Service Manual

are the master and standby when the stack boots up, you can assign unit numbers using the stack-
unit renumber command.
• Stack-group numbers: Stacking ports are divided into 16 stack-groups (from 0 to 15), as shown in the
following illustration. Each set of four 10 GbE ports on an Ethernet module or each fixed 40 GbE port on
the front panel correspond to a stack group. Each stack group has 40 GbE of bandwidth.
Usage Notes:
• Stacking is not supported on Fibre Channel ports.
• If you use a Fibre Channel module in an S5000 switch, stacking is not supported on Ethernet ports.
• If you use three or more S5000 units in a stack, you can connect up to a maximum of eight 10 GbE
ports or two 40 GbE ports in links between peer switches.
• If you use only two S5000 units in a stack, you can connect up to four 40 GbE ports in links between the
two switches.
Stack groups 0 through 11 consist of four 10 GbE ports; stack groups from 12 to 15 consist of one 40G port as
follows:
Stack Group Ports
0 0 to 3
1 4 to 7
2 8 to 11
3 12 to 15
4 16 to 19
5 20 to 23
6 24 to 27
7 28 to 31
8 32 to 35
9 36 to 39
10 40 to 43
11 44 to 47
12 48
13 52
14 56
15 60
Stacking 1027