The GBIC Module (3C17714) provides your
SuperStack
®
3 Switch 4900 Family or 3Com
®
Switch
40x0 Family with four Gigabit Interface Convertor (GBIC)
expansion ports. The Module supports fiber Gigabit
Ethernet short-wave (SX), long-wave (LX) and long-haul
(LH70) GBIC transceivers in any combination. This offers
you the flexibility of using GBIC transceivers to provide
connectivity between the Switch and remote 1000 Mbps
workgroups or to create a high capacity aggregated link
backbone connection. The Module conforms to the full
duplex implementation of the Gigabit Ethernet stan-
dard, IEEE 802.3x.
The Module requires Gigabit Multilayer Switching (GMS)
software version 1.3 or later to be installed on the
Switch. This is supplied on the CD-ROM that
accompanies the Module. For instructions on upgrading
GMS software, refer to the documentation supplied with
your Switch.
The GBIC Module can also be used to interconnect two
SuperStack 3 Switch 4900 Family or 3Com Switch 40x0
Family units to create an XRN Distributed Fabric. Using
the GBIC Module in this way means you can have an
Fabric Interconnect extended up to 70 Km (43.5 miles)
between the units, if necessary (dependent upon GBIC
transceiver type).
To create an XRN Distributed Fabric you will need GMS
software version 4.0 or later (Advanced Feature License
3C1770V40) installed on both Switch units.
LEDs
You can gather information about the status of the
Module and its packet activity using the Expansion
Module LEDs on the front of the Switch and the Port
LEDs on the front of the Module.
I
NTRODUCTION
Module LEDs (Switch)
LEDs
Color
Indicates
Packet
Yellow
Packets are being transmitted/received on the module.
Off
No packets are being transmitted/received on the
Module.
GBIC Module operating in “normal mode”
Status
Yellow
The Module is installed and supported.
Yellow
flashing
The Module is installed but not supported. Note that the
Switch will continue to operate normally.
Yellow
flashing
(fast)
A port on the Module has failed POST and has been
automatically disabled.
Off
The Module is not installed.
GBIC Module operating in “XRN mode”
Status
Green
The Module is installed and one or more ports have “link
up”.
Yellow
The Module is installed and all the links are down.
Port LEDs (Module)
LEDs
Color
Indicates
Packet
Yellow
Packets are being transmitted or received on this port.
Off
There are no packets being transmitted or received on
this port.
Status
Green
A link is present and the port is enabled.
Off
There is no link present.
Green
flashing
A link is present and the port is disabled.
1
SuperStack
®
3 Switch 4900 GBIC Module (3C17714)
User Guide
DUA1771-4AAA02
