Reference Guide

868 | Stacking
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Example: Figure 47-7 shows an example of how to configure two new S5000 switches for stacking using
10GbE ports. Figure 47-8 shows how to verify the S5000 stack configuration.
5 Assign a number to the stack unit, where:
stack-unit 0 is the default stack-unit number.
stack-unit unit-number is the new stack-unit number. Valid
values: 0 to 11.
After you reconfigure the unit number, you are prompted to
reload the switch. Type yes to confirm; type no to exit.
Before the switch reloads, you are prompted to save the
configuration. Type yes to confirm and to reload the switch.
stack-unit 0 renumber
unit-number
Yes
Yes
EXEC Privilege
6 Repeat Step 5 on each stack unit to configure the stack-unit number of the master, standby, and member units.
7 Enable a group of four 10GbE or a single 40GbE port in
stacking mode, where:
stack-unit unit-number is the stack-unit number.
stack-group group-number is group of four 10GbE ports or
one 40GbE port as described in Table 47-1. Valid values: 0
to 15.
stack-unit unit-number
stack-group group-number
CONFIGURATION
8 Save the stacking configuration to the startup configuration.
write memory
EXEC PRIVILEGE
9 Repeat Steps 7 and 8 on each stack unit to configure the stack ports on the master, standby, and member units.
10 Reboot each switch, one after another, in as short a time as
possible.
reload
EXEC PRIVILEGE
FTOS Behavior:
After the 10GbE ports in a stack group are configured for stacking, the ports cannot be used for
Ethernet data transmission. For example, if you enable stack group 0 for stacking and only connect
ports 0 and 1 to a peer switch, ports 2 and 3 must remain unused for Ethernet data links.
If you do not assign a priority and renumber each stack unit and the stacked switches reboot at
approximately the same time, the switch with the highest MAC address is automatically elected as the
master switch. The switch with the next highest MAC address is elected as standby. As each switch
joins the stack, it is assigned the lowest available stack-unit number from 0 to 11. The default
configuration of each stacked switch is stored in the running configuration of the stack. The stack-unit
ID numbers are retained after future stack reloads.
To verify the stack-unit number assigned to each switch in the stack, use the
show system brief
command (Figure 47-8).
To display complete information on an S5000 stack, use the
show system command (Figure 47-9).
Step Task Command Syntax Command Mode