Many UDP applications send only two packets in the form of a request and a reply. For such applications it is a waste of resources to set up a new binding and hardware connection for every request and then let each binding idle age out. With UDP-one-shot configured, a binding is created and the request packet is sent. The reception of a reply packet back causes the binding to be deleted within one second. Bindings created by UDP-one-shot will not result in the installation of a hardware connection.
Use the udp-one-shot command in SLB virtual server configuration command mode to enable UDP-one-shot on a virtual server.