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On 9/7/2023 2:14 PM, Dimiter_Popoff wrote:
> On 9/7/2023 23:30, Don Y wrote:
>> How do you address the case of your (GUI) client discovering some other
>> DHCP service running on the network?
>
> This is another point added to my approach "sell them a router you have
> set up". In fact I had exactly this at some point, a customer for our
That just brings up a different set of problems.
You have to pick a range of IPs for the router`s clients.
How do you know that your choices won`t conflict with other
hosts in their organization?
> TLD readers decided to stray from the router we had delivered with the
> units they had purchased. The people who had to do the measurements
> (sometimes 1000+ a day) had no access to the corporate router so someone
> there had set some fixed IP addresses for our devices on their
> network, not behind the router we supplied. Things worked - until they
> did not.
> They started to call "your device won`t boot at times".
> "Does the LED always indicate the unit did get an IP address?"
> "Yes it does."
> Well does it always boot behind the router we supplied?
> "Hmm let us test... Yes it does"
There is ALWAYS an advantage to be had from having a known,
working configuration that you can coax the user back to
trying.
But, getting from there to something that fits *his* needs
can be problematic (as above).
> [Most likely this was yet another sabotage against our devices at
> this customer (they have no legit second dhcp server there so someone
> must have set one up, the problems started some time after they changed
> routers and well, they have a history of sabotage attempts there, there
> was physical evidence for that).]
>
> If a design can afford a cheap router just include one and save yourself
> all the headache (that to the OP). Other than that, you are stuck to
> my other solution, which works - just technically, I saw no evidence
> anyone used it ever. People either can do what it takes with their
> router/network or they use the router we supply.
I think the best approach for bootstrapping headless devices,
*today* would be to embed BLE (severely range constrained) or,
preferably, NFC in the device and kludge an interface that can
rely on something (app) present in all/most cell phones to bridge
the gap to a "familiar" UI.
But, this will still only address the one-off sites. Handling
hundreds or thousands of devices (as is my bootstrap case) will
always be a challenge -- esp if no techies around to deal with it!
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