Switching And Address Learning; Auto-Negotiation And Speed Sensing - Moxa Technologies EtherDevice Hardware Installation Manual

Switching and Address Learning

Moxa EtherDevice Server has an address table that can hold up to
4K node addresses, which makes it suitable for use with large
networks. The address tables are self-learning, so that as nodes
are added or removed, or moved from one segment to another,
Moxa EtherDevice Server automatically keeps up with new node
locations.
An address-aging algorithm causes the least-used addresses to be
deleted in favor of newer, more frequently used addresses. To
reset the address buffer, power down the unit and then power it
back up.

Auto-Negotiation and Speed Sensing

All of Moxa EtherDevice Server's RJ45 Ethernet ports
independently support auto-negotiation for speeds in the 10BaseT
and 100BaseTX modes, with operation according to the IEEE
802.3u standard. This means that some nodes could be operating
at 10 Mbps, while at the same time, other nodes are operating at
100 Mbps.
Auto-negotiation takes place when an RJ45 cable connection is
made, and then each time a LINK is enabled. Moxa EtherDevice
Server advertises its capability for using either 10 Mbps or
100 Mbps transmission speeds, with the device at the other end of
the cable expected to similarly advertise. Depending on what type
of device is connected, this will result in agreement to operate at a
speed of either 10 Mbps or 100 Mbps.
If a Moxa EtherDevice Server RJ45 Ethernet port is connected to a
non-negotiating device, it will default to 10 Mbps speed and
half-duplex mode, as required by the IEEE 802.3u standard.
MOXA EtherDevice Server Hardware Installation Guide
Hardware Overview
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