Service Manual

Usage Information
This command and its options are supported on physical interfaces, static LAGs, LACP LAGs, and VLANs.
If you do not specify the vlan option, the MAC address counters are not VLAN-based. That is, the sum of the
addresses learned on all VLANs (not having any learning limit configuration) is counted against the MAC learning
limit.
MAC Learning Limit violation logs and actions are not available on a per-VLAN basis.
With the keyword no-station-move option, MAC addresses learned through this feature on the selected
interface 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.
After 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, 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
clear counters — Clear counters used in the show interface command.
clear mac-address-table dynamic — clears the MAC address table of all MAC address learned dynamically.
show mac learning-limit — displays MAC learning-limit configuration.
mac learning-limit learn-limit-violation
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
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.
Defaults none
Command Modes INTERFACE (conf-if-interface-slot/port)
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information This command is supported on physical interfaces, static LAGs, and LACP LAGs.
Related Commands show mac learning-limit — displays details of the mac learning-limit.
776 Layer 2