A value which indicates to which other agents in the
system traps should be sent. The value is a sum. It
initially takes on the value 0, then for each agent which
is to receive traps, 2 raised to the value of
(a3ComSysSnmpAgentId - 1) for that agent is added to the sum.
Note that only traps which are enabled according to the
value of the a3ComSysSnmpInternalAgentTrapMask object will be
forwarded, and that each trap which is forwarded will
be transmitted to each agent identified by this mask.