Allied Telesis AT-FS238b/2 - Manual (Page 27)

AT-FS238a/x and AT-FS238b/x Series Installation Guide
17
Bridging Converter Performance
The bridging converters perform at:
❑
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 2,000 MAC addresses
❑
280 KB (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, such as port speed, duplex mode, and Auto-Negotiation.
For the fiber optic port, you can set the duplex mode to 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 will automatically set the port’s speed and duplex mode.
MAC Address Table
Up to 2,000 MAC addresses can be stored in the bridging converter’s MAC
address table. The bridging converter’s self-learning feature will learn all new
addresses in real-time after power-up. If the source address of an incoming
packet is not found in the MAC address table, the bridging converter will
update the table with the new address.
The bridging converter also has an automatic address aging feature that will
delete a source address from the table if it has not seen 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becoming filled with addresses of end-nodes that are no longer active.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 bridging converter forwards all multicast, broadcast, and unlearned
unicast packets when the MAC address table has exceeded its storage limit.