The mask which is used to enable selective debug levels in DHCP client module.Each allowed BIT in the integer, represents a particular level of Trace.The mapping between the bit positions & the level of trace is as follows: 0 - Event Trace 3 - packet Trace 4 - Bind Trace 6 - All Failure Traces The remaining bits are unused. Combination of levels are also allowed. For example if the bits 0 and 3 are set, then the Trace statements related to events and packets will be printed. The user has to enter the corresponding INTEGER VALUE for the bits set. For example if bits 0 and 3 are set then user has to give the value 9.