I am interested in knowing if router vendors have implemented the algorithm described in the RFC 1393 for traceroute utility. I am also interested in knowing why the 'F' 'C' "Number' fields are needed in the format for IP Traceroute option.
Thanks.
JRL
My guess is that nobody implements this IP Option.
All IP Options have this. The "F" flag specifies whether the option should be copied to individual fragments when fragmentation is performed. "C" is a two-bit "class" of option, of which only two values are defined, 0 for "control" and 2 for "debugging and measurement". The "Number" specifies the type of option. This results in an 8-bit value for each IP option.
For the Traceroute option, F=0 (not copied to fragments), C=2 (debugging/measurement), number=18, so the option byte has the value ((0
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