Howard,
It would seem that there's something wrong with the links in
that I'm unable to access either of the drafts you noted. It's also quite
possible that I simply didn't click on the link hard enough :-) Oh, I
know...much like a recent Cox communications commercial, maybe I simply
reached the end of the Internet. :->
thanks
Nigel
----- Original Message -----
From: "Howard C. Berkowitz"
To:
Sent: Thursday, October 31, 2002 1:14 AM
Subject: Re: Another Internet Draft of Interest [7:56560]
> "Nigel Taylor" All,
> > I just got through some of the presentations linked from the recent
> >nanog
> >meeting. The draft in question was presented by Henk Uijterwaal titled
> "New
> >Services from RIPE NCC.
> >
> >There is also this link on the nanog list to his latest draft.
> >
> >http://www.ripe.net/home/henk/draft-ietf-ippm-owmetric-as-01.txt
> >
> >I was just thinking about some of our current tools like ping, hping, and
> >traceroute which measures round trip delay vs one-way delay. RFC 2679
> >discusses numerous reasons for calculating one-way delay, however would
> >tools
> >like ping and traceroute with the existence of ping6 and traceroute6 be
> >rfc2679 compliant. I've not done any research at this point but, would
> >operational tools in everyday use benefit from this new active
measurement?
> >
> >Here's a pretty good link that explains the concept for the "normal"
folks
> >like myself.
>
> There are several problems with using timestamped measurement in the
> router itself. Some of these may be reduced with IPv6, but, for
> others, external passive hardware or special router hardware seems
> necessary. See our BGP convergence drafts,
> http://www.ietf.org/internet-drafts/draft-ietf-bgpconv-03.txt and
> http://www.ietf.org/internet-drafts/draft-ietf-bgpbas-00.txt
>
> First, routers may not give sufficient precision in measurement,
> because they rate-limit ICMP to protect against ICMP floods, or
> simply don't prioritize it highly. I mention IPv6 because
> authenticated source addresses may be used without fear of denial of
> service.
>
> Second, the router may or may not have the capacity to capture and
> store a statistically valid amount of data. NetFlow data export, for
> example, summarizes to a degree. If you could shoot debug to syslog,
> you'd have a much better chance as long as the router could keep up
> with it, using something like a SPAN port.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=56581&t=56560
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