MAC Address Tables
Configuring the Aging Time for Dynamic Addresses
Cisco Small Business SG200 Series 8-port Smart Switches Administration Guide
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Configuring the Aging Time for Dynamic Addresses
The
Dynamic Address Settings
page enables you to set an aging time, after which
the system removes addresses in the dynamic MAC address table that have not
been refreshed. The aging period applies to dynamically learned addresses and
to static addresses that are configured to Delete on Timeout. The default aging
time is 300 seconds.
To configure the aging time:
STEP 1
Click
MAC Address Tables
>
Dynamic Address Settings
in the navigation
window.
STEP 2
Specify an aging time from 10 to 1,000,000 seconds.
STEP 3
Click
Apply
. Your changes are saved to the Running Configuration.
Dynamic MAC Addresses
When the switch cannot find an entry in its bridging table that matches the VLAN
and the destination MAC address of an incoming packet, the switch learns the
MAC address, the VLAN, and the ingress port of the packet and adds an entry to
the Dynamic Address table.
To prevent the bridging table from overflowing and to make room for new
addresses, an address is deleted from the bridging table if no traffic is received
from a dynamic MAC address for the configured aging period (see
Configuring
the Aging Time for Dynamic Addresses
).
To display the
Dynamic Addresses
page, click
MAC Address Tables
>
Dynamic Addresses
in the navigation window.
NOTE
This page might take up to 45 seconds to display when the Dynamic Address Table
contains the maximum number of entries.
By default, the Dynamic Address Table displays all dynamically learned MAC
addresses. You can enter filter criteria and click
Go
to filter the display. Use the
VLAN ID
filter to display table entries for a particular VLAN. Use the
MAC Address
filter to display entries for a particular MAC address. Use the
Interface
filter to
display entries for a particular port or LAG. Click
Clear Filter
to display all of the
entries.
