target = "https://www.rfc-editor.org/rfc/rfc9000#section-8.2.3" [[exception]] quote = ''' However, the endpoint MUST initiate another path validation with an expanded datagram to verify that the path supports the required MTU. ''' reason = ''' s2n-quic rounds up path validation frames to 1200 bytes so MTU is always validated as part of path validation. '''