Ge EtherNAV D7600 Series User Manual download pdf (Page 9)

Manageable 8/9-Port Switch

BASIC FUNCTIONS

In general, the D7600 is responsible for switching both VLAN tagged and untagged frames

from a receiving port to one or more transmitting ports. The switch performs multiple steps

during the switching process:

VLAN CLASSIFICATION

LEARNING

FILTERING

AGING

Below is additional information about tasks that the switch performs during unicast

and multicast switching.

User’s Manual 5

PLEASE NOTE:

I. Half-duplex mode uses back pressure flow control to prevent the receiving

buffer from being overrun by data from a source node.

II. Full-duplex mode uses 802.3x flow control standard to prevent fast data traffic

from overrunning slow data traffic.

III. Auto-sensing mode is in use after auto-negotiating with the other end of the link.

UNICAST SWITCHING

VLAN CLASSIFICATION

When the switch receives a frame, it classifies the frame in one of two ways:

- If the frame is untagged, the switch classifies the frame to an

associated VLAN.

- If the frame is tagged, the switch uses the tagged VLAN ID to identify the

broadcasting domain of the frame.

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Ge EtherNAV D7600 Series User Manual Page 9