Mac-Address Mac-Learning Enable - HP FlexNetwork 5130 HI series Command Reference Manual

# Add a multiport unicast MAC address entry for MAC address 000f-e201-0101. Then, all frames that
are destined for this MAC address are sent out of GigabitEthernet 1/0/1 through GigabitEthernet
1/0/3, which belong to VLAN 2.
<Sysname> system-view
[Sysname] mac-address multiport 000f-e201-0101 interface gigabitethernet 1/0/1 to
gigabitethernet 1/0/3 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 globally, on an interface,
or on a VLAN.
Use undo mac-address mac-learning enable to disable MAC address learning 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
Layer 2 Ethernet interface/Layer 2 aggregate interface view
VLAN 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. To avoid such attacks, you can disable MAC address learning by
following these guidelines:
•
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. The device then 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.
•
With MAC address learning enabled globally, you can disable MAC address learning for an
interface or VLAN.
When MAC address learning is disabled, the device immediately deletes the existing dynamic MAC
address entries.
Examples
# Disable MAC address learning globally.
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