Dell Force10 S25-01-GE-24P, Руководство пользователя

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Installing the S25P System 27
Connecting Three Switches
Force10 recommends the ring topology, as outlined above ( Figure 14 on page 25 ), for stacking S-Series
switches, providing redundant connectivity. Using the example of three switches in the stack ( Figure 16 ):
1 Starting with the switch at the bottom of the stack, insert one end of the first cable into Stack Port A.
2 Insert the other end of the first cable into Stack Port A of the middle switch.
3 Insert the second cable into Stack Port B of the middle and top switches.
4 Connect the remaining cable to the top and bottom switches by inserting one end of the cable into the
open Stack Port B of the bottom switch and the other end of the cable into Stack Port A of the top
switch.
Figure 17 S25P Rear View Showing Ring Topology Stacking
Supplying Power
Supply power to the units in a stack only after they are mounted and the stack ports are connected. There is
no on/off switch, and the stack members partly determine the stack management unit from the order in
which they come online (see below).
The S25P switch has two AC receptacles in the rear of the chassis (see Figure 2 on page 9 ). The system can
use either power source independently, or act in load-sharing mode. Failover is hitless.
Danger: To prevent electrical shock, make sure the switch is grounded properly. If you do not ground
your equipment correctly, excessive emissions can result. Use a qualified electrician to ensure that the
power cables meet your local electrical requirements. See other relevant cautions in
Information Symbols
and Warnings on page 5 .
STACK STACK
STACK STACK
STACK STACK
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Stack Port A Stack Port B