4 frame size commands, Jumbo frame – PLANET SGSD-1022 User Manual

Page 377

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User’s Manual of SGSD-1022 / SGSD-1022P

SGSW-2840 / SGSW-2840P

Main Power Status: Up

Loader Version: 1.0.0.2

Boot ROM Version: 0.0.1.1

Operation Code Version: 0.0.3.5

Console#

5.5.4 Frame Size Commands

This section describes commands used to configure the Ethernet frame size on the switch.

Command

Function

Mode

jumbo frame

Enables support for jumbo frames

GC

Table 5-10 Frame Size Commands

jumbo frame

This command enables support for jumbo frames. 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 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.

T

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.

Enabling jumbo frames will limit the maximum threshold for broadcast storm control to 64 packets per second. (See the

switchport broadcast command on page 4-178.)

The current setting for jumbo frames can be displayed with the show system command (page 4-30).

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