Specifies the value to store in the Differentiated
Services (DS) Field in the IP packet used to
encapsulate the traceroute probe. The DS Field is
defined as the Type of Service (TOS) octet in a IPv4
header or as the Traffic Class octet in a IPv6 header.
The value of this object must be a decimal integer
in the range from 0 to 255. This option can be used
to determine what effect an explicit DS Field setting
has on a traceroute response. Not all values are legal
or meaningful. DS Field usage is often not supported
by IP implementations. A value of 0 means that the
function represented by this option is not supported.
Useful TOS octet values are probably '16' (low delay)
and '8' ( high throughput).