White Papers

Table Of Contents
The range is from 10 to 1000000.
Configuring a Static MAC Address
A static entry is one that is not subject to aging. Enter static entries manually.
To create a static MAC address entry, use the following command.
Create a static MAC address entry in the MAC address table.
CONFIGURATION mode
mac-address-table static
Displaying the MAC Address Table
To display the MAC address table, use the following command.
Display the contents of the MAC address table.
EXEC Privilege mode
show mac-address-table [address | aging-time [vlan vlan-id]| count | dynamic | interface
| static | vlan]
address: displays the specified entry.
aging-time: displays the configured aging-time.
count: displays the number of dynamic and static entries for all VLANs, and the total number of entries.
dynamic: displays only dynamic entries.
interface: displays only entries for the specified interface.
static: displays only static entries.
vlan: displays only entries for the specified VLAN.
MAC Learning Limit
MAC address learning limit is a method of port security on Layer 2 port-channel and physical interfaces, and VLANs. It allows
you to set an upper limit on the number of MAC addresses that learned on an interface/VLAN. After the limit is reached, the
system drops all traffic from a device with an unlearned MAC address.
This section describes the following:
Setting the MAC Learning Limit
mac learning-limit Dynamic
mac learning-limit mac-address-sticky
mac learning-limit station-move
Learning Limit Violation Actions
Setting Station Move Violation Actions
Recovering from Learning Limit and Station Move Violations
Dell EMC Networking OS Behavior: When configuring the MAC learning limit on a port or VLAN, the configuration is
accepted (becomes part of running-config and show mac learning-limit interface) before the system verifies
that sufficient CAM space exists. If the CAM check fails, a message is displayed:
%E90MH:5 %ACL_AGENT-2-ACL_AGENT_LIST_ERROR: Unable to apply access-list Mac-Limit on
TenGigabitEthernet 1/24/1
In this case, the configuration is still present in the running-config and show output. Remove the configuration before
re-applying a MAC learning limit with a lower value. Also, ensure that you can view the Syslog messages on your session.
NOTE:
The CAM-check failure message beginning in Dell EMC Networking OS version 8.3.1.0 is different from versions
8.2.1.1 and earlier, which read:
% Error: ACL returned error
% Error: Remove existing limit configuration if it was configured before
486 Layer 2