Configuring the ECN330-switch
731553-KDU 137 365 Uen D 2006-06-16
Ethernet ports of up to 9216 bytes. Compared to standard Ethernet
frames that run only up to 1.5 KB, using jumbo frames significantly
reduces the per-packet overhead required to process protocol
encapsulation fields.
• To use jumbo frames, both the source and destination end nodes (such
as a computer or server) must support this feature. Also, when the
connection is operating at full duplex, all switches in the network
between the two end nodes must be able to accept the extended frame
size. And for half-duplex connections, all devices in the collision domain
would need to support jumbo frames.
Command Attributes
• System MTU (1500-1546) – Specifies the MTU size for Fast Ethernet
ports. (Range: 1500-1546 bytes)
• Jumbo (1500-9216) – Specifies the jumbo frame size (MTU) for Gigabit
Ethernet ports. (Range: 1500-9216 bytes)
Web – Click System, System MTU. Set the maximum frame size for Fast
Ethernet and Gigabit Ethernet ports, then click Apply.
Figure 11 System MTU
CLI – This example sets the MTU for Fast Ethernet ports to 1528 bytes
Console(config)#system mtu 1528
Console(config)#exit
Console#show system mtu
System MTU size is 1528 Bytes
System Jumbo MTU size is 1518 Bytes
Console#
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