RFC 3540 · HISTORIC · 2003

Robust Explicit Congestion Notification Signaling with Nonces

Overview

RFC 3540, “Robust Explicit Congestion Notification Signaling with Nonces”, is a Historic document published in June 2003 by N. Spring, D. Wetherall, D. Ely. The canonical text is published by the RFC Editor.

Abstract

This note describes the Explicit Congestion Notification (ECN)-nonce, an optional addition to ECN that protects against accidental or malicious concealment of marked packets from the TCP sender. It improves the robustness of congestion control by preventing receivers from exploiting ECN to gain an unfair share of network bandwidth. The ECN-nonce uses the two ECN-Capable Transport (ECT)codepoints in the ECN field of the IP header, and requires a flag in the TCP header. It is computationally efficient for both routers and hosts. This memo defines an Experimental Protocol for the Internet community.

Abstract as published in the RFC, via rfc-editor.org.

What “Historic” means

A specification that has been superseded or is otherwise no longer recommended for use.

Read this RFC

The canonical text of RFC 3540 is hosted at rfc-editor.org. Available in TXT,HTML.

Other RFCs from 2003

Who Is Online

In total there are 73 users online: 0 registered, 68 guests and 5 bots.

Most users ever online was 1,226 on 13 Jun 2026, 3:56 am.

Bots: AhrefsBot Applebot Baiduspider Other Bot SemrushBot

Users active in the past 15 minutes. Total registered members: 354