User's Manual
20
4.4 Store-and-Forward
Store-and-Forward is one type of packet-forwarding techniques.
A Store-and Forward Industrial Gigabit Ethernet Switch stores the
incoming frame in an internal buffer, do the complete error checking
before transmission. Therefore, no error packets occur as it is the best
choice when a network needs efciency and stability.
The Industrial Gigabit 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 improve the overall performance. An
Ethernet Switching can be easily congured in any Ethernet network
environment to signicantly boost bandwidth using conventional cabling
and adapters.
Due to the learning function of the Industrial Gigabit 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 lter packets whose destination address is on the
same segment as the source address. This connes network trafc to
its respective domain, reducing the overall load on the network.
The Industrial Gigabit 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 Gigabit 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 within the second of both the devices
connected and capable of. Both 10Base-T and 100Base-TX devices can
connect with the port in either half- or full-duplex mode. 1000Base-T
can be only connected in full-duplex mode.