Add a note about conflicting node CIDRs #20204

[wokalski]

Fixes #20204

Signed-off-by: Wojtek Czekalski me@wczekalski.com

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Fixes: #20204

I am not a great doc writer but I hope this is enough to get the ball rolling. My team collectively spent 1 day debugging this so I hope we can save others from it.

[gandro]

Thanks! One minor correction needed

[gandro]

Thanks for addressing the feedback. Could you please squash all commits into a single commit?

[wokalski]

Could you please squash all commits into a single commit?

Done.

Thanks everyone for the quick turnaround. Such open source leadership makes me really bullish about the project!

[qmonnet]

Looks good, thank you!