Jumbo Frames Support; Auto-Mdi/Mdix Support; Vlan-Aware Mac-Based Switching; Back Pressure Support - Dell M6220 User Configuration Manual

Jumbo Frames Support

Jumbo frames enable transporting data in fewer frames to ensure less
overhead, lower processing time, and fewer interrupts.
For information about configuring the port MTU, see "Configuring Port
Characteristics" on page 463.

Auto-MDI/MDIX Support

Your switch supports auto-detection between crossed and straight-through
cables. Media-Dependent Interface (MDI) is the standard wiring for end
stations, and the standard wiring for hubs and switches is known as Media-
Dependent Interface with Crossover (MDIX).

VLAN-Aware MAC-based Switching

Packets arriving from an unknown source address are sent to the CPU and
added to the Hardware Table. Future packets addressed to or from this
address are more efficiently forwarded.

Back Pressure Support

On half-duplex links, a receiver may prevent buffer overflows by jamming the
link so that it is unavailable for additional traffic. On full-duplex links, a
receiver may send a PAUSE frame indicating that the transmitter should
cease transmission of frames for a specified period.
When flow control is enabled, the PowerConnect M6220, M6348, M8024,
and M8024-k switches will observe received PAUSE frames or jamming
signals, but will not issue them when congested.
67
Switch Features