Allied Telesis AT-x230-10GP, Руководство по установке

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Chapter 2: Installation
70
Cabling the switch
Observe the following guidelines when connecting twisted pair and fiber
optic cables to the ports on the switch:

The connector on the cable should fit snugly into the port on the
switch. The tab on the connector should lock the connector into
place.

Because the twisted pair ports have auto-MDI/MDIX, you may use
straight-through twisted pair cable to connect any type of network
device to the switch.

If your network topology contains a loop where two or more
network devices can communicate with each other over more than
one network path, do not connect the network cables that form the
loop until after you activate a spanning tree protocol on the switch.
Data loops can adversely affect network performance.

If you are creating a port trunk, do not connect the cables of the
trunk to the switch until after you have created the trunk in the
switch’s management software. Otherwise, a network loop will
result which can adversely affect network performance.

The default setting for the wiring configurations of the ports is auto-
MDI/MDIX. The default setting is appropriate for switch ports that
are connected to 10BASE-T and 100BASE-TX network devices
that also support auto-MDI/MDIX.

The default auto-MDI/MDIX setting is not appropriate for switch
ports that are connected to 10BASE-T and 100BASE-TX network
devices that do not support auto-MDI/MDIX and have a fixed wiring
configuration. For switch ports connected to those types of network
devices, you should disable auto-MDI/MDIX and set the wiring
configurations manually.

The appropriate MDI/MDIX setting for a switch port connected to a
10BASE-T and 100BASE-TX network device with a fixed wiring
configuration depends on the setting of the network device and
whether the switch and network device are connected with
straight-through or crossover cable. If you are using straight-
through twisted pair cable, the wiring configurations of a port on
the switch and a port on a network device must be opposite each
other, such that one port uses MDI and the other MDIX. For
example, if a network device has a fixed wiring configuration of
MDI, you must disable auto-MDI/MDIX on the corresponding
switch port and manually set it to MDIX. If you are using crossover
twisted pair cable, the wiring configurations of a port on the switch
and a port on a network device must be the same.