3Com 3C17304 Getting Started Guide - Page 15

LEDs, Table 4, Solving Problems Indicated by LEDs, - support

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About the Switch 4200 Series 15 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. 1000BaseT 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 "Solving Problems Indicated by LEDs" on page 54. 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 Indicates Port Status LEDs 10BASE-T/100BASE-TX ports Green A 100 Mbps link is present and the port is enabled. Green flashing Packets are being transmitted/received on the port. Yellow A 10 Mbps link is present and the port is enabled. Yellow flashing Packets are being transmitted/received on the port. Green / Yellow A 10 or 100 Mbps link is present, but the port is disabled. alternating Off No link is present. Port Status LEDs GBIC ports Green A 1000 Mbps link is present and the port is enabled. Green flashing Packets are being transmitted/received on the port. Port Status LEDs 10/100/1000BASE-T ports Green A 1000 Mbps link is present and the port is enabled. (continued)

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About the Switch 4200 Series
15
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.
1000BaseT 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
“Solving Problems Indicated by LEDs”
on
page 54
.
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
Indicates
Port Status LEDs 10BASE-T/100BASE-TX ports
Green
A 100 Mbps link is present and the port is enabled.
Green flashing
Packets are being transmitted/received on the port.
Yellow
A 10 Mbps link is present and the port is enabled.
Yellow flashing
Packets are being transmitted/received on the port.
Green / Yellow
alternating
A 10 or 100 Mbps link is present, but the port is disabled.
Off
No link is present.
Port Status LEDs GBIC ports
Green
A 1000 Mbps link is present and the port is enabled.
Green flashing
Packets are being transmitted/received on the port.
Port Status LEDs 10/100/1000BASE-T ports
Green
A 1000 Mbps link is present and the port is enabled.
(continued)