Store And Forward - Allied Telesis AT-FS201 Installation Manual

Bridging media converters

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AT-FS20x Series Installation Guide

Store and Forward

The AT-FS201, AT-FS202, and AT-FS202SC/FS1 Bridging Media

Converters 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 full packet is received, the converter will

forward or discard the packet, depending on its destination address and

error status. This ensures that only error-free packets destined for

another segment will be transferred across the converter, reducing

network load. For example, if the packet entering from Port 1 is destined

for an end-node on Port 2, the converter forwards the frame if 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 converter will discard CRC errors, misaligned, runt, and under-

oversized packets. When the packet has dribble bits at the end, the

converter will truncate to octet boundary and check for a good FCS before

forwarding.

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At-fs202 At-fs202sc/fs1