Subject: Re: [Int-area] I-D Action: draft-ietf-intarea-probe-00.txt

From: "Carlos Pignataro (cpignata)" <[email-masked]>
Date: Mon, 10 Jul 2017 19:14:39 +0000

Hi, Ron, Authors,

As I was reading over draft-ietf-intarea-probe-00, and wanted to share a couple of observations for your consideration.

  *   Have you considered the tradeoff of defining new ICMP Types versus extending existing ICMP Types? If using existing ICMPv6 Echo Request/Reply and extending them instead of defining brand new types, the backwards interoperability achieved is higher
  *   Have you considered using other protocols as well in addition to ICMP for the PROBE message, which can elicit ICMP errors or responses with appropriate extensions? In particular UDP is a protocol much used and desired for probes.

These two points actually reminded me of https://tools.ietf.org/html/draft-shen-traceroute-ping-ext-04 (and the ICMP-only predecessor draft-shen-udp-traceroute-ext-01) that defines a probe extension applied to ICMP Echo Request and UDP, and RFC 4884 extensions to responses. That approach seems somewhat more generic.

Additionally, I was also reminded of the ICMP AUP at RFC 7279, it would be useful to map against that doc to show how this is (as it is the case) a really good use of ICMP.

Thanks!

— Carlos.

On Jun 23, 2017, at 3:55 PM, [email-masked]<mailto:[email-masked]> wrote:

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Internet Area Working Group of the IETF.

       Title           : PROBE: A Utility For Probing Interfaces
       Authors         : Ron Bonica
                         Reji Thomas
                         Jen Linkova
                         Chris Lenart
                         Mohamed Boucadair
Filename        : draft-ietf-intarea-probe-00.txt
Pages           : 17
Date            : 2017-06-23

Abstract:
  This document describes a network diagnostic tool called PROBE.
  PROBE is similar to PING, in that it can be used to test the status
  of a probed interface.  It differs from PING in that it does not
  require bidirectional connectivity between the probing and probed
  interfaces.  Alternatively, PROBE requires bidirectional connectivity
  between the probing interface and a proxy interface.  The proxy
  interface can reside on the same node as the probed interface or it
  can reside on a node to which the probed interface is directly
  connected.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-intarea-probe/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-intarea-probe-00
https://datatracker.ietf.org/doc/html/draft-ietf-intarea-probe-00

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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—
Carlos Pignataro, [email-masked]<mailto:[email-masked]>

“Sometimes I use big words that I do not fully understand, to make myself sound more photosynthesis."