Ask Your Question

Does Wireshark support L4S protocol

asked 2021-11-12 13:02:54 +0000

X4000 gravatar image

Does Wireshark support analysis on the new Explicit Congestion Notification (ECN) Protocol for Very Low Queuing Delay (L4S)

edit retag flag offensive close merge delete


A little light reading here (Low Latency, Low Loss, Scalable Throughput (L4S) Internet Service: Architecture) for those following along with the home game.

Chuckc gravatar imageChuckc ( 2021-11-12 18:38:46 +0000 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2021-11-12 13:17:06 +0000

grahamb gravatar image

updated 2021-11-13 13:31:35 +0000

Wireshark dissects and displays the ECN values including ECT(1) and CE but doesn't indicate that they mean that L4S is in use, nor is there any analysis with the TCP stream of L4S actions.

edit, fixed typo, ECN(1) -> ECT(1)

edit flag offensive delete link more


L4S technology is enabled by the carrier, if the carrier advise L4S is enabled I assume that the ECN values are true.

Note: A sender that wishes a packet to receive L4S treatment as it is forwarded, MUST set the ECN field in the IP header (v4 or v6) to the ECT(1) codepoint.

X4000 gravatar imageX4000 ( 2021-11-12 17:20:50 +0000 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools


Asked: 2021-11-12 13:02:54 +0000

Seen: 142 times

Last updated: Nov 13 '21