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CHAPTER 7: MAC ADDRESS TABLES
FIGURE 7-2. MAC ADDRESS TABLE CONFIGURATION SCREEN #2
PARAMETER DESCRIPTION
Aging Configuration: By default, dynamic entries are removed from the MAC table after 300 seconds. This removal is also called
aging. Configure aging time by entering a value here in seconds; for example, Age time seconds. The allowed range is 10 to 1000000
seconds. Disable the automatic aging of dynamic entries by checking the checkbox. Disable automatic aging.
MAC Table Learning: If the learning mode for a given port is greyed out, another module is in control of the mode, so that it cannot be
changed by the user. An example of such a module is the MAC-Based Authentication under 802.1X. Each port can do learning based
upon the following settings:
Auto: Learning is done automatically as soon as a frame with unknown SMAC is received.
Disable: No learning is done.
Secure: Only static MAC entries are learned, all other frames are dropped.
NOTE: Make sure that the link used for managing the switch is added to the Static Mac Table before changing to secure learning
mode, otherwise the management link is lost and can only be restored by using another non-secure port or by connecting to the
switch via the serial interface.
VLAN Learning Configuration:
Learning-disabled VLANS: This field shows the Learning-disabled VLANs. When a NEW MAC arrives into a learning-disabled VLAN,
the MAC won’t be learned. By the default, the field is empty. More VLANs may be created by using a list syntax where the individual
elements are separated by commas. Ranges are specified with a dash separating the lower and upper bound. The following example
will create VLANs 1, 10, 11, 12, 13, 200, and 300: 1,10-13,200,300. Spaces are allowed in between the delimiters.
Static MAC Table Configuration
The static entries in the MAC table are shown in this table. The static MAC table can contain 128 entries. The maximum of 128 entries
is for the whole stack, and not per switch.
VLAN ID: The VLAN ID of the entry.
MAC Address: The MAC address of the entry.
Port Members: Checkmarks indicate which ports are members of the entry. Check or uncheck as needed to modify the entry.
