1-7
To do… Use the command… Remarks
Set the maximum number of
MAC addresses the port can
learn
mac-address
max-mac-count count
Required
By default, the number of the
MAC addresses a port can learn
is not limited.
Specifying the maximum number of MAC addresses a port can learn disables centralized MAC address
authentication and port security on the port. On the other hand, if you enable centralized MAC address
authentication and port security on a port, you cannot specify the maximum number of MAC addresses
the port can learn.
Disabling MAC Address learning for a VLAN
You can disable a switch from learning MAC addresses in specific VLANs to improve stability and
security for the users belong to these VLANs and prevent unauthorized accesses.
Follow these steps to disable MAC address learning for a VLAN:
To do… Use the command… Remarks
Enter system view system-view —
Enter VLAN view vlan vlan-id —
Disable the switch from learning
MAC addresses in the VLAN mac-address
max-mac-count 0
Required
By default, the device learns
MAC addresses in every VLAN.
z If the VLAN is configured as a remote probe VLAN used by port mirroring, you can not disable MAC
address learning of this VLAN. Similarly, after you disable MAC address learning, this VLAN can
not be configured as a remote probe VLAN.
z Disabling the MAC address learning function of a VLAN takes no effect on enabling the centralized
MAC address authentication on the ports that belong to the VLAN.