LevelOne FNS-5000B, User Manual, Page: 40 / 108

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Jumbo Frame Setting (MTU)
"Jumbo frames" refer to Ethernet frames that are larger than 1500 bytes. It is designed to
enhance Ethernet networking throughput and reduce the CPU utilization of large file transfers
by enabling more efficient larger payloads per packet.
Maximum Transmission Unit (MTU) refers to the size (in bytes) of the largest packet that a
given layer of a communications protocol can transmit.
FNS-5000B uses standard Ethernet frames: 1500 bytes by default. If your network
appliances support jumbo frame setting, select the appropriate MTU value for your network
environment. FNS-5000B supports 4074 and 9000 bytes for MTU.
Note: Jumbo frame setting is valid in Gigabit network environment only.
Besides, all network appliances connected must enable jumbo frame and use the
same MTU value.