SummitStack 64G/20G cables are used to connect the 64-Gbps
                stacking ports on Summit X480 series switches to 20-Gbps stacking ports on Summit
                X480 series, Summit X650 series, or other Summit series switches.
            The 64-Gbps ports are on VIM2-SummitStack128 modules in Summit
                X480 series switches. The 20-Gbps ports are on one of the following:
                    - VIM1-10G8X module installed in a Summit X650 series
                            switch
                    
 
                    - VIM1-SummitStack module in a Summit X650 series
                            switch
                    
 
                    - VIM2-SummitStack module in a Summit X480 series
                            switch
                    
 
                    - Rear panel of Summit X250e, X450, X450a, or X450e series
                        switches
 
                
             
            Follow these steps to connect a SummitStack 64G/20G cable: