ipv6 nd reachable-time (for a port)
   
   
      Configure the neighbor reachable time.
    
      
      Command Parameters
         
         
            
               - reachable-time <0-3600000>
- Specifies a value (in
                  milliseconds) placed in the router advertisement message sent by the router. The
                  value zero means unspecified (by this system). 
- Configure the amount of time that
                  a remote IPv6 node is considered reachable after a reachability confirmation
                  event.
Command Mode
         
         GigabitEthernet Interface Configuration