Re: Charging for IPs

[William Herrin via NANOG <nanog () lists nanog org>]

On Mon, Sep 7, 2026 at 12:53 AM Gary Sparkes via NANOG
<nanog () lists nanog org> wrote:
> I was not aware that much (if any?) IPv4 code cared about PMTUD

If you miss an ICMP fragmentation needed message, TCP breaks hard.
Data stops flowing and the connection times out. There's an optional
standard to get around this but it's not widely implemented.

Regards,
Bill Herrin



-- 
For hire. https://bill.herrin.us/resume/
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