Additionally: > On Aug 7, 2025, at 1:15 PM, Templin (US), Fred L > <[email protected]> wrote: > > Many tunneling protocols live by “grace” and assume 1500 everywhere. But, > robust > tunneling protocols need to live by the “law”, and the law says 1280.
And its subtle - for IPv4, they assume 1500 everywhere but it’s really 576 after reassembly at the receiver. For IPv6, it’s 1280 over each hop BUT up to 1500 after reassembly at each receiver. These and other aspects are why this isn’t just an op-ed. Joe
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