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port <number>- Enter the port number of the 40GbE port to be split. The range is 48 to 60.
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portmode quad - Configure a 40GbE port to operate in 4x10GbE mode.
Example of splitting a QSFP+ port to SFP+ ports
stack-unit 0 port 52 portmode quad
Important Points to Remember
•
You cannot use split ports as a stack-link to stack an S5000 unit.
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The quad port must be in a default configuration before you can split it into four 10GbE SFP+ ports. When you split the port, the
40GbE port is lost in the running configuration. Be sure that the port is also removed from other L2/L3 feature configurations.
•
For the split-port change to take effect, you must reload the system after issuing the CLI change commands.
Connecting the Stacking Ports (Optional)
Before you make your stacking port connections, rack-mount the systems or insert them into a cabinet. To connect the stacking ports,
insert one end of the optical cable into a configured port and insert the other end of the optical cable into a similarly configured port of the
adjacent system. There are no unique stacking ports; you can configure the SFP+ and QSFP+ ports to act as stacking ports. The SFP+
ports are labeled 0 to 47. The QSFP+ ports are labeled 48 and 56 for the lower ports and 52 and 60 for the upper ports.
NOTE:
You can connect up to six S5000 switches in a single stack.
NOTE:
The S5000 system does not stack with other S-Series systems.
NOTE:
Stacking is not supported on 40GbE ports operating in 4x10GbE (quad) mode.
NOTE:
If you use three or more S5000 units in a stack, you can connect up to a maximum of eight 10GbE ports or two
40GbE ports in links between peer switches. If you use only two S5000 units in a stack, you can connect up to four
40GbE ports in links between the two switches.
•
Data ports are configured as stacking ports in predefined stacking groups of 40GbE (four 10GbE ports or one 40GbE port).
•
Stacking ports are divided into 16 stack-groups (0 to 15). Each set of four 10GbE ports on an Ethernet module or each fixed 40GbE
port on the front panel correspond to a stack group. Each stack group has 40GbE of bandwidth. When a stack-group number is
assigned, the ports associated with that group are configured as stacking ports.
•
stack-group 0 = ports 0–3, stack-group 1 = ports 4–7, stack-group 2 = ports 8–11, and so on through stack-group 11 = ports 44–
47.
•
stack-group 12 = port 48, stack-group 13 = port 52, stack-group 14 = port 56, stack-group 15 = port 60.
•
All the ports in a stack-group are placed in stacking mode. You cannot use the unused ports in that group as data ports.
Figure 23. Stack-Group Assignments
You can connect the systems while they are powered down or up. Stacking ports are bidirectional. The S5000 supports stacking in either
a ring or a daisy-chain topology. To provide redundant connectivity, Dell EMC recommends using the ring topology when stacking S5000
systems.
Installation
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