Specifications

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System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 4 Administering the Switch
Managing the MAC Address Table
• If you disable MAC address learning on a VLAN that includes a secure port, MAC address learning
is not disabled on that port. If you disable port security, the configured MAC address learning state
is enabled.
DETAILED STEPS
To reenable MAC address learning on a VLAN, use the default mac address-table learning vlan
vlan-id global configuration command. You can also reenable MAC address learning on a VLAN by
entering the mac address-table learning vlan vlan-id global configuration command. The first
(default) command returns to a default condition and therefore does not appear in the output from the
show running-config command. The second command causes the configuration to appear in the show
running-config privileged EXEC command display.
EXAMPLE
This example shows how to disable MAC address learning on VLAN 200:
Switch(config)# no mac address-table learning vlan 200
You can display the MAC address learning status of all VLANs or a specified VLAN by entering the
show mac-address-table learning [vlan vlan-id] privileged EXEC command.
Displaying Address Table Entries
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no mac address-table learning
vlan vlan-id
Disable MAC address learning on the specified VLAN or
VLANs. You can specify a single VLAN ID or a range of VLAN
IDs separated by a hyphen or comma. Valid VLAN IDs 1 to 4094.
It cannot be an internal VLAN.
Step 3
end Return to privileged EXEC mode.
Step 4
show mac address-table learning
[vlan vlan-id]
Verify the configuration.
Step 5
copy running-config
startup-config
(Optional) Save your entries in the configuration file.
Command Description
show ip igmp snooping groups Displays the Layer 2 multicast entries for all VLANs or the
specified VLAN.
show mac address-table
address
Displays MAC address table information for the specified MAC
address.
show mac address-table
aging-time
Displays the aging time in all VLANs or the specified VLAN.
show mac address-table count Displays the number of addresses present in all VLANs or the
specified VLAN.