20.2.3 Jumbo Frames

Jumbo frames are a function for relaying frames whose DA to data in MAC headers exceeds 1518 octets. In addition to using jumbo frames, you can also increase the fragment size of IP packets by using the ip mtu configuration command to change the MTU value.

The Switch supports only frames in Ethernet V2 format. IEEE802.3 format frames are not supported. For information on Tagged frames, see Formatting Tagged Frames in 24.1.5 VLAN Tag. The following table describes the jumbo frame support status.

Table 20-15: Jumbo frame support functionality

Item	Frame format		Description
	Ethernet V2	IEEE 802.3
Frame size (octets)	1519~9234	NG	DA to length of MAC headers. (FCS excluded).
Reception	OK	NG	Frames in IEEE 802.3 format are discarded when the value of the LENGTH field is 0x05DD (1501 octets) or larger.
Sending	OK	NG	Frames in IEEE 802.3 format are not sent.

Note that 10BASE-T/100BASE-TX/1000BASE-T supports only 100BASE-TX (full duplex) and 1000BASE-T (full duplex).