MAC flapping detected

yjhd · Created Nov 6, 2018 07:19:34

There is also a situation that is opposite to the above
The source MAC first enters CE6865 from eth2, and then encapsulates it into the Vxlan tunnel, and Unpack it to CE128. After Unpack, CE128 confirms that the packet is learned from 10.5.2.10, and then sends it from eth2.

Torrent · Created Nov 6, 2018 07:34:36

so if customer meet this issue how to resolved it?
do you have any good idea to solve this issue asap.

thanks for sharing us a good example

Skay · Created Nov 6, 2018 07:38:42

hi author , from you sharing case , i think there is no any root cause shared to us , usually mac-address flapping , there is a physical or logical loop exist customer's network . so i think we can suggest to customer check the flapping mac-address source interface one by one , located the flapping mac-address place and check the loop .

GongXiaochuan · Created Nov 6, 2018 07:45:59

There is no relation between MAC flapping and patch installation. MAC flapping should be caused by shutting port and un-shutting port

limgsc · Created Nov 6, 2018 09:43:58

your document is work for me , i get the point , fix my issue by your doc thanks you very much ,
also hope you public more doc that levle like this .
would you please also mention where from the technical detail , i can found it from orignial part .
from orignial part i can found more correct parameter , this is more important .

No.9527 · Created Nov 8, 2018 08:23:39

By default, the system performs flapping detection for all MAC addresses. In some scenarios, for example, in a scenario where the flapping of a MAC address is caused by a specific device or operation faults, flapping detection does not need to be implemented for the MAC address, so flapping detection is not needed for this MAC address.

To disable the system from implementing flapping detection for a MAC address, run the mac-address flapping detection exclude command to add the MAC address to the MAC flapping detection whitelist. After configuration, if flapping occurs on the specific MAC address, no MAC flapping alarm or record is generated for this MAC address.

lizhi94 · Created Nov 13, 2018 09:42:05

the MAC flapping detected is a abnormal problem ，it serious influence our network useful and The source MAC first enters CE6865 from eth2, and then encapsulates it into the Vxlan tunnel, and Unpack it to CE128. After Unpack, CE128 confirms that the packet is learned from 10.5.2.10, and then sends it from eth2.

Finn92 · Created Nov 16, 2018 02:26:24

This is how it has been repeated, leading to such problems, the reasons may be:

1. The user's traffic will enter from CE128 and will enter from CE6865.

hrllo author , but why ? and how to solve it then ? we are waiting your solution ,

littlestone · Created Nov 27, 2018 06:26:27

MAC address drift refers to the phenomenon that in the same VLAN, a MAC address has two out-bound interfaces, and the out-bound interface learnt later covers the original out-bound interface. This is the official definition. Generally speaking, MAC address drift refers to the change of the outlet interface of the MAC address table entry.

MAC flapping detected

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