Quick Installation Guide

the PC hardware, other devices on the PCI bus, and the applications being run. Considering all the variables involved, it is recommended to experiment with the Packet Propulsion threshold to find the setting that maximizes the performance of the Cheetah Gigabit Adapter in your system.

Jumbo Frame Support

The Cheetah Gigabit Adapter can be configured to use Jumbo Frames. This increases the maximum Ethernet frame size from 1514 bytes up to 9014 bytes. Using Jumbo Frames greatly reduces the packet processing overhead and can boost throughput by up to 300% for bulk data transfers.

Note that to use Jumbo Frames, both communicating computers must have network cards that support this feature. Also at full duplex, all switches in the network between the two end computers must be able to accept the extended frame size. With half-duplex connections, all devices in the collision domain would need to support Jumbo Frames. LAN partitioning, either physical or logical using VLAN tags, can be implemented to allow computers to simultaneously support standard and Jumbo frame sizes.

VLAN Properties

Select the “VLAN Properties” tab in the utility window to configure the adapter’s VLAN options and to edit the 16-entry VLAN ID table.

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Accton Technology EN1407-SX manual Vlan Properties, Jumbo Frame Support