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Step 6
Click Save Changes.
Configuring the Aging Time for the MAC Address Table
Aging Time for the MAC Address Table
To efficiently switch packets between ports, the fabric interconnect maintains a MAC address table. It
dynamically builds the MAC address table by using the MAC source address from the packets received and
the associated port on which the packets were learned. The fabric interconnect uses an aging mechanism,
defined by a configurable aging timer, to determine how long an entry remains in the MAC address table. If
an address remains inactive for a specified number of seconds, it is removed from the MAC address table.
You can configure the amount of time (age) that a MAC address entry (MAC address and associated port)
remains in the MAC address table.
Configuring the Aging Time for the MAC Address Table
Procedure
Step 1
In the Navigation pane, click the Equipment tab.
Step 2
On the Equipment tab, click the Equipment node.
Step 3
In the Work pane, click the Policies tab.
Step 4
Click the Global Policies subtab.
Step 5
In the MAC Address Table Aging area, complete the following fields:
DescriptionName
The length of time an idle MAC address remains in the MAC address
table before it is removed by Cisco UCS. This can be one of the
following:
• Never—MAC addresses are never removed from the table
regardless of how long they have been idle.
• Mode Default—The system uses the default value. If the fabric
interconnect is set to end-host mode, the default is 14,500 seconds.
If it is set to switching mode, the default is 300 seconds.
• other—Cisco UCS Manager GUI displays the dd:hh:mm:ss field
which allows you to enter a custom value.
Aging Time field
The length of time a MAC address must remain idle before Cisco UCS
removes it from the MAC address table. This field is only visible if you
choose other for the aging time.
Enter a time in the format days:hours:minutes:seconds.
dd:hh:mm:ss field
Cisco UCS Manager GUI Configuration Guide, Release 2.0
OL-25712-04 245
Configuring the Aging Time for the MAC Address Table