Creating Trunk Links Using Expansion Ports; Figure 2-19. Using A Cascade Cable To Increase Bandwidth On Baystack 281Xx Switches - Bay Networks BayStack 281 Series Manual

Creating Trunk Links Using Expansion Ports

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There are two ways to use the expansion port to connect BayStack 281xx
switches. One way is to use a 1 m cascade cable; the other is to use Model 514
or 515 transceivers and the transceiver cable. For connection instructions and
illustrations, see "Attaching Devices to the Baystack 281xx Switch" in
Chapter 3, "Installing the BayStack 281xx Switch."
When the expansion ports of two or more BayStack 281xx switches are
connected with a 1 m cascade cable, the link runs in full-duplex mode at
200 Mb/s. This means that the BayStack 281xx switch transmits at 200 Mb/s in
each direction, for a total bandwidth of 400 Mb/s. Whenever possible, the
BayStack 281xx switches should be connected using the 1 m cascade cable
(between expansion ports) to allow maximum bandwidth between
BayStack 281xx switches as shown in
BayStack 281xx switch
Model 28xxx
Cascade
cable (1m)
BayStack 281xx switch
Model 28xxx
Figure 2-19. Using a cascade cable to increase bandwidth on BayStack 281xx
switches
CAUTION: To connect the BayStack 281xx switches less than 1 meter apart,
it is very important to first turn on the power button for each BayStack 281xx
switch and allow the switch to finish diagnostics before connecting the
cascade cable to the expansion port. Connect the cascade cable to the
expansion port on each BayStack 281xx switch only after successful
diagnostics are complete or when the front panel display reads
"Operational: RUN."
Connecting BayStack 281xx Switches
Figure 2-19.
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