configure jumbo-frame-size

configure jumbo-frame-size framesize


Sets the maximum jumbo frame size for the switch.

Syntax Description

framesize Specifies a maximum transmission unit (MTU) size for a jumbo frame. The range is 1523 to 9216; the default is 9216.


Jumbo frames are disabled by default. The default size setting is 9216.

Usage Guidelines

Jumbo frames are used between endstations that support larger frame sizes for more efficient transfers of bulk data. Both endstations involved in the transfer must be capable of supporting jumbo frames.

The framesize keyword describes the maximum jumbo frame size “on the wire,” and includes 4 bytes of cyclic redundancy check (CRC) plus another 4 bytes if 802.1Q tagging is being used.

To enable jumbo frame support, you must configure the maximum transmission unit (MTU) size of a jumbo frame that will be allowed by the switch.



Extreme Networks recommends that you set the MTU size so that fragmentation does not occur.

Some network interface cards (NICs) have a configured maximum MTU size that does not include the additional 4 bytes of CRC. Ensure that the NIC maximum MTU size is at or below the maximum MTU size configured on the switch. Frames that are larger than the MTU size configured on the switch are dropped at the ingress port.


The following command configures the jumbo frame size to 5500:

configure jumbo-frame-size 5500


This command was first available in ExtremeXOS 10.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.