Auto-Cross (Mdix), Auto-Negotiation And Speed-Sensing - GarrettCom Magnum ES42 Series Installation And User Manual

ES42 Series Edge Switches
nodes are added or removed or moved from one segment to another, the ES42- Series
switch automatically keeps up with node locations.
An address-aging algorithm causes least-used addresses to fall out in favor of
new frequently-used addresses. To reset the address buffer, cycle power down-and-up.

4.2 Auto-cross (MDIX), Auto-negotiation and Speed-sensing

The RJ-45 ports support auto-cross (MDI or MDIX) in the auto-negotiation
mode according to the IEEE 802.3u standard. No crossover cables are needed on RJ-45
port, when connecting the ES42 to other unmanaged switches, legacy hubs, managed
switches, media-converter etc. Please note that there can be conditions with managed
switches where the switch manager fixes the port settings via software, and the result of
the auto-negotiation is changed in the managed switch by the manager commands. In
such cases, the 10/100 speed or the F/H mode may be affected, but auto-cross in the
ES42 will still work. The auto-cross function cannot be disabled.
When an RJ-45 cable connection is made, and each time LINK is enabled,
auto-negotiation takes place (except for legacy products, which do not have auto-
negotiation and which go to the default state accordingly). The Magnum ES42 Switch
advertises its capability for 10 or 100 Mbps speed and F/H duplex mode, and the device
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