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Follow these guidelines when configuring MAC address learning:
You may need to disable MAC address learning to prevent the MAC address table from being
saturated. For example, when your device is being attacked by many packets with different source
MAC addresses, it affects the update of the MAC address table.
Because disabling MAC address learning may result in broadcast storms, enable broadcast storm
suppression after you disable MAC address learning on a port.
Related commands: display mac-address mac-learning.
When MAC address learning is disabled, the learned MAC addresses remain valid until they age out.
Syntax
mac-address mac-learning disable
undo mac-address mac-learning disable
View
System view, Layer 2 Ethernet interface view, VLAN view, port group view, Layer 2 aggregate interface
view
Default level
2: System level
Parameters
None
Examples
# Disable global MAC address learning.
<Sysname> system-view
[Sysname] mac-address mac-learning disable
# Disable MAC address learning on port GigabitEthernet 1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] mac-address mac-learning disable
# Disable MAC address learning on VLAN 10.
<Sysname> system-view
[Sysname] vlan 10
[Sysname-vlan10] mac-address mac-learning disable
# Disable MAC address learning on Bridge-Aggregation 1.
<Sysname> system-view
[Sysname] interface bridge-aggregation 1
[Sysname-Bridge-Aggregation1] mac-address mac-learning disable
mac-address max-mac-count
Description
Use the mac-address max-mac-count count command to configure the maximum number of MAC
addresses that can be learned on a port.
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