Use the specified IP address (which must be given
as an IP number, not a hostname) as the source
address in outgoing probe packets. On hosts with
more than one IP address, this option can be used
to force the source address to be something other
than the primary IP address of the interface the
probe packet is sent on. If the IP address is not
one of this machine's interface addresses, an error
is returned and nothing is sent. A zero length
octet string value for this object disables source
address specification.
The address type (InetAddressType) that relates to
this object is specified by the corresponding value
of traceRouteCtlSourceAddressType.