATM processing chip on the board may be faulty. Reset (cold) the board and check whether the VP_RDI alarm is cleared.

    If services on a board are not configured with protection, the services are interrupted after the board cold reset.

  4. If the VP_RDI alarm persists, replace the board that generates the alarm.

Related Information

Unidirectional connection

A complete bidirectional connection is divided into a forward unidirectional connection and a backward unidirectional connection. The direction of the forward and backward connections is based on the same node.

End and segment

The end point refers to the termination point in the chain network, and it is used to monitor the whole virtual connection. The segment point is, generally, used to monitor a segment of the whole link.

Segment and end point

This is one of the segment end attributes. The segment end attributes include: segment point, end point, segment and end point, non-segment and end point.

  • If an NE is set with the segment end point attribute, it can retrieve the alarms that are generated at the segment and end.
  • If an NE is set with the segment point attribute, it can retrieve the alarms that are generated at a segment.
  • If an NE is set with the end point attribute, it can retrieve the alarms that are generated at an end.
  • If an NE is set with the non-segment end point attribute, it fails to retrieve the alarms that are generated at the segment and end.
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Updated: 2019-01-21

Document ID: EDOC1100020975

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