Managing The Mac Address Table - 3Com Switch 7700 Configuration Manual

Managing the MAC
Address Table
Downloading Files with TFTP
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Configuring the File Transmission Mode
TFTP transmits files in two modes; binary mode for program files and ASCII mode
for text files. Use the following commands to configure the file transmission
mode.
Perform the following configuration in system view.
Table 12 Configuring the File Transmission Mode
Operation
Configure the file transmission mode
By default, TFTP transmits files in binary mode.
Downloading Files with TFTP
To download a file, the client sends a request to the TFTP server and receives data
from it, then sends acknowledgement to it. Use the following commands to
download files with TFTP.
Perform the following configuration in system view.
Table 13 Downloading Files with TFTP
Operation
Download files with TFTP
Uploading Files with TFTP
To upload a file, the client sends a request to the TFTP server and transmits data to
it, then receives the acknowledgement from it. Use the following commands to
upload files.
Perform the following configuration in system view.
Table 14 Uploading Files with TFTP
Operation
Upload files with TFTP
The Switch 7700 maintains a MAC address table for fast forwarding of packets. A
table entry includes the MAC address of a device and the port ID of the switch
connected to it. The switch learns dynamic entries when it receives a data frame
from a port (assumed as port A). The switch analyzes the source MAC address and
considers that the packets destined for the source MAC address can be forwarded
through port A. If the MAC address table contains the MAC_SOURCE, the switch
updates the corresponding entry, otherwise, it adds 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. The network device responds after receiving a broadcast
packet and the response contains the MAC address of the device, which the
switch learns and adds in the MAC address table. After this, subsequent packets

Managing the MAC Address Table

Command
tftp { ascii | binary }
Command
tftp tftp-server get source-file [ dest-file ]
Command
tftp tftp-server put source-file [ dest-file ]
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