5-20
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 5 Administering the Switch
Managing the MAC Address Table
Beginning in privileged EXEC mode, follow these steps to suppress alarms on the second power supply.
This procedure is optional.
Enter the power-supply dual global configuration command to return to the default setting where alarms
are sent if two power supplies are not supplying power. You can enter the show env power privileged
EXEC command to see if the alarm is disabled for the second power supply.
See the command reference for this release for more information on the commands.
Managing the MAC Address Table
The MAC address table contains address information that the switch uses to forward traffic between
ports. All MAC addresses in the address table are associated with one or more ports. The address table
includes these types of addresses:
• Dynamic address: a source MAC address that the switch learns and then ages when it is not in use.
• Static address: a manually entered unicast address that does not age and that is not lost when the
switch resets.
The address table lists the destination MAC address, the associated VLAN ID, and port number
associated with the address and the type (static or dynamic).
Note For complete syntax and usage information for the commands used in this section, see the command
reference for this release.
These sections contain this configuration information:
• Building the Address Table, page 5-21
• MAC Addresses and VLANs, page 5-21
• Default MAC Address Table Configuration, page 5-22
• Changing the Address Aging Time, page 5-22
• Removing Dynamic Address Entries, page 5-23
• Configuring MAC Address Notification Traps, page 5-23
• Adding and Removing Static Address Entries, page 5-25
• Configuring Unicast MAC Address Filtering, page 5-26
• Disabling MAC Address Learning on a VLAN, page 5-27
• Displaying Address Table Entries, page 5-28
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no power-supply dual Suppress alarms if a second power supply is not providing power.
Step 3
end Return to privileged EXEC mode.
Step 4
show env {all | power} Verify your setting.
Step 5
copy running-config startup-config (Optional) Save your entries in the configuration file.
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