diff --git a/draft-ietf-quic-transport.md b/draft-ietf-quic-transport.md index 92e72dcf08..847018e7c0 100644 --- a/draft-ietf-quic-transport.md +++ b/draft-ietf-quic-transport.md @@ -3149,11 +3149,11 @@ sent in a single IP packet. The payload of a UDP datagram carrying the first Initial packet MUST be expanded to at least 1200 bytes, by adding PADDING frames to the Initial packet and/or by -combining the Initial packet with a 0-RTT packet (see {{packet-coalesce}}). -Sending a UDP datagram of this size ensures that the network path supports a -reasonable Maximum Transmission Unit (MTU), and helps reduce the amplitude of -amplification attacks caused by server responses toward an unverified client -address; see {{address-validation}}. +coalescing the Initial packet (see {{packet-coalesce}}). Sending a UDP datagram +of this size ensures that the network path supports a reasonable Maximum +Transmission Unit (MTU), and helps reduce the amplitude of amplification attacks +caused by server responses toward an unverified client address; see +{{address-validation}}. The datagram containing the first Initial packet from a client MAY exceed 1200 bytes if the client believes that the Path Maximum Transmission Unit (PMTU)