Installation guide

Command Line Interface
4-34
4
ports. 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.
• 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.
• The current setting for jumbo frames can be displayed with the show system
command (page 4-31).
Example
File Management Commands
Managing Firmware
Firmware can be uploaded and downloaded to or from a TFTP server. By saving
runtime code to a file on a TFTP server, that file can later be downloaded to the
switch to restore operation.
Only one copy of the system software (i.e., the runtime firmware) can be stored in
the file directory. When downloading runtime code, the new firmware file will
therefore overwrite the existing file on this switch.
Saving or Restoring Configuration Settings
Configuration settings can be uploaded and downloaded to and from a 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 “Factory_Default_Config.cfg”
can be copied to the TFTP server, but cannot be used as the destination on the
switch.
Console(config)#jumbo frame
Console(config)#
Table 4-11 Flash/File Commands
Command Function Mode Page
copy Copies a code image or a switch configuration to or from flash
memory or a TFTP server
PE 4-35
delete Deletes a file or code image PE 4-37
dir Displays a list of files in flash memory PE 4-38
whichboot Displays the files booted PE 4-39
boot system Specifies the file or image used to start up the system GC 4-39