Hi,
On Thu, Nov 29, 2001 at 03:43:10PM -0500, Scott Morris wrote:
> No. Traceroute is simply program.
>
> Unix and Cisco IOS choose to use a UDP variant of it. Microsoft uses a
> straight ICMP.
Hmmm, you word it as if "ICMP is the right (or 'original') way of doing
it" - it isn't, VJ wrote the Unix version, using UDP.
> Doesn't icmp have it's own traceroute extension, just like echo and
> echo reply, or is that just Cisco adding it on? I remember reading this
> somewhere but I cannot verify this. Anyone know?
IP has a "record route" option that can be set in the header. It's
limited by the maximum length of an IP header, so it can only record
a small number of hops, and is thus not widely used. Also machines
in between have to support it, and not all do.
gert
-- Gert Doering Mobile communications ... right now writing from *Enschede(NL)* ... mobile phone: +49 177 2160221 ... or mail me: gert@greenie.muc.de
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