Cisco 2651XM-V, Руководство по установке оборудования

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Catalyst 3750 Switch Hardware Installation Guide
78-15136-02
Chapter 3 Switch Installation
Connecting to the 10/100 and 10/100/1000 Ports
Follow these steps to connect to 10BASE-T, 100BASE-TX or 1000BASE-T
devices:
Caution
To prevent electrostatic-discharge (ESD) damage, follow your normal board and
component handling procedures.
Step 1
When connecting to workstations, servers, routers, and Cisco IP Phones, connect
a straight-through cable to an RJ-45 connector on the front panel. (See
Figure 3-40 .) When connecting to switches or repeaters, use a crossover cable.
(See the “Cable and Adapter Specifications” section on page B-6 for cable-pinout
descriptions.)
Note
When connecting to 1000BASE-T-compatible devices, be sure to use a
twisted four-pair, Category 5 cable.
Note
On switches running Cisco IOS Release 12.1(14)EA1 or later, you can
use the
mdix auto command in the CLI to enable the automatic crossover
feature. When the automatic crossover feature is enabled, the switch
detects the required cable type for copper Ethernet connections and
configures the interfaces accordingly. Therefore, you can use either a
crossover or a straight-through cable for connections to a copper 10/100
or 10/100/1000 port on the switch, regardless the type of device on the
other end of the connection.
The automatic crossover feature is disabled by default. For configuration
information for this feature, refer to the switch software configuration
guide or the switch command reference
.
Step 2
Connect the other end of the cable to an RJ-45 connector on the other device. The
port LED turns on when both the switch and the connected device have
established link.
The port LED is amber while Spanning Tree Protocol (STP) discovers the
topology and searches for loops. This takes about 30 seconds, and then the port
LED turns green. If the port LED does not turn on, the device at the other end