tmnxL2tpTuDrain 1.3.6.1.4.1.6527.3.1.2.60.1.3.3.3.1.1

Setting this object to 'drain (0)' triggers an attempt to drain this L2TP tunnel. Setting it to 'stopDrain (1)' stops the draining. Reading this object returns the value 'notApplicable'.