Implementation Draft Interop

Parameters and version

• QUIC Version 1 (vn=0x1)

• HTTP 3 (ALPN=h3)

• HTTP 0.9/1.1 (ALPN=hq-interop)

• Transport parameter: 0x0f739bbc1b666d04 (draft-ietf-quic-multipath-04)

References

• List of implementations here

• Google sheet with results is here

Core Features Tested

Feature	code	details
Handshake	H	The handshake completes with successful negotiation of enable_multipath transport parameter (both ends indicate 0x01)
Path Validation	V	Client sends PATH_CHALLENGE frame to open a new path and server replies with PATH_RESPONSE
Send data	D	Stream data (of one of more streams) is send on all paths; ACK_MP frames are sent and processed
Path Close	C	Client closes a path with PATH_ABANDON frame

Optional Features Tested

Feature	code	details
CID change	I	A server offers new CIDs to a client in advance. Upon some events, the client starts using a new server CID on one path
Path status	S	Client sends PATH_STANDBY and PATH_AVAILABLE frames
Key Update	U	One endpoint updates keys and sends at least one packet with the new key on all active paths
Multipath ACK	A	One endpoint sends data and the other endpoints sends ACK (randomly) on all path independent of where data is received
CID retirement	R	One endpoint send an RETIRE_CONNECTION_ID for an active path
Migration	M	Change CID and 4-tuple e.g. port on an existing path