C
HAPTER
24
| System Management Commands
File Management
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COMMAND USAGE
â—† This switch provides more efficient throughput for large sequential data
transfers by supporting jumbo frames on Gigabit Ethernet ports up to
9216 bytes. Compared to standard Ethernet frames that run only up to
1.5 KB, using jumbo frames significantly reduces the per-packet
overhead required to process protocol encapsulation fields.
â—† To use jumbo frames, both the source and destination end nodes (such
as a computer or server) must support this feature. Also, when the
connection is operating at full duplex, all switches in the network
between the two end nodes must be able to accept the extended frame
size. And for half-duplex connections, all devices in the collision domain
would need to support jumbo frames.
â—† The current setting for jumbo frames can be displayed with the show
system command.
EXAMPLE
Console(config)#jumbo frame
Console(config)#
FILE MANAGEMENT
Managing Firmware
Firmware can be uploaded and downloaded to or from an FTP/TFTP server.
By saving runtime code to a file on an FTP/TFTP server, that file can later
be downloaded to the switch to restore operation. The switch can also be
set to use new firmware without overwriting the previous version.
When downloading runtime code, the destination file name can be specified
to replace the current image, or the file can be first downloaded using a
different name from the current runtime code file, and then the new file set
as the startup file.
Saving or Restoring Configuration Settings
Configuration settings can be uploaded and downloaded to and from an
FTP/TFTP server. The configuration file can be later downloaded to restore
switch settings.
The configuration file can be downloaded under a new file name and then
set as the startup file, or the current startup configuration file can be
specified as the destination file to directly replace it. Note that the file
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