Cisco SG 300- 28P - Dynamic MAC Addresses

Managing MAC Address Tables
Dynamic MAC Addresses
Cisco Small Business 300 Series Managed Switch Administration Guide 142
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To define a static address:
STEP 1 Click MAC Address Tables > Static Addresses. The Static Addresses Page opens.
The
Static Addresses Page displays the defined static addresses.
STEP 2 Click Add. The Add Static Address Page opens.
STEP 3 Enter the parameters.
• VLAN ID—Select the VLAN ID for the port.
• MAC Address—Enter the interface MAC address.
• Interface—Select an interface (port or LAG) for the entry.
• Status—Select how the entry is treated. The options are:
- Permanent—The static MAC address is never aged out of the table and
if it is saved to the Startup Configuration, it is retained after rebooting.
- Delete on reset—The static MAC address is never aged out of the table
- Delete on timeout—The MAC address is deleted when aging occurs.
- Secure—The MAC address is secure when the interface is in classic
locked mode.
STEP 4 Click Apply. A new entry is made in the table.
Dynamic MAC Addresses
The Dynamic Address Table contains the MAC addresses acquired by monitoring
the source addresses of traffic entering the switch. When the destination address
for inbound traffic is found in the database, the packets intended for that address
are forwarded directly to the associated port. Otherwise, the traffic is flooded to
all ports in the VLAN of the frame.
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 a certain period. This period of time is the aging
interval.