Install the S4810 | 27
You can connect the systems while they are powered down or up. Stacking ports are bi-directional. The 
S4810 supports stacking in either a ring or a cascade topology (
Figure 4-2
). To provide redundant 
connectivity, Dell Force10 recommends using the ring topology when stacking S4810 systems. 
Figure 4-2.  S4810 Stacking Topology
 
Connect Two S4810 Systems
To provide backup connectivity and increased data transfer between the systems, Dell Force10 
recommends inserting an additional cable between the two units, in a second stacking port, as shown in 
Figure 4-3
. 
You can use any of the SFP+ or QSFP+ ports for stacking, provided it is configured as a stacking port.
. CAUTION:  To connect S4810 systems, use only Dell Force10 supported stacking cables.
To connect two S4810 systems in a ring (
Figure 4-3
), starting with the S4810 at the bottom of the stack, 
follow these steps:
. NOTE: The port numbers in the following procedure are examples only. 
Step Task 
1 Insert one end of the first cable into stack port 60 in chassis 1 (bottom). 
2 Insert the other end of the same cable into stack port 52 on chassis 2 (top).
3 Insert a second cable into stack port 56 on chassis 2 (top).
4 Insert the other end of the second cable into stack port 56 on chassis 1 (bottom).
Ring Topology Cascade Topology
Chassis 1
Chassis 2
Chassis 3
52 60
48 56
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.....
52 60
48 56
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52 60
48 56
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52 60
48 56
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52 60
48 56
.....
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52 60
48 56
.....
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