The mac-address flapping detection vlan security-level command configures the security level of VLANs for MAC address flapping detection.
The undo mac-address flapping detection vlan security-level command restores the default security of VLANs for MAC address flapping detection.
By default, the security level of a VLAN for MAC address flapping detection is middle. At this security level, the system considers that a MAC address flapping occurs when a MAC address moves between interfaces 10 times.
mac-address flapping detection vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all } security-level { high | middle | low }
undo mac-address flapping detection vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all } security-level [ high | middle | low ]
Parameter |
Description |
Value |
|---|---|---|
vlan-id1 [ to vlan-id2 ] |
Specifies the VLANs of which the security level needs to be set for MAC address flapping detection.
The value of vlan-id2 must be larger than the value of vlan-id1. You can specify a maximum of 10 VLAN ID ranges in a command. |
|
| all | Configures security level of all VLANs for MAC address flapping detection. |
- |
| high | Sets the security level of specified VLANs to high. At this security level, the system considers that a MAC address flapping occurs when a MAC address moves between interfaces three times. |
- |
| middle | Sets the security level of specified VLANs to middle. At this security level, the system considers that a MAC address flapping occurs when a MAC address moves between interfaces 10 times. |
- |
| low | Sets the security level of specified VLANs to low. At this security level, the system considers that a MAC address flapping occurs when a MAC address moves between interfaces 50 times. |
- |
Usage Scenario
By default, the switch considers that a MAC address flapping occurs when a MAC address moves between interfaces 10 times. On an unstable network, it may be a normal situation when a MAC address moves between interfaces 10 times. You can set the security level for VLANs according to the actual situation of your network. The switch reports a MAC address flapping when a MAC address moves between interfaces for the specified number of times.