3Com SuperStack 4 Configuration Manual page 294

306 C 12: F S
HAPTER ILE
MAC Address Table
Management
M
YSTEM ANAGEMENT
[SW5500]
4 Configure IP address 1.1.1.1 for the VLAN interface, ensure the port connecting
the PC is also in this VALN (VLAN 1 in this example).
[SW5500]interface vlan 1
[SW5500-vlan-interface1]ip address 1.1.1.1 255.255.255.0
[SW5500-vlan-interface1]quit
5 Upload the
config.cfg
<SW5500> tftp 1.1.1.2 put config.cfg config.cfg
6 Download the
<SW5500> tftp 1.1.1.2 get switch.app switch.app
7 Use the
boot boot-loader
application at the next login and reboot the Switch.
<SW5500> boot boot-loader switch.app
<SW5500> reboot
A Switch maintains a MAC address table for fast forwarding packets. A table entry
includes the MAC address of a device and the port ID of the Switch connected to
it. The dynamic entries (not configured manually) are learned by the Switch. The
Switch learns a MAC address in the following way: after receiving a data frame
from a port (assumed as port A), the Switch analyzes its source MAC address
(assumed as MAC_SOURCE) and considers that the packets destined at
MAC_SOURCE can be forwarded via the port A. If the MAC address table contains
the MAC_SOURCE, the Switch will update the corresponding entry, otherwise, it
will add the new MAC address (and the corresponding forwarding port) as a new
entry to the table.
The system forwards the packets whose destination addresses can be found in the
MAC address table directly through the hardware and broadcasts those packets
whose addresses are not contained in the table. The network device will respond
after receiving a broadcast packet and the response contains the MAC address of
the device, which will then be learned and added into the MAC address table by
the Switch. The consequent packets destined for the same MAC address can be
forwarded directly thereafter.
to the TFTP server.
from the TFTP server.
switch.app
command to specify the downloaded program as the