Installation Guide

Table 85: Basic Stack with Eight Switches: Connections (continued)
Connect this slot and port . . . . . . To this slot and port
Slot 7 Stack Port 2 Slot 8 Stack Port 1
Slot 8 Stack Port 2 Slot 1 Stack Port 1
Example: Stack with VIM1-SummitStack Modules
Figure 128 shows an example of a four-switch stack that combines two dierent switch models: two of
each model; four switches in all. For the first switch model, the stacking ports are on installed VIM1-
SummitStack modules. For the second switch model, the stacking ports are on installed SummitStack
stacking modules. The recommended order for connecting the stacking ports is the same as for the
example in Example: Basic Stack with Eight Switches on page 173.
Figure 128: SummitStack Configuration Using Dierent Switch Models and
SummitStack 40G Cables
Example: Stacked Switches across Two Racks
The following example shows four switches – two of one model, two of another model – physically
located in two adjacent racks.
Each rack has a switch of one model at the top, with a switch of another model below it. The switches
are connected into a stack using SummitStack ports on installed VIM2-SummitStack and VIM1-
SummitStack modules. In this example, start by connecting the top switches together; they will be
designated the stack master and backup nodes (slot 1 and slot 2, respectively).
Building Stacks
ExtremeSwitching and Summit Switches: Hardware Installation Guide 174