Administrator Guide
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Layer 2
Layer 2 features are supported on the MXL switch platform.
Manage the MAC Address Table
The Dell Networking OS provides the following management activities for the MAC address table.
• Clearing the MAC Address Table
• Setting the Aging Time for Dynamic Entries
• Conguring a Static MAC Address
• Displaying the MAC Address Table
Clearing the MAC Address Table
You may clear the MAC address table of dynamic entries.
To clear a MAC address table, use the following command.
• Clear a MAC address table of dynamic entries.
EXEC Privilege mode
clear mac-address-table dynamic {address | all | interface | vlan}
– address: deletes the specied entry.
– all: deletes all dynamic entries.
– interface: deletes all entries for the specied interface.
– vlan: deletes all entries for the specied VLAN.
Setting the Aging Time for Dynamic Entries
Learned MAC addresses are entered in the table as dynamic entries, which means that they are subject to aging.
For any dynamic entry, if no packet arrives on the switch with the MAC address as the source or destination address within the
timer period, the address is removed from the table. The default aging time is 1800 seconds.
To disable a MAC address and specify an aging time, use the following commands.
• Disable MAC address aging for all dynamic entries.
CONFIGURATION mode
mac-address-table aging-time 0
• Specify an aging time.
CONFIGURATION mode
mac-address-table aging-time seconds
The range is from 10 to 1000000.
Dell Networking OS Behavior: The time elapsed before the congured MAC aging time expires is not precisely as congured. For
example, the VLAN conguration mac-address-table aging-time 1, does not remove dynamic entries from the CAM after
precisely 1 second. The actual minimum aging time for entries is approximately 5 seconds because this is the default MAC address
table scanning interval. Therefore, MAC aging congurations of less than 5 seconds, as in this example, might be ineective.
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Layer 2