ToDo

The outline of topics we’d like to address more fully is below:

Demonstration recipes for demonstrating/testing for bufferbloat

• Servers
• Home routers
• Wifi routers
• Wifi clients
• Ethernet
• Broadband gear
• Core internet
• 3G wireless

Mitigations

• Set end-node transmit buffers to something sane
• Set QOS knobs on routers to keep broadband gear’s buffer from filling.

Full Solutions

• Fixes for routers involve AQM of some sort - Van’s modified RED (or similar) is really necessary in wireless situations, as classic RED isn’t easily dynamic, though one could kludge it, of course
• Proper solutions for end-nodes involve some intelligence in buffering; at a minimum control of transmit buffers and device rings.

Testing tools

• The ICSI netalyzr
• Measurement Lab Tools
• Speedtest.net
• DSL Reports Smokeping Page
• Smokeping
• httping - latest version has support for persistent connections, and therefore it is easy to test against any web server over TCP, to defuse the (overblown) issues around ICMP ping. Also available now in the Android marketplace.

Needed tools

• a “push here to make your network become loaded” test, to drive this home to people
• a tool like pingplotter for Linux and Mac (at least), to help identify bloated links. This might be an elaboration of mtr:http://www.bitwizard.nl/mtr/ that works properly.
• For super, duper extra bonus points, a tool that uses the techniques of reverse traceroute to identify problems on the reverse path, since many/most paths in the Internet are asymmetric

Papers

• Netalyzr: Illuminating Edge Network Neutrality, Security, and Performance, by Kreibich, Weaver, Nechaev, and Paxson
• Understanding broadband speed measurements, by Bauer, Clark and Lehr
• RED in a Different Light, by V. Jacobson, K. Nichols, K. Poduri
• Cable Modem Buffer Management in DOCSIS Networks, by Martin, Westall, Shaw, White, Woundy, Finklestein, & Hart

Datasets

• M-Labs datasets

Experiments

• Jim Gettys experiments

Presentations

• A Rant on Queues, Van Jacobson, 2006
• We have Met the Enemy and [S/]He is Us: A View of Internet Research and Analysis, Kathleen Nichols
• Bufferbloat - Dark Buffers in the Internet Mp3 audio
• Bufferbloat FAQ

Historical data/papers of interest

• HTTP performance - 1997
• TCP Performance problems caused by interaction between Nagle’s Algorithm and Delayed ACK 2005

Test equipment

• Gigabit port mirroring switch

Dave Taht’s to-do list:

• Myths
• Controversies
• Conferences
• Linux Traffic Shapers
• Device Driver Buffering
• Linux Patches
• Linux Tips
• Mac Tips
• Windows Tips
• IPv6
• Glossary Dark Buffers Latency RTT TXQUEUELEN DMA_TX_QUEUE spiky latency
• Experiments
• Equations
• Qdiscs
• Papers
• Mitigations
• Dogfood Principle
• Good blog discussions
• What (bad) stuff happens on a congested network?
• Mesh Networks
• Talks
• Experts
• Quotes
• SACK hall of Fame SACK hall of Shame
• ECN Hall of Fame ECN hall of Shame
• dtaht tasks
• humor
• Gettys blogs reformatted
  Mitigations and Solutions Mitigations and solutions for Broadband Mitigations and solutions for Wireless Mitigations and Solutions for Home Gateways