Isolation Option for Communication Between
SubVLANs
  
  
    To facilitate communication between subVLANs, by
      default, an entry is made in the IP ARP table of the superVLAN that performs a proxy ARP
      function. This allows clients on one subVLAN to communicate with clients on another subVLAN.
      In certain circumstances, intra-subVLAN communication may not be desired for isolation
        reasons.
    
    
        To prevent normal communication between subVLANs, disable
          the automatic addition of the IP ARP entries on the superVLAN using the following
            command:
        disable subvlan-proxy-arp vlan
          [vlan-name | all]
Note   
The
          isolation option works for normal, dynamic, ARP-based client communication.