Dell Force10 S25P Manual - Page 26
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While the diagram, above, shows A-B port connections, the ports are bi-directional, so you can connect A
to A and/or B to B, as shown below in examples of two-switch
(Figure 17 on page
Figure 15
shows the use of 24G stacking ports in each of the two rear modules to create a ring. Of course,
this topology does not allow the use of the rear modules for XFP ports. A cascade topology, removing the
stack port modules in the B slots of switches 1 and 2, would free those slots for use by XFP modules.
Figure 15 Stacking Topology Using 24G Single-port Modules
Switch 1
Switch 2
Switch 3
Connecting Two Switches
Insert one end of the special stacking cable into a stack port, and insert the other end into a stack port of the
adjacent switch. Optionally, insert a second cable into the other open stack port, as shown in
The second cable provides both backup connectivity and increased data transfer between the units.
tack Ports of Two S25P Switches Connected in a Ring
Figure 16 S
STACK
STACK
Stack Port A
Note: These diagrams and instructions use "Stack Port A" and "Stack Port B" for clarifying the
connections, but the modules are not labeled.
26
27) ring topologies.
Module A
A
A
A
STACK
STACK
Stack Port B
(Figure 16 on page
Module B
B
B
B
26) and three-switch
Ring topology
using two
24Gig modules
per unit
Installing the S25P
Figure
14.