C
HAPTER
22
| System Management Commands
Frame Size
– 721 –
COMMAND MODE
Privileged Exec
EXAMPLE
Console#watchdog
Console#
FRAME SIZE
This section describes commands used to configure the Ethernet frame size
on the switch.
jumbo frame This command enables support for layer 2 jumbo frames for Gigabit and
10 Gigabit Ethernet ports. Use the no form to disable it.
SYNTAX
[no] jumbo frame
DEFAULT SETTING
Disabled
COMMAND MODE
Global Configuration
COMMAND USAGE
u 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 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.
u 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.
u The current setting for jumbo frames can be displayed with the show
system command.
Table 53: Frame Size Commands
Command Function Mode
jumbo frame Enables support for jumbo frames GC
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