Limitations
  
  
    The Extreme Networks implementation of NTP includes the following limitations:
    
      - SNTP (Simple Network Time Protocol) cannot be enabled at the same time
        NTP is enabled.
- The NTP multicast delivery mechanism is not supported.
- The NTP autokey security mechanism is not supported.
- The broadcast client option cannot be enabled on a per-VLAN
        basis.
- NTP authentication can be enabled globally. It cannot be enabled per VR.