Reference Guide

%E90MH:5 %ACL_AGENT-2-ACL_AGENT_LIST_ERROR: Unable to apply access-list Mac-
Limit on GigabitEthernet 5/84
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 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
mac learning-limit Dynamic
The MAC address table is stored on the Layer 2 forwarding information base (FIB) region of the CAM.
The Layer 2 FIB region allocates space for static MAC address entries and dynamic MAC address entries.
When you enable MAC learning limit, entries created on this port are static by default. When you
configure the dynamic option, learned MAC addresses are stored in the dynamic region and are subject
to aging. Entries created before this option is set are not affected.
mac learning-limit mac-address-sticky
Using sticky MAC addresses allows you to associate a specific port with MAC addresses from trusted
devices. If you enable sticky MAC, the specified port retains any dynamically learned addresses and
prevents them from being transferred or learned on other ports.
If you configure mac-learning-limit and you enabled sticky MAC, all dynamically learned addresses
are converted to sticky MAC addresses for the selected port. Any new MAC addresses learned on this port
is converted to sticky MAC addresses.
To save all sticky MAC addresses into a configuration file that can be used as a startup configuration file,
use the write config command. If the number of existing MAC addresses is fewer than the configured
mac learn limit, any additional MAC addresses are converted to sticky MACs on that interface. To remove
all sticky MAC addresses from the running config file, disable sticky MAC and use the write config
command.
When you enable sticky mac on an interface, dynamically learned MAC addresses do not age, even if you
enabled mac-learning-limit dynamic. If you configured mac-learning-limit and mac-
learning-limit dynamic and you disabled sticky MAC, any dynamically learned MAC addresses ages.
mac learning-limit station-move
The station-move option, allows a MAC address already in the table to be learned off another interface.
For example, if you disconnect a network device from one interface and reconnect it to another
interface, the MAC address is learned on the new interface. When the system detects this “station move,”
the system clears the entry learned on the original interface and installs a new entry on the new interface.
Learning Limit Violation Actions
To configure the system to take an action when the MAC learning limit is reached on an interface and a
new address is received using one the following options with the
mac learning-limit command, use
the following commands.
Layer 2
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