Reference Guide

Layer 2 | 967
With the keyword no-station-move option, MAC addresses learned through this feature
on the selected interface will persist
on a per-VLAN basis, even if received on
another interface. Enabling or disabling this option has no effect on already learned
MAC addresses.
Once the MAC address learning limit is reached, the MAC addresses do not age out
unless you add the
dynamic option. To clear statistics on MAC address learning, use
the clear counters command with the learning-limit parameter.
When a channel member is added to a port-channel and there is not enough ACL
CAM space, then the MAC limit functionality on that port-channel is undefined.
When this occurs, un-configure the existing configuration first and then reapply the
limit with a lower value.
Related
Commands
mac learning-limit learn-limit-violation
c e s
z
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
Note: If you configure this command on an interface in a routed VLAN, and once the
MAC addresses learned reaches the limit set in the mac learning-limit command, IP
protocols are affected. For example, VRRP sets multiple VRRP Masters, and OSPF
may not come up.
clear counters Clear counters used in the
show interface command
clear mac-address-table 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 8.3.19.0 Introduced on S4820T.
Version 8.3.7.0 Introduced on S4810