Reference Guide

874 | Layer 2
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When you enable sticky MAC-address learning (sticky), dynamically-learned MAC addresses of
trusted devices are added to the running configuration and “stick” to the port or VLAN on which they
are learned even if an interface goes down and comes back up. If you save sticky MAC addresses to the
start-up configuration file by entering the write config command, the addresses are deleted from the
running-configuration, do not have to be dynamically relearned, and do not change when the switch
reboots. Any sticky MAC addresses learned after the write config is performed are not saved after a
reboot.
Related
Commands
mac learning-limit learn-limit-violation
c e s
Configure an action for a MAC address learning-limit violation.
Syntax
mac learning-limit learn-limit-violation {log | shutdown}
To return to the default, use the no mac learning-limit learn-limit-violation {log | shutdown}
command.
Parameters
Defaults
No default behavior or values
Command Modes
INTERFACE (conf-if-interface-slot/port)
Command
History
Usage
Information
This is supported on physical interfaces, static LAGs, and LACP LAGs.
Related
Commands
clear counters
Clear counters used in the
show interface command
clear mac-address-table
dynamic
Clear the MAC address table of all MAC address learned dynamically.
show mac learning-limit Display MAC learning-limit configuration.
log Enter the keyword log to generate a syslog message on a learning-limit
violation.
shutdown
Enter the keyword shutdown to shut down the port on a learning-limit
violation.
Version 8.2.1.0 Introduced on S-Series
Version 7.8.1.0 Introduced on C-Series
Version 7.5.1.0 Introduced on E-Series
show mac learning-limit Display details of the mac learning-limit