RFC 5556 · INFORMATIONAL · 2009

Transparent Interconnection of Lots of Links : Problem and Applicability Statement

Overview

RFC 5556, “Transparent Interconnection of Lots of Links : Problem and Applicability Statement”, is an Informational document published in May 2009 by J. Touch, R. Perlman. The canonical text is published by the RFC Editor.

Abstract

Current IEEE 802.1 LANs use spanning tree protocols that have a number of challenges. These protocols need to strictly avoid loops, even temporary ones, during route propagation, because of the lack of header loop detection support. Routing tends not to take full advantage of alternate paths, or even non-overlapping pairwise paths (in the case of spanning trees). This document addresses these concerns and suggests applying modern network-layer routing protocols at the link layer. This document assumes that solutions would not address issues of scalability beyond that of existing IEEE 802.1 bridged links, but that a solution would be backward compatible with 802.1, including hubs, bridges, and their existing plug-and-play capabilities. 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 5556 is hosted at rfc-editor.org. Available in TXT,HTML.

Other RFCs from 2009

Who Is Online

In total there are 32 users online: 0 registered, 27 guests and 5 bots.

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

Bots: AhrefsBot Applebot Other Bot Other Crawler SemrushBot

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