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Microwave loop

Microwave loop

Created: Dec 11, 2020 13:52:49Latest reply: Dec 16, 2020 20:03:26 506 9 1 0 0
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What's RF LOOP ?

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wissal
MVE Created Dec 11, 2020 18:02:43

Hello,

LOOP_ALM

Description

The LOOP_ALM is an alarm indicating that a loop occurs.

Attribute

Alarm SeverityAlarm Type
MinorEquipment 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.

NameMeaning
Parameter 1

Indicates the type of loopback.

  • 0x00: optical/electrical port inloop

  • 0x01: optical/electrical port outloop

  • 0x02: path inloop

  • 0x03: path outloop

  • 0x04: loopback on the user side

  • 0x05: loopback on the multiplexing side

  • 0x06: SPI inloop

  • 0x07: SPI outloop

  • 0x08: ATM layer inloop

  • 0x09: ATM layer outloop

  • 0x0A: PHY layer inloop

  • 0x0B: PHY layer outloop

  • 0x0C: MAC layer inloop

  • 0x0D: MAC layer outloop

  • 0x0E: VC-4 timeslot inloop

  • 0x0F: VC-4 timeslot outloop

  • 0x10: VC-3 timeslot inloop

  • 0x11: VC-3 timeslot outloop

  • 0x12: VC-12 timeslot inloop

  • 0x13: VC-12 timeslot outloop

  • 0x14: IF outloop

  • 0x15: IF inloop

  • 0x16: RF inloop

  • 0xFF: any of the preceding loopback modes

Impact on the System

When the LOOP_ALM alarm occurs, the looped port or path cannot carry services.

Possible Causes

Cause 1: A loop is performed on the local NE.

Procedure

  1. Cause 1: A loop is performed on the local NE.

    1. Determine the type of loopback according to the alarm parameter.

    2. Find out the cause of the loopback, and set the loopback status of the alarmed port to Non-Loopback.


      For details, see Software Loopback.


Related Information

This table provides parameters and their meanings for LOOP_ALM alarms reported by ports 1 to 7 on an EMS6 board.
NameMeaning
Parameter 1Indicates the optical port ID. The parameter takes a fixed value of 0x01.
Parameter 2, Parameter 3Indicate the path ID (the value 1 indicates that the optical port is looped back).
Parameter 4

Indicates loopback types.

  • 0x00: inloops at optical/electrical ports

  • 0x01: outloops at optical/electrical ports

  • 0x02: inloops at paths

  • 0x03: outloops at paths

  • 0x04: loopbacks on the client side

  • 0x05: loopbacks on the combination wave side

  • 0x08: inloops at the ATM layer

  • 0x09: outloops at the ATM layer

  • 0x0A: inloops at the PHY layer

  • 0x0B: outloops at the PHY layer

  • 0x0C: inloops at the MAC layer

  • 0x0D: outloops at the MAC layer

  • 0x0E: inloops at VC-4 timeslots

  • 0x0F: outloops at VC-4 timeslots

  • 0x10: inloops at VC-3 timeslots

  • 0x11: outloops at VC-3 timeslots

  • 0x12: inloops at VC-12 timeslots

  • 0x13: outloops at VC-12 timeslots

  • 0x14: outloops at IF ports

  • 0x15: inloops at IF ports

  • 0x16: inloops at RF ports

  • 0xFF: any of the preceding loopback modes

This table provides parameters and their meanings for LOOP_ALM alarms reported by ports VC-3 channels on an EMS6 board.
NameMeaning
Parameter 1Indicates the optical port ID. The parameter takes a fixed value of 0x01.
Parameter 2, Parameter 3Indicates the VC-3 channel ID.


Detail

https://support.huawei.com/hedex/hdx.do?lib=EDOC110011342131180BCL&docid=EDOC1100113421&lang=en&v=02&tocLib=EDOC110011342131180BCL&tocV=02&id=&tocURL=resources%252Fnottoctopics%252Fen-us_alarmref_0120624475.html&p=t&fe=1&ui=3&keyword=rf%2Bloop


Thanks

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user_4034933
user_4034933 Created Dec 11, 2020 23:55:09 (0) (0)
Thanks for answering  

Recommended answer

(1) (0)
BetterMing
Created Dec 12, 2020 01:21:14

Hello, dear. An E-LAN loop may cause MAC address flapping and even a broadcast storm. If a broadcast storm occurs, a large amount of port bandwidth is occupied, interrupting services and resulting in protocol exceptions. Therefore, services must be carefully planned and deployed to avoid E-LAN loops. For more information, you can refer to the following links： https://support.huawei.com/hedex/hdx.do?docid=EDOC1100112974&id=EN-US_CONCEPT_0120617970&lang=en
View more
  • x
  • convention：

user_4034933
user_4034933 Created Dec 12, 2020 15:50:01 (0) (0)
Thanks for answering  
All Answers
(0) (0)
2#
little_fish
little_fish Admin Created Dec 11, 2020 14:33:37

hi, we are working on it now.

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  • convention：
(1) (0)
3#
BetterMing
BetterMing Created Dec 11, 2020 14:35:47

Hello, dear. Can you tell me what equipment you are asking for? What kind of loop do you want to ask?
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user_4034933
user_4034933 Created Dec 11, 2020 15:55:14 (0) (0)
Huawei RTN series, need to know different loops types  
(1) (0)
4#
little_fish
little_fish Admin Created Dec 11, 2020 14:48:29

Microwave loop-3623693-1
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  • x
  • convention：
(1) (0)
5#
wissal
wissal MVE Created Dec 11, 2020 18:02:43

Hello,

LOOP_ALM

Description

The LOOP_ALM is an alarm indicating that a loop occurs.

Attribute

Alarm SeverityAlarm Type
MinorEquipment 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.

NameMeaning
Parameter 1

Indicates the type of loopback.

  • 0x00: optical/electrical port inloop

  • 0x01: optical/electrical port outloop

  • 0x02: path inloop

  • 0x03: path outloop

  • 0x04: loopback on the user side

  • 0x05: loopback on the multiplexing side

  • 0x06: SPI inloop

  • 0x07: SPI outloop

  • 0x08: ATM layer inloop

  • 0x09: ATM layer outloop

  • 0x0A: PHY layer inloop

  • 0x0B: PHY layer outloop

  • 0x0C: MAC layer inloop

  • 0x0D: MAC layer outloop

  • 0x0E: VC-4 timeslot inloop

  • 0x0F: VC-4 timeslot outloop

  • 0x10: VC-3 timeslot inloop

  • 0x11: VC-3 timeslot outloop

  • 0x12: VC-12 timeslot inloop

  • 0x13: VC-12 timeslot outloop

  • 0x14: IF outloop

  • 0x15: IF inloop

  • 0x16: RF inloop

  • 0xFF: any of the preceding loopback modes

Impact on the System

When the LOOP_ALM alarm occurs, the looped port or path cannot carry services.

Possible Causes

Cause 1: A loop is performed on the local NE.

Procedure

  1. Cause 1: A loop is performed on the local NE.

    1. Determine the type of loopback according to the alarm parameter.

    2. Find out the cause of the loopback, and set the loopback status of the alarmed port to Non-Loopback.


      For details, see Software Loopback.


Related Information

This table provides parameters and their meanings for LOOP_ALM alarms reported by ports 1 to 7 on an EMS6 board.
NameMeaning
Parameter 1Indicates the optical port ID. The parameter takes a fixed value of 0x01.
Parameter 2, Parameter 3Indicate the path ID (the value 1 indicates that the optical port is looped back).
Parameter 4

Indicates loopback types.

  • 0x00: inloops at optical/electrical ports

  • 0x01: outloops at optical/electrical ports

  • 0x02: inloops at paths

  • 0x03: outloops at paths

  • 0x04: loopbacks on the client side

  • 0x05: loopbacks on the combination wave side

  • 0x08: inloops at the ATM layer

  • 0x09: outloops at the ATM layer

  • 0x0A: inloops at the PHY layer

  • 0x0B: outloops at the PHY layer

  • 0x0C: inloops at the MAC layer

  • 0x0D: outloops at the MAC layer

  • 0x0E: inloops at VC-4 timeslots

  • 0x0F: outloops at VC-4 timeslots

  • 0x10: inloops at VC-3 timeslots

  • 0x11: outloops at VC-3 timeslots

  • 0x12: inloops at VC-12 timeslots

  • 0x13: outloops at VC-12 timeslots

  • 0x14: outloops at IF ports

  • 0x15: inloops at IF ports

  • 0x16: inloops at RF ports

  • 0xFF: any of the preceding loopback modes

This table provides parameters and their meanings for LOOP_ALM alarms reported by ports VC-3 channels on an EMS6 board.
NameMeaning
Parameter 1Indicates the optical port ID. The parameter takes a fixed value of 0x01.
Parameter 2, Parameter 3Indicates the VC-3 channel ID.


Detail

https://support.huawei.com/hedex/hdx.do?lib=EDOC110011342131180BCL&docid=EDOC1100113421&lang=en&v=02&tocLib=EDOC110011342131180BCL&tocV=02&id=&tocURL=resources%252Fnottoctopics%252Fen-us_alarmref_0120624475.html&p=t&fe=1&ui=3&keyword=rf%2Bloop


Thanks

View more
  • x
  • convention：

user_4034933
user_4034933 Created Dec 11, 2020 23:55:09 (0) (0)
Thanks for answering  
(1) (0)
6#
BetterMing
BetterMing Created Dec 12, 2020 01:21:14

Hello, dear. An E-LAN loop may cause MAC address flapping and even a broadcast storm. If a broadcast storm occurs, a large amount of port bandwidth is occupied, interrupting services and resulting in protocol exceptions. Therefore, services must be carefully planned and deployed to avoid E-LAN loops. For more information, you can refer to the following links： https://support.huawei.com/hedex/hdx.do?docid=EDOC1100112974&id=EN-US_CONCEPT_0120617970&lang=en
View more
  • x
  • convention：

user_4034933
user_4034933 Created Dec 12, 2020 15:50:01 (0) (0)
Thanks for answering  
(0) (0)
7#
anneper
anneper Created Dec 16, 2020 20:03:26

Thanks for sharing
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  • x
  • convention：
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