Planet ISW-511 Series, Руководство пользователя

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4.4 Store-and-Forward
Store-and-Forward is one type of packet-forwarding techniques. A
Store-and-Forward Industrial Switch stores the incoming frames
in an internal buffer and checks any error from the frames before
transmission. No error packets occurrence, it is the best choice when
a network needs efficiency and stability.
The Industrial Fast Ethernet Switch scans the destination address from
the packet-header, searches the routing table provided for the incoming
port and forwards the packet, only if required. The fast forwarding
makes the switch attractive for connecting servers directly to the
network, thereby increasing throughput and availability. However, the
switch is most commonly used to segment existing hubs, which nearly
always improves overall performance. An Ethernet Switching can be
easily configured in any Ethernet network environment to significantly
boost bandwidth using conventional cabling and adapters.
Due to the learning function of the Industrial Fast Ethernet Switch,
the source address and corresponding port number of each incoming
and outgoing packet are stored in a routing table. This information is
subsequently used to filter packets whose destination address is on the
same segment as the source address. This confines network traffic to
its respective domain, reducing the overall load on the network.
The Industrial Fast Ethernet Switch performs “Store-and-Forward"
therefore, no error packets occur. More reliably, it reduces the
re-transmission rate. No packet loss will occur.
4.5 Auto-negotiation
The STP ports on the Industrial Fast Ethernet Switch have built-in
“Auto-negotiation” . This technology automatically sets the best
possible bandwidth when a connection is established with another
network device (usually at Power On or Reset). This is done by
detecting the modes and speeds at the second of both devices that are
connected and capable of. Both 10BASE-T and 100BASE-TX devices can
connect with the port in either half- or full-duplex mode.