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The 10/100/1000-T ports support the IEEE 802.3ab standard, which includes the "Auto MDI/MDI-X"
feature. In the default configuration, "Auto", the ports on the switch will automatically detect the type of
port on the connected device and operate as either an MDI or MDI-X port, whichever is appropriate. So for
any connection, a straight-through twisted-pair cable can be used. You no longer have to use crossover
cables, although crossover cables can also be used for any of the connections.
If you connect a 6300M switch twisted-pair port to another switch or hub, which typically have MDI-X ports,
the 6300M port automatically operates as an MDI port. If you connect it to an end node, such as a server or
PC, which typically have MDI ports, the 6300M switch port operates as an MDI-X port. In all cases, you can
use standard straight-through cables or crossover cables.
If you use a correctly-wired crossover cable, though, the switch will still be able to automatically detect the
MDI/MDI-X operation and link correctly to the connected device.
Other Wiring Rules:
All twisted-pair wires used for 10 Mbps, and 100 Mbps operation must be twisted through the entire
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length of the cable. The wiring sequence must conform to EIA/TIA 568-B (not USOC). See "Pin
Assignments" later in this appendix for a listing of the signals used on each pin.
For 1000Base-T connections, all four pairs of wires in the cable must be available for data transmission.
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For 10 Mbps connections to the ports, you can use Category 3, 4, or 5 unshielded twisted-pair cable, as
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supported by the IEEE 802.3 Type 10Base-T standard.
For 100 Mbps connections to the ports, use 100-ohm Category 5 UTP or STP cable only, as supported by
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the IEEE 802.3u Type 100Base-TX standard.
For 1000 Mbps and SmartRate connections, 100-ohm Category 5e or better cabling is recommended.
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Straight-through twisted-pair cable for 10 Mbps or 100 Mbps
network connections
Because of the Aruba Auto-MDIX operation of the 10/100 ports on the switch, for all network connections,
to PCs, servers or other end nodes, or to hubs or other switches, you can use straight-through cables.
If any of these ports are given a fixed configuration, for example 100 Mbps/Full Duplex, the ports operate
as MDI-X ports, and straight-through cables must be then used for connections to PC NICs and other MDI
ports.
Figure 1 Cable Diagram
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