Got it
Huawei Enterprise Support Community
Community Forums Transmission Network
How to resolve ELAN_SMAC_...

How to resolve ELAN_SMAC_FLAPPING caused by network switch.

Created: Mar 21, 2021 14:13:04Latest reply: Mar 21, 2021 14:34:53 395 2 0 0 0
  HiCoins as reward： 0 (problem unresolved)
View the author 1#

Hi, 


Does anyone know how to solve the ELAN_SMAC_Flapping alarm in OSN580? 


I have an ELAN or VPLS service in NCE NMS and the split horizon group is already enabled. I always experience an ELAN_SMAC_Flapping Alarm.  Based on the statement from huawei support, this alarm is being caused by the configuration at the Network Switch. However, whether the STP protocol is enabled or not on the switch port connecting to OSN 580 EM10 port,. the alarm still persist. The network switch is using the VRRP protocol between Switch 1 and switch 2.  Does anyone here can help to advise on how to resolve this alarm?

OSN 5800

Like (0) Dislike (0) Favorite(0) Share Report
Previous: What is the difference between NCE and U2000?
Next: How do you Make Hardware and Software Loopback for OSN1800?
Featured Answers

Recommended answer

(0) (0)
Nino_Chou
Admin Created Mar 21, 2021 14:34:53

Hi friend!


ELAN_SMAC_FLAPPING is an alarm indicating the flapping of the source MAC address learned by an E-LAN service. This alarm is reported when two ports on an NE configured with an E-LAN service learn the same source MAC address.


Attribute


Alarm SeverityAlarm Type

Major

Service alarm


Parameters


When you view an alarm on the network management system, select the alarm. The Alarm Details field displays 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, please refer to the following table:


NameMeaning
Parameter 1 to Parameter 6Indicate the flapping source MAC address.
Parameter 7, Parameter 8Indicate the VLAN ID of the E-LAN service.
Parameter 9

Indicates the port type prior to the MAC address flapping.

  • 0x00: UNI port

  • 0x01: NNI port

Parameter 10 to Parameter 13

Indicate the port ID prior to the MAC address flapping, either a UNI ID or an NNI ID.

Parameter 14

Indicates the port type after the MAC address flapping.

  • 0x00: UNI port

  • 0x01: NNI port

Parameter 15 to Parameter 18

Indicate the port ID after the MAC address flapping, either a UNI ID or an NNI ID.


Impact on the system


A network storm occurs.


Possible causes


A possible cause of the alarm is as follows:


  • Cause 1: A UNI port or an NNI port on the NE is looped.

Procedure


Cause 1: A UNI port or an NNI port on the NE is looped.


a). Check for a loopback according to the VLAN ID of the E-LAN service. For details, see Detecting a loopback of an E-LAN service.


b) If a loopback exists, shut down the looped port. Check whether the alarm is cleared. If the alarm persists, contact our Huawei technical support engineers to handle the alarm.


Hope this helps. Thank you!

View more
  • x
  • convention：
All Answers
(0) (0)
2#
BetterMing
BetterMing Created Mar 21, 2021 14:13:44

Hello, dear.
It's nice to meet you in the community.
We're working on getting the right answer for you. Please rest assured that we'll be back with an answer shortly.
View more
  • x
  • convention：
(0) (0)
3#
Nino_Chou
Nino_Chou Admin Created Mar 21, 2021 14:34:53

Hi friend!


ELAN_SMAC_FLAPPING is an alarm indicating the flapping of the source MAC address learned by an E-LAN service. This alarm is reported when two ports on an NE configured with an E-LAN service learn the same source MAC address.


Attribute


Alarm SeverityAlarm Type

Major

Service alarm


Parameters


When you view an alarm on the network management system, select the alarm. The Alarm Details field displays 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, please refer to the following table:


NameMeaning
Parameter 1 to Parameter 6Indicate the flapping source MAC address.
Parameter 7, Parameter 8Indicate the VLAN ID of the E-LAN service.
Parameter 9

Indicates the port type prior to the MAC address flapping.

  • 0x00: UNI port

  • 0x01: NNI port

Parameter 10 to Parameter 13

Indicate the port ID prior to the MAC address flapping, either a UNI ID or an NNI ID.

Parameter 14

Indicates the port type after the MAC address flapping.

  • 0x00: UNI port

  • 0x01: NNI port

Parameter 15 to Parameter 18

Indicate the port ID after the MAC address flapping, either a UNI ID or an NNI ID.


Impact on the system


A network storm occurs.


Possible causes


A possible cause of the alarm is as follows:


  • Cause 1: A UNI port or an NNI port on the NE is looped.

Procedure


Cause 1: A UNI port or an NNI port on the NE is looped.


a). Check for a loopback according to the VLAN ID of the E-LAN service. For details, see Detecting a loopback of an E-LAN service.


b) If a loopback exists, shut down the looped port. Check whether the alarm is cleared. If the alarm persists, contact our Huawei technical support engineers to handle the alarm.


Hope this helps. Thank you!

View more
  • x
  • convention：
Back to list

Comment

Advanced
B Color Image Link Quote Code Smilies
You need to log in to comment to the post Login | Register
Comment

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " User Agreement."

My Followers

Login and enjoy all the member benefits

Login
Huawei Website Support About Huawei Privacy User Agreement Terms of Use Cookies Cookie Settings
Huawei Enterprise Huawei Carrier Forum Training & Certification

Contact Us: e_online@huawei.com Copyright © 2022 Huawei Technologies Co., Ltd. All rights reserved.

APP

Block
Are you sure to block this user?
Users on your blacklist cannot comment on your post,cannot mention you, cannot send you private messages.
Reminder
Please bind your phone number to obtain invitation bonus.