nanog mailing list archives

Re: Authoritative Resources for Public DNS Pinging


From: "J. Hellenthal via NANOG" <nanog () nanog org>
Date: Fri, 11 Feb 2022 09:18:03 -0600

Huh


-- 

J. Hellenthal

The fact that there's a highway to Hell but only a stairway to Heaven says a lot about anticipated traffic volume.






On Feb 11, 2022, at 09:10, Tom Beecher <beecher () beecher cc> wrote:

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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