Chapter 5: Building a SummitStack Configuration
Summit Family Switches Hardware Installation Guide
216
Using the SummitStack-V Feature
Figure 154 shows an example of a stacking configuration that combines native and alternate stacking
ports to form a stack of seven switches.
The Summit X650 series switches in slots 1 and 2 are connected through their native stacking ports on
installed VIM1-SummitStack256 modules, using SummitStack128 stacking cables. Each Summit X650
series switch is connected through an alternate stacking port to an installed XGM2-sf option card in a
Summit X450a series switch at another location. These connections use fiber cables connected to
10-Gbps SFP+ ports.
The Summit X450a series switches in slots 3, 4, and 5 are connected through their native stacking ports
using SummitStack 40G cables. The Summit X450a switch in slot 5 is connected to the switch in slot 6
through alternate stacking ports on installed XGM2-2sf modules, using fiber optic cable. The switch in
slot 6 is connected to the switch in slot 7 using native stacking ports and SummitStack 40G cables.
Figure 154: Using the SummitStack-V Feature
Table 76 lists the recommended port connection sequence for this example.
Table 76: Stacking Connections Using Native and Alternate Stacking Ports (7-Switch Stack)
Connect this slot and port . . . . . . To this slot and port
Slot 1 Native Stack Port 2 Slot 2 Native Stack Port 1
Slot 2 Alternate Stack Port 2 Slot 3 Alternate Stack Port 1
Slot 3 Native Stack Port 2 Slot 4 Native Stack Port 1
Slot 4 Native Stack Port 2 Slot 5 Native Stack Port 1
Slot 5 Alternate Stack Port 2 Slot 6 Alternate Stack Port 1
Slot 6 Native Stack Port 2 Slot 7 Native Stack Port 1
Slot 7 Alternate Stack Port 2 Slot 1 Alternate Stack Port 1
SH_230
X650 Switches
X450a Switches
Slot 1
Slot 4
Slot 2
Slot 3
Slot 5
Slot 7
Slot 6
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