Specifications

154 ExtremeWare XOS 10.1 Command Reference Guide
Commands for Configuring Slots and Ports on a Switch
configure jumbo-frame size
configure jumbo-frame size <number>
Description
Sets the maximum jumbo frame size for the switch chassis.
Syntax Description
Default
The default 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 number 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.
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.
Example
The following command configures the maximum MTU size of a jumbo frame size to 5500:
configure jumbo-frame size 5500
number Specifies a maximum transmission unit (MTU) size for a jumbo frame.