Installation Guide

Table 157 lists the recommended order for connecting the stacking ports in the example stack shown in
Figure 219 on page 293.
Table 157: Recommended Order for Connecting Stacking Ports
Connect this slot and port . . . . . . To this slot and port
Slot 1 Stack Port 2
(physical ports 2 and 4)
Slot 2 Stack Port 1
(physical ports 1and 3)
Slot 2 Stack Port 2
(physical ports 2 and 4)
Slot 3 Stack Port 1
(physical ports 1 and 3)
Slot 3 Stack Port 2
(physical ports 2 and 4)
Slot 1 Stack Port 1
(physical ports 1 and 3)
Note
SummitStack-V320 stacking can be mixed with V160, V80, and 10G alternate port stacking.
For example, a Summit X460 with SummitStack-V80 could be added to the sample stack in
Figure 219 on page 293. However, you must restrict the speed of the ports on the
VIM3-40G4X and VIM4-40G4X that connect to any ports on nodes operating at slower
speeds. To reduce the speed of ports on the VIM3-40G4X or VIM4-40G4X, use the configure
stacking-support stack-ports selection command. For more information about configuring
stacking ports, see the ExtremeXOS 16.2 User Guide.
Table 158 lists the port pairings for SummitStack V-320 using the front panel ports on the Summit X770
switch.
Table 158: Physical Port Pairings for Front Panel Ports
Summit X770-32q
Paired physical ports Stacking port
101 and 103 S1
102 and 104 S2
Using the VIM1-SummitStack512 Module
The VIM1-SummitStack512 versatile interface module allows you to connect two Summit X650 series
switches in a cross-over or back-to-back configuration, using SummitStack 128G cables.
This configuration provides two bidirectional links operating at 256 Gbps between the two switches.
Figure 220: Stacking Connections Using VIM1-SummitStack512 Modules and
SummitStack 128G Cables
Connecting the Switches to Form the Stack Ring
Building Stacks
294 Summit Family Hardware Installation Guide