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[the already out of date IETF draft] [live draft with change bars since the IETF draft]

NOTE: This page is current as of June 2004 (2 months prior to IETF 60).

Process and Current Goals

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.

Open Issues

We are tracking open and closed issues in annotated text files.


[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-04.txt, expires March 2004.

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

Prior versions of this page:

Please send comments and suggestions to

This document is a product of the web100 project.