Verify the VLAN Aggregation Configuration
  
  
    
      The following commands can be used to verify proper VLAN aggregation configuration:
     
    - 
        show vlan—Indicates the membership of
          subVLANs in a superVLAN.
      
- 
        show iparp—Indicates an ARP entry that
          contains subVLAN information. Communication with a client on a subVLAN must have occurred
          in order for an entry to be made in the ARP table.