No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


OSN 500 550 580 V100R008C50 Alarms and Performance Events Reference 02

Rate and give feedback :
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).



The ETHOAM_RMT_LOOP is an alarm indicating the remote loopback of the point-to-point Ethernet OAM. This alarm is reported only at the port with the point-to-point OAM function enabled. If the port is able to respond to the loopback, it enters the loopback response state and reports the loopback response alarm after it receives the remote loopback enabling command from the OAM port at the opposite end. The loopback initiator reports the loopback initiating alarm. If the port receives the loopback disabling command, it exits the loopback response state and ends the loopback response alarm. The loopback initiator also ends the loopback initiating alarm.


Alarm Severity Alarm Type


Equipment alarm


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

  • 0x01: The loopback is initiated.
  • 0x02: The loopback is responded.

Impact on the System

The alarm is generated when the system runs the IEEE 802.3ah OAM protocol. When the alarm is reported, the services are loop backed from the loopback initiator to the loopback responder. The services and other packets are all interrupted.

Possible Causes

The possible causes of the ETHOAM_RMT_LOOP alarm are as follows:

  • A command is issued to enable the loopback at the local port, and the opposite end acts as the loopback responder.

  • A command is issued to enable the loopback at the opposite port, and the local end acts as the loopback responder.


  1. Disable the loopback function of the port. Then, the alarm is cleared automatically.

Related Information


Updated: 2019-01-21

Document ID: EDOC1100020975

Views: 75078

Downloads: 138

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next