Ah, but there's the rub... ISPs who are "discreet" in how they wish their infrastructure to be "viewed" will continue to engineer methods in which portions are not visible to the public at-large. Somehow, I don't think that will ever go away, so trying to tilt at windmils w.r.t. (paraphrased) "...what interface an ICMP foo is sourced from..." is, indeed... tiling at windmills, methinks. :-) Cheers! - ferg -- "Chris L. Morrow" <christopher.morrow@verizonbusiness.com> wrote: On Tue, 26 Sep 2006, Fergie wrote:

Chris,

So, I'm wondering: What happens when you have a traceroute tool that shows you MPLS-lableled hops, too? :-)

:) depends on the network I guess... I'm not sure it's going to tell you anything about hops hidden by mpls lsp's that don't decrement ttl though... -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg(at)netzero.net ferg's tech blog: http://fergdawg.blogspot.com/