Mac-Address Mac-Learning Enable - HP 6125XLG Command Reference Manual

You can delete all the MAC address entries (including unicast MAC address entries and static multicast
MAC address entries) of a specified VLAN, or you can delete only a specific type (dynamic, static, or
blackhole) of MAC address entries. You can single out certain interfaces and delete the corresponding
unicast MAC address entries, but not the corresponding static multicast MAC address entries.
The MAC address entries configuration cannot survive a reboot unless you save it. The dynamic MAC
address entries, however, are lost upon reboot regardless of whether you save the configuration.
Examples
# Add a static entry for MAC address 000f-e201-0101. All frames that are destined for this MAC address
are sent out of interface Ten-GigabitEthernet 1/0/1, which belongs to VLAN 2.
<Sysname> system-view
[Sysname] mac-address static 000f-e201-0101 interface ten-gigabitethernet 1/0/1 vlan 2
Related commands
display mac-address
•
• mac-address (interface view)

mac-address mac-learning enable

Use mac-address mac-learning enable to enable MAC address learning. Depending on the view that
you entered, you can enable it globally, on an interface, or on a VLAN.
Use undo mac-address mac-learning enable to disable MAC address learning. Depending on the view
that you entered, you can disable it globally, on an interface, or on a VLAN.
Syntax
mac-address mac-learning enable
undo mac-address mac-learning enable
Default
MAC address learning is enabled.
Views
System view, VLAN view, Ethernet interface view, aggregate interface view, S-channel interface view
Predefined user roles
network-admin
Usage guidelines
To prevent the MAC address table from becoming saturated, you can disable MAC address learning.
For example, a number of packets with different source MAC addresses reaching a device can affect the
MAC address table update. You can disable MAC address learning to avoid such attacks, but the
following guidelines apply:
You can disable MAC address learning on a per-interface basis. If you disable MAC address
•
learning globally, MAC address learning is disabled for all interfaces, and the device stops
learning MAC addresses and cannot dynamically update the MAC address table.
Because disabling MAC address learning can result in broadcast storms, enable broadcast storm
•
suppression after you disable MAC address learning on an interface. For more information about
broadcast storm suppression, see Layer 2—LAN Switching Configuration Guide.
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