Leds; Led Behavior - 3Com SUPERSTACK 4226T Getting Started Manual

Fiber GBIC's.
The default state for these ports is auto-negotiation enabled, where
speed, duplex and flow control modes are negotiated. Because the speed
and duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner. Alternatively, auto-negotiation can be
disabled and the flow control setting can be manually configured.
1000BASE-T GBIC's
These ports will auto-negotiate to 1000BASE-T, full duplex only. Although
it is not possible to disable auto-negotiation it is possible to change the
advertised capabilities for flow control support, effectively enabling or
disabling flow control.

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 GBIC ports
Green
Green flashing Packets are being transmitted/received on the port.
Port Status LEDs 10/100/1000BASE-T ports
Green
(continued)
"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.
About the Switch 4200 Series
on page 54.
15