22.2.3 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.

For information on Tagged frames, see Formatting Tagged Frames in 26.1.5 VLAN Tag. The following table describes the jumbo frame support status.

Table 22-13: 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	If LENGTH field is equal to or greater than 0x05DD(1501 octet, it is treated as Ethernet V2.0 frame type.
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).