Auto-Cross (Mdix), Auto-Negotiation And Speed-Sensing - Eaton PXES4P Series Installation And User Manual

PXES4P Switches
Switching, Address Learning
The PXES4P Series units have address table capacity of 2K node addresses, and
are suitable for use in large networks. They are self-learning, so that as nodes are added or
changed, the PXES4P Series 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 when
connecting the PXES4P to other unmanaged switches, legacy hubs, managed switches,
media-converters 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
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