CLI Reference Guide-R04

Chapter 4 | System Management Commands
File Management
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frame-size - the size in bytes (Range: 1500-9216)
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
◆ This switch provides more efficient throughput for large sequential data
transfers by supporting Layer 2 jumbo frames on Gigabit and 10 Gigabit
Ethernet ports or trunks of up to 10240 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.
◆ 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.
◆ This command globally enables support for jumbo frames on all Gigabit and 10
Gigabit ports and trunks. To set the MTU for a specific interface, enable jumbo
frames and use the switchport mtu command to specify the required size of the
MTU.
◆ The current setting for jumbo frames can be displayed with the show system
command.
Example
Console(config)#jumbo frame
Console(config)#
Related Commands
show system (119)
show ipv6 mtu (918)
File Management
Managing Firmware
Firmware can be uploaded and downloaded to or from an FTP/TFTP server or
through the USB port. 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.