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4.4 Auto-Negotiation
The 100Base-TX ports on the Switch have built-in
"Auto-Negotiation". This technology automatically sets the best
possible bandwidth when a connection is established with an-
other network device (usually at Power On or Reset). This is
done by detect the mode and speed at the second device is
capable of. The 100Base-TX devices can connect with the
100Base-TX port in either Half- or Full-Duplex mode.
If attached device is: 100Base-TX port will set to:
100Mbps, no auto-negotiation 100Mbps
(100Base-TX, Half-Duplex)
100Mbps, with auto-negotiation 200Mbps
(100Base-TX, Full-Duplex)
10Mbps, no auto-negotiation 10Mbps
(10Base-T, Half-Duplex)
10Mbps, with auto-negotiation 20Mbps
(10Base-T, Full-Duplex)
Table E: Speed & Duplex mode detected by the switch
4.5 MAC Address Table
This 6-byte ID is called the MAC (Media Access Control) Ad-
dress. Every Ethernet data packet includes both source and
destination addresses.
These Switch models can automatically learn and store up to 4K
MAC addresses. The MAC address table is volatile: it disap-
pears when the switch is powered off or reset.
Note: When the network needs reconfiguration, we
recommend turning off the power first. After all
nodes have been moved, power on the switch to
rebuild the internal MAC address table.