10Base-T / 100Base-Tx Ports; Leds - 3Com SuperStack II Switch 3000 10/100 User Manual

1-8 C 1: G
HAPTER ETTING

10BASE-T / 100BASE-TX Ports

The Switch has 12 auto-negotiating 10BASE-T /
100BASE-TX RJ45 ports configured as MDIX
(cross-over). These ports can be set to 10BASE-T,
100BASE-TX, or they can automatically detect the
speed of a link and provide a 10Mbps connection to
Ethernet devices or a 100Mbps connection to Fast
Ethernet devices. The maximum segment length is
100m (328ft) over category 5 UTP or STP cable.
As these ports are configured as MDIX (cross-over),
you need to use a cross-over cable to connect to
devices whose ports are MDIX-only. Most of the
10BASE-T and 100BASE-TX ports in 3Com devices
are MDIX-only.

LEDs

Table 1-1 describes the LED behavior on the Switch
3000 10/100. For more details about corrective
action in the event of a problem, refer to
page C-1.
S
TARTED
"LEDs"
Table 1-1 LED behavior
LED Color
Port Status LEDs (ports 1–12)
Packet Yellow
Status Green
Green flashing
Off
Plug-in Module Status LEDs (port 13)
Packet Yellow
Status Green
Green flashing
Green flashing
(long on, short off)
Yellow
on
Yellow flashing
Off
Unit Status LEDs
Power Green
MGMT Green
Green flashing
Yellow
Yellow flashing
Indicates
Frames are being transmitted/received
on the port.
Link is present; port is enabled.
Link is present; port is disabled.
Link is not present.
Frames are being transmitted/received
on the Plug-in Module port.
Link is present; port is enabled.
Link is present; port is disabled.
Refer to the "SuperStack II Switch
ATM OC-3c Module User Guide".
Plug-in Module has failed its Power On
Self Test (if the MGMT LED is flashing
yellow), or the agent software of the
Plug-in Module is not installed cor-
rectly.
Plug-in Module is not recognized.
Link is not present or Plug-in Module
is not installed in the Switch.
Switch is powered-up.
Switch is operating normally.
Switch or Plug-in Module is either
downloading software or initializing
(which includes a Power On Self Test).
Switch has failed its Power On Self
Test.
Plug-in Module has failed its Power On
Self Test.