TCP Extended Statistics MIB - Status page


This draft describes extended performance statistics for TCP. They are designed to use TCP's ideal vantage point to diagnose performance problems in both the network and the application. If a network based application is performing poorly, TCP can determine if the bottleneck is in the sender, the receiver or the network itself. If the bottleneck is in the network, TCP can provide specific information about its nature.

Please get the most up-to-date date TCP-ESTATS-MIB here: [live draft]
[the already out of date IETF draft] [live draft with change bars since the IETF draft]
[live draft with change bars since the prior IETF draft]

NOTE: We just completed a fairly substantial restructuring of this draft. Unfortunately a number of nits got through, but we are grooming this draft for last call, RealSoonNow. The rest of this page is currently out of date.

Process and Current Goals

We are restructuring the prior ESTATS document to incorporated the good transport work that was done by the IPv6 team and later determined to be out of scope. We will have a new draft before the IETF ID cutoff (9 AM Monday March 3rd) that will address most of the open issues.

The best description of the process history is in the previous version of this status page.

If you want to be included in the design team, drop a note to Peter O'Neil <> and we will add you to the list.

Technical Background

The web100 project has implemented TCP kernel instrumentation that approximates this MIB. The web100 instruments are exported via the Linux proc interface (not SNMP), and are differ slightly from this draft. Glen Turner is building a real SNMP agent to access the web100 kernel instruments.

Document restructure plans

These were worked out by Rajiv Raghunarayan (who was already working on the IPv6 update to RFC2012) and Matt Mathis.

Open Technical Issues


[TCP-ESTATS-MIB] Matt Mathis, John Heffner, Raghu Reddy, J. Saperia, "TCP Extended Statistics MIB", work in progress.
[RFC2012] McCloghrie, K., "SNMPv2 Management Information Base for the Transmission Control Protocol using SMIv2", RFC 2012, November 1996.
[RFC2012bis] Bill Fenner, et al, "Management Information Base for the Transmission Control Protocol (TCP)" Internet-Draft draft-ietf- draft-ietf-ipv6-rfc2012-update-00.txt, expires Dec 2002

This page should be referenced at Drafts of this page (and the ID itself) are staged at, where they are updated in real time.

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This document is a product of the web100 project.