Using SummitStack-V320 Stacking
A stacking rate of 320 Gbps can be achieved across a stack of X670-G2-48x-4q switches using the
QSFP+ connection and cables. These switches can use 80-Gbps stacking connections that provide 320
Gbps full-duplex bandwidth.
Examples of Valid Stacking Configurations
The X460-G2 accommodates the VIM-2ss SummitStack module, which provides SummitStack ports.
The examples in the following sections show various physical stacking arrangements: all switches in a
single rack, switches in two adjacent racks, and switches at the tops of several racks in a row.
Example: Basic Stack with Four Switches
This example shows a stack of four switches in a single rack.
The slot numbers presume a console connection to the switch at the top of the physical stack.
Figure 161 shows cable connections for a 4-node stack using SummitStack 40G cables to connect
switches with integrated SummitStack ports.
Figure 161: SummitStack Cable Connections Using Eight Switches with Integrated
SummitStack Ports
Table 99 lists the recommended order for connecting the stacking ports in this example.
Table 99: Basic Stack with Four Switches: Connections
Connect this slot and port . . . . . . To this slot and port
Slot 1 Stack Port 2 Slot 2 Stack Port 1
Slot 2 Stack Port 2 Slot 3 Stack Port 1
Building Stacks Connecting the Switches to Form the Stack Ring
ExtremeSwitching Hardware Installation Guide 215
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