Hello Michael, 3000-l Friends,

Re: Re: Trace Route GNU?

Michael wrote:
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It would be a waste of time.  Most (if not all) trace route programs use the
TTL field to timeout a packet before it reaches it's destination.  By doing
this they can force a packet to return to the originator (you) with a
timeout error and the name of the IP address it had reached when it timed
out.  By starting with a low TTL value and slowly increasing it on a per
packet basis you can find all your individual hops.  Unfortunately, the TTL
field is not accessible to HP/3000 programmers.  I don't know if this is
true, but I was told that the TTL field is actually hardcoded to some large
number (200 or 2000 or something like that).  The reason?  Why...no body
would ever want a packet to fail unless there was a problem, would they?
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Sorry for the news, but yes Michael is correct, a sockets interface to the
IP packet headers (including the TTL field in question) does not exist on
the 3000 yet.

I am aware of (3) Service Request under consideration by the lab which
deal with fully implementing the freeware/contributed traceroute tool on
the 3000 systems.

SR 5003382648
XPORT 5.x, Does not respond correctly to HP-UX TRACEROUTE command.

SR 5003193748
EH: Add possibility to create BSD sockets bound to ICMP protocol &
support for sending UDP packets to IP with option to specify TTL.

SR 5003442715
EH: Add HP-UX TRACEROUTE command functionality to MPE/iX systems.

I will give feed back to the lab that additional customers on 3000-L
news group have showing an interest in traceroute on the 3000.  I will
update this list if I get any feed back or hear of any progress from
the CSY networks lab.


Regards,

James Hofmeister
Hewlett Packard
Worldwide Technology Network Expert Center
P.S. My Ideals are my own, not necessarily my employers.