Configuring Stacking Port Operation with the VIM3-40G4X Option
    Card
  
  
    
      Configure port partitions and select between the native and alternate
        stack ports. When the VIM3-40G4X option card is installed, you can use the following ports
        for stacking:
          - 
            The native stacking ports on the VIM3-40G4X option card, which can
              be configured for an 80 Gbps, 160 Gbps, or 320 Gbps data rate. These ports can also be
              partitioned to operate as one 40 Gbps data port or four 10 Gbps data ports. 
- 
            The alternate stacking ports, which are defined in the
            following
            table. 
 
    
    After a configuration change, you must restart
      the switch to use the stacking ports.