Encyclopedia Archive

SDN

2016-01-15/in /by Wolfgang Riedel

Software Defined Networking

The Promise of OF/SDN had been “Decoupling Policy from Configuration”

SDN

selector-id

2016-06-30/in RFC6759 /by Wolfgang Riedel

Application ID app-id:<engine-id>/<selector-id>

Application ID is an ID exported by AVC which explains to what application a particular flow belongs to.

The numeric application ID is specified using http://www.rfc-editor.org/rfc/rfc6759.txt format. This RFC specifies the application ID model used in Cisco AVC. In this model the application ID is divided into an Engine ID and a Selector ID.

Application-ID is divided into a Selector ID and Engine ID separated by a slash
Selector-ID is encoded as a simple numeric value between <1-65535>
Engine-ID is encoded as either a textual representation or a number

Selector ID—The remaining 24 bits that provide information about the application.

SPDY

2016-02-01/in Protocol Evolution /by Wolfgang Riedel

SPDY

SPDY is an experiment with protocols for the web. Its goal is to reduce the latency of web pages.

Documentation
- SPDY: An experimental protocol for a faster web
- SPDY protocol specification
  - Server Push and Server Hint
- Research
  - An Argument For Changing TCP Slow Start – Mike Belshe 01/11/10
  - More Bandwidth Doesn’t Matter (much) – Mike Belshe 04/08/10
- Standards Work
  - SSL Next-Protocol-Negotiation Extension – Adam Langley 01/20/10
  - TLS False Start – Langley, Modadugu, Mueller 06/2010
  - TLS Snap Start – Adam Langley 06/18/2010
- SPDY Proxy Design
- SPDY Proxy Examples
- SPDY Server and Proxy Authentication
Code
- Chromium client implementation: http://src.chromium.org/viewvc/chrome/trunk/src/net/spdy/
- Server tools: http://src.chromium.org/viewvc/chrome/trunk/src/net/tools/flip_server/
  - Running flip_in_mem_edsm_server
Discuss
- http://groups.google.com/group/spdy-dev
External work
- Servers
  - Jetty Web Server: http://wiki.eclipse.org/Jetty/Feature/SPDY
  - Apache module for SPDY: http://code.google.com/p/mod-spdy/
  - Python implementation of a SPDY server: http://github.com/mnot/nbhttp/tree/spdy
  - Ruby SPDY: https://github.com/igrigorik/spdy
  - node.js SPDY: https://github.com/indutny/node-spdy
- Libraries
  - Netty SPDY (Java library): http://netty.io/blog/2012/02/04/
  - Ruby wrapper around Chromium SPDY framer: https://github.com/romanbsd/spdy
  - Go SPDY: http://godoc.org/code.google.com/p/go.net/spdy
  - Erlang SPDY: https://github.com/RJ/erlang-spdy
  - Java SPDY: http://svn.apache.org/repos/asf/tomcat/trunk/modules/tomcat-lite
  - C SPDY (libspdy): http://libspdy.org/index.html (to be used by libcurl: http://daniel.haxx.se/blog/2011/10/18/libspdy/)
  - C SPDY (spindly): https://github.com/bagder/spindly
  - C SPDY (spdylay): https://github.com/tatsuhiro-t/spdylay
  - iPhone SPDY: https://github.com/sorced-jim/SPDY-for-iPhone
- Browsers
  - Google Chrome
  - Mozilla Firefox
Tools
- Summary of SPDY tools
- Chrome page benchmarking tool