4 store-and-forward, 5 auto-negotiation – PLANET GSD-805 User Manual
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3.4 Store-and-Forward
Store-and-Forward is one type of packet-forwarding techniques. A Store-and
Forward Gigabit Ethernet Switch stores the incoming frame in an internal buffer,
do the complete error checking before transmission. Therefore, no error packets
occurrence, it is the best choice when a network needs efficiency and stability.
The 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 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 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 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 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.
3.5 Auto-Negotiation
The STP ports on the 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 detect the modes and speeds at the second of both device is 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.