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AT-FS20x Series Installation Guide
7
Switch Performance
The AT-FS20x switches have the following performance values:
❑ 148,800 pps for 100 Mbps and 14,880 pps for 10 Mbps for full wire
speed forwarding and filtering
❑ 200 Mbps maximum throughput in 100 Mbps, full-duplex mode
❑ 20 Mbps maximum throughput in 10 Mbps, full-duplex mode
❑ Storage for up to 4,000 MAC addresses
❑ 280 kilo bytes (per port) packet buffer
❑ Low latency 15.6 µs (64-byte packet, 100 Mbps full-duplex)
DIP Switches
The DIP switches are used to manually configure the operating characteristics
of the ports. These characteristics include the port speed, duplex mode, and
Auto-Negotiation.
On the 100Base-FX fiber optic port, you can manually set the duplex mode to
either half- or full-duplex.
On the 10Base-T/100Base-TX twisted-pair port, you can manually set the
speed of the port to either 10 Mbps or 100 Mbps, set the duplex mode to either
half- or full-duplex and enable or disable Auto-Negotiation. Enabling Auto-
Negotiation automatically sets the port’s speed and duplex mode.
MAC Address Table
Up to 4,000 MAC addresses can be stored in the switch’s MAC address table.
After power-up, the switch’s self-learning feature learns new addresses in
real-time. If the source address of an incoming packet is not found in the MAC
address table, the switch updates the table with the new address.
The switch also has an automatic address aging feature that deletes a source
address from the table if it has not received a frame from the end-node with
that address within five minutes. This prevents the table from becoming filled
with addresses of end-nodes that are no longer active.
The switch forwards all multicast, broadcast, and unicast packets when the
MAC address table has exceeded its storage limit.