Leds - 3Com SuperStack 3 Getting Started Manual

negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.

LEDs

Table 4 lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see
It is not possible to determine the duplex mode from the LEDs. For more
detailed information, refer to the "SuperStack 3 Switch Management
Interface Reference Guide" on the CD-ROM that is supplied with the
Switch.
Table 4 LED behavior
LED Color
Port Status LEDs 10BASE-T/100BASE-TX ports
Green
Green flashing Packets are being transmitted/received on the port.
Yellow
Yellow flashing Packets are being transmitted/received on the port.
Green / Yellow
alternating
Off
Port Status LEDs SFP ports
Green
Green flashing Packets are being transmitted/received on the port.
Port Status LEDs 10/100/1000BASE-T ports
Green
Green flashing Packets are being transmitted/received on the port.
Yellow
Yellow flashing Packets are being transmitted/received on the port.
Green / Yellow
alternating
Off
Unit LEDs
1–4 Green
Off
"Solving Problems Indicated by LEDs"
Indicates
A 100 Mbps link is present and the port is enabled.
A 10 Mbps link is present and the port is enabled.
A 10 or 100 Mbps link is present, but the port is disabled.
No link is present.
A 1000 Mbps link is present and the port is enabled.
A 1000 Mbps link is present and the port is enabled.
A 10 or 100 Mbps link is present and the port is enabled.
A 10, 100 or 1000 Mbps link present but disabled.
No link is present.
When the Switch forms a stack with other Switch 4200
Family units the LED indicates the position of the unit in the
stack and that a link is present. Unit LED number 1 can also
indicate a stand-alone Switch.
The Switch initialization process is not complete.
About the Switch 4200 Series
on page 54.
15