nanog mailing list archives

Re: Authoritative Resources for Public DNS Pinging


From: Tom Beecher <beecher () beecher cc>
Date: Fri, 11 Feb 2022 10:10:36 -0500


I am disappointed but not surprised to see this discussion on NANOG.
Encouraging Users to use a tool (that is often ignored by the hardware
targeted) by providing a non-revenue-creating special target does not make
business sense.


To be fair, I don't think this is unique to this community. Plenty of
conversations on the IETF lists that are fundamentally the same. (
Proposals to change X or implement standard Y to solve something that is
already solvable with current tech and standards. ) Really it's just the
complexity of the existing solution that's different. :)

On Fri, Feb 11, 2022 at 9:51 AM james.cutler () consultant com <
james.cutler () consultant com> wrote:

On Feb 11, 2022, at 8:33 AM, Tom Beecher <beecher () beecher cc> wrote:


The prediciate assumption that "pinging one destination is a valid check
that my internet works' is INCORRECT. There is no magical unicorn that
could be built that could make that true, and 'they're gonna do it anyways'
is a poor excuse to even consider it.


The predicate assumption that unsuccessful pinging one destination is a
valid check that my internet DOES NOT work' is  ALSO INCORRECT. Still no
magical unicorn.

I am disappointed but not surprised to see this discussion on NANOG.
Encouraging Users to use a tool (that is often ignored by the hardware
targeted) by providing a non-revenue-creating special target does not make
business sense.

An allied issue is educating ‘Users’ about traceroute AKA sequential ping
with TTL progression:


   -  Seeing missing or excessively long traceroute results from
   intermediate nodes does NOT indicate a real problem, especially when the
   target node is reachable with acceptable delay.


I’ve lost count of my replies on user forums explaining this issue, even
to otherwise well educated users.

To be blunt, browsing to amazon.com, apple.com or another vendor site is
a simple and easy to teach Internet aliveness check and, at least, offers
the chance for the targeted vendor site to receive revenue from sales. I
have no crisis of conscience from clicking an vendor shortcut for a basic
end-to-end Internet functional test. Or for teaching a User to do the same.
This meets the business purpose locally and requires no $pecial effort from
Users, network providers, or target systems. This precludes memorization of
IP addresses by end Users thus reducing the offered load from the likes of
excessive ping 8.8.8.8.

I would expect NANOG members to have favorite ping target addresses based
on their environment, e.g., default router and a few designated targets.
These are useful for manual debugging but, as mentioned previously, are not
suitable as singular input to network monitoring.


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