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Description
8
Store and Forward
The AT-FS20x switches support store and forward switching at Fast Ethernet
full-wire speed in 100 Mbps, half- or full-duplex mode. Packets entering each
port are stored in buffers. Once the packet is received, the switch forwards or
discards the packet, depending on its destination address and error status.
This ensures that only error-free packets destined for another segment are
transferred across the switch, reducing the network load. For example, if the
packet entering from Port 1 is destined for an end-node on Port 2, the switch
forwards the frame as long as the frame does not contain any errors. If the
packet from Port 1 is destined for an end-node also connected to Port 1, the
packet is discarded.
The switch discards CRC errors, misaligned, runt, and under or oversized
packets. When the packet has dribble bits at the end, the switch truncates to
the octet boundary and checks for a good CRC before forwarding.
External AC/DC Power Adapter
The power adapter supplies 12V DC to the switch. Allied Telesyn supplies an
approved safety compliant AC power adapter for the 100 and 240V AC
versions with an unregulated output of 12V DC.
Network Topologies
This section provides an illustration of a typical network topology with an
AT-FS202 Series switch.