7 Sep
2026
7 Sep
'26
11:42 a.m.
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/