Disabling Mac Address Learning On Vlan - Cisco Catalyst 9400 System Management Configuration Manual

Administering the Device
Step 7
Step 8
Step 9

Disabling MAC Address Learning on VLAN

You can control MAC address learning on a VLAN to manage the available MAC address table space by
controlling which VLANs can learn MAC addresses. Before you disable MAC address learning, be sure that
you are familiar with the network topology. Disabling MAC address learning on VLAN could cause flooding
in the network.
Beginning in privileged EXEC mode, follow these steps to disable MAC address learning on a VLAN:
Before you begin
Follow these guidelines when disabling MAC address learning on a VLAN:
• Use caution before disabling MAC address learning on a VLAN with a configured switch virtual interface
• You can disable MAC address learning on a single VLAN ID from 2 - 4093 (for example, no mac
Command or Action
Example:
Device(config)# mac address-table
notification threshold interval 123
Device(config)# mac address-table
notification threshold limit 78
end
Example:
Device(config)# end
show running-config
Example:
Device# show running-config
copy running-config startup-config
Example:
Device# copy running-config
startup-config
(SVI). The switch then floods all IP packets in the Layer 2 domain.
address-table learning vlan 223) or a range of VLAN IDs, separated by a hyphen or comma (for example,
no mac address-table learning vlan 1-10, 15).
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
Disabling MAC Address Learning on VLAN
Purpose
• (Optional) limit percentage Specifies the
percentage of the MAC address table use;
valid values are from 1 to 100 percent. The
default is 50 percent.
• (Optional) interval time Specifies the
time between notifications; valid values
are greater than or equal to 120 seconds.
The default is 120 seconds.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the
configuration file.
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