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MOXA EtherDevice Switch Hardware Installation Guide
4-6
Dual Speed Functionality and Switching
MOXA EDS-508’s 10/100 Mbps RJ45 switched ports can be configured
for 10 Mbps operation, 100 Mbps operation, or to auto-negotiate with the
connected device for the fastest data transmission rate supported by both
devices.
All models of MOXA EDS-508 are plug-and-play devices, so that software
configuration is not required at installation, or during maintenance. The
half/full duplex mode for the switched RJ45 ports is user dependent and
changes (by auto-negotiation) to full or half duplex, depending on which
transmission speed is supported by the attached device.
Switching, Filtering, and Forwarding
Each time a packet arrives at one of the switched ports, a decision is made
to either filter or forward the packet. Packets with source and destination
addresses belonging to the same port segment will be filtered,
constraining those packets to one port, and relieving the rest of the
network from the need to process them. A packet with destination address
on another port segment will be forwarded to the appropriate port, and
will not be sent to the other ports where it is not needed. Packets that are
used in maintaining the operation of the network (such as the occasional
multi-cast packet) are forwarded to all ports.
MOXA EDS-508 operates in the store-and-forward switching mode,
which eliminates bad packets and enables peak performance to be
achieved when there is heavy traffic on the network.