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MAC Flapping in Cisco Swi...

MAC Flapping in Cisco Switch

Created: Nov 1, 2020 11:58:04Latest reply: Nov 1, 2020 12:03:46 505 1 0 0 0
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Hello All,


Good day.


Can i ask for your help?

I have deployed a WLAN Controller (AC6508) and 6 units of Access Point (AirEngine 5760-10)


Now, i have broadcasted an SSID.

The issue is that when their wireless client device transfers from one AP to another, MAC Flapping occurs in their Cisco Switch.


It is my first time to encounter an issue like this since when i always deploy, we also offer Huawei Switch and i did not encounter the MAC Flapping issue.


Can someone help me? Attached herein is their topology


I am wondering if the "port-isolate enable" command in the Huawei switches is the reason why MAC flapping does not occur in Huawei Switches.


Thank you

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mac-address flappingaccess point

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Popeye_Wang
Admin Created Nov 1, 2020 12:03:46

Hello,
This is a normal phenomenon when wireless user roaming in the network.  On the Huawei switch, we can use the following command to reduce the alarms.

mac-address flapping detection security-level low

mac-address flapping aging-time

There should be similar functions on the Cisco switch.


And the "port-isolate enable" command is used to implement Layer 2 isolation between interfaces. After port isolation is configured, ports are isolated at Layer 2 but can communicate at Layer 3 by default. This function does not prevent MAC address flapping.

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Popeye_Wang
Popeye_Wang Admin Created Nov 1, 2020 12:03:46

Hello,
This is a normal phenomenon when wireless user roaming in the network.  On the Huawei switch, we can use the following command to reduce the alarms.

mac-address flapping detection security-level low

mac-address flapping aging-time

There should be similar functions on the Cisco switch.


And the "port-isolate enable" command is used to implement Layer 2 isolation between interfaces. After port isolation is configured, ports are isolated at Layer 2 but can communicate at Layer 3 by default. This function does not prevent MAC address flapping.

View more
  • x
  • convention：
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