Edge Products ES3528-WDM - Manual (Page 288)

System Management Commands
19-10
19
jumbo frame
This command enables support for extended frame sizes on Fast Ethernet and
Gigabit Ethernet ports. Use the no form to disable it.
Syntax
[no] jumbo frame
Default Setting
Disabled
Command Mode
Global Configuration
Command Usage
• This switch provides more efficient throughput for large sequential data
transfers by supporting jumbo frames on Gigabit Ethernet ports of up to 9216
bytes. Compared to standard Ethernet frames that run only up to 1.5 KB,
using jumbo frames for local Gigabit Ethernet connections significantly
reduces the per-packet overhead required to process protocol encapsulation
fields.
• Frame sizes for Fast Ethernet ports can be extended up to 1546 bytes, and
are used primarily to allow for additional header fields – not to significantly
increase the per-packet data size. These Fast Ethernet extended fames and
are more often called “baby jumbo frames.”
• 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.
• After setting the jumbo frame size with the system mtu or system mtu jumbo
command (page 19-11), remember to use the jumbo frame command to
implement the new setting by enabling jumbo frames.
• The current setting for jumbo frames can be displayed with the show system
command (page 19-6).
Example
Related Commands
show system mtu (19-11)
Console(config)#jumbo frame
Console(config)#