Black Box LP004A manual Switching, Filtering and Forwarding

BLACK BOX→ Power Over Ethernet Switch(PoE) Installation and User Guide

LP004A Series units are plug-and-play devices. There is no software configuring to be done at installation or for maintenance. The internal function is described below.

Switching, Filtering and Forwarding

Each time a packet arrives on one of the switched ports, the decision is taken to either filter or to forward the packet. Packets whose source and destination addresses on the same port segment will be filtered, constraining them to one port and relieving the rest of the network from processing them. A packet whose destination address is on another port segment will be forwarded to the appropriate port, and will not be sent to the other ports where it is not needed. Packets needed for maintaining the operation of the network (such as occasional multi-cast packets) are forwarded to all ports. The LP004A Series Power Over Ethernet (PoE) Switch operate in the store-and-forward switching mode, which eliminates bad packets and enables peak performance to be achieved when there is heavy traffic on the network.

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