Making Connections 31
Switch Module (DFE-260S)
The DFE-260S switch module is used to allow interconnection between the
10Mbps and 100Mbps segments in the hub or hub stack. Each hub stack
should have one DFE-260S module (such as the one included in the DFE-
2616x, DFE-2616ix, DFE-2624x or DFE-2624ix) to allow 10Mbps and
100Mbps stations to intercommunicate.
Note that the DFE-260S module
can only be installed in Slot 1 – the center slot
. Also, the presence of
switch modules and their operational status can be viewed on the etwork
Monitoring – Bridge Information” screen.
NOTE:
In a stack containing a DFE-2616i, DFE-2624i,
DFE-2616ix, or DFE-2624ix intelligent master
hub, more than one DFE-260S switch module
may be used to provide increased reliability
through redundancy. The software manage-
ment agent can control the DFE-260S
modules to provide link redundancy and pre-
vent network loops but only when multiple
modules are installed in hubs on the primary
master segment.
Fiber Optic Module (DFE-260FX)
The Fiber Optic module provides a standard Fast Ethernet 100BASE-FX
fiber optic connector. A fiber optic connection of this kind is particularly
useful for creating a link between two DFE-2600 series hub stacks, placing
them in separate collision domains. A link of this sort eliminates the need for
an external switch to divide stacks into separate domains. Dividing the stacks
into separate collision domains overcomes the Fast Ethernet two-repeater
limitation, and effectively doubles overall bandwidth.
The Fiber Optic module includes the following LED indicators:
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