RFC 4638 · INFORMATIONAL · 2006

Accommodating a Maximum Transit Unit/Maximum Receive Unit Greater Than 1492 in the Point-to-Point Protocol over Ethernet

Overview

RFC 4638, “Accommodating a Maximum Transit Unit/Maximum Receive Unit Greater Than 1492 in the Point-to-Point Protocol over Ethernet”, is an Informational document published in September 2006 by P. Arberg, D. Kourkouzelis, M. Duckett, T. Anschutz, J. Moisand. The canonical text is published by the RFC Editor.

Abstract

The Point-to-Point Protocol over Ethernet (PPPoE), as described in RFC 2516, mandates a maximum negotiated Maximum Receive Unit (MRU) of 1492. This document outlines a solution that relaxes this restriction and allows a maximum negotiated MRU greater than 1492 to minimize fragmentation in next-generation broadband networks. This memo provides information for the Internet community.

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

What “Informational” means

Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.

Read this RFC

The canonical text of RFC 4638 is hosted at rfc-editor.org. Available in TXT,HTML.

Other RFCs from 2006

Who Is Online

In total there are 184 users online: 0 registered, 177 guests and 7 bots.

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

Bots: AhrefsBot Applebot Baiduspider Facebook Other Bot Other Crawler SemrushBot

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