Router Configs

• RANCID, the Really Awesome New Cisco confIg Differ. Uses CVS to monitor a router's (or device's) configuration, including software and hardware (cards, serial numbers, etc). Currently supports Bay routers, Cisco routers, Juniper routers, Catalyst switches, Foundry switches, Redback NASs, ADC EZT3 muxes, MRTd (and thus likely IRRd), Alteon switches, and HP procurve switches. See also the NANOG29 router config presentation.
• tool, written by Danny McPherson and Aaron Klink, provides multi-vendor support for config audits, mass configuration tasks, and basic monitoring with self-defined triggers. Available from SourceForge. See also the NANOG29 router config presentation.

Statistics and Visualization

• CAIDA Measurement Tool Taxonomy
  Comprehensive collection of links to Internet and TCP/IP performance measurement tools and efforts.
• Mapnet
  CAIDA tool that permits visualization of the infrastructure of multiple backbone providers simulaneously.
• The University of Oregon's Route Views Project provides comprehensive, real-time information about the global routing system.
• RIPE's Routing Information Service collects BGP data via Remote Route Collectors at different locations around the world, and integrates this information into a comprehensive view of routing in the Internet.
• The famous daily CIDR Report, created by Tony Bates, revised and maintained by Philip Smith and Geoff Huston.
• Internet Traffic Report
  Global traffic visualizations from the Andover News Network.

Looking Glass Sites

Publicly available routers for viewing routing tables and exploring routing in the Internet.

Traceroute

• traceroute.org
  Country-by-country traceroute service.
• CAIDA's pointers to reverse traceroute and looking glass servers (Includes clickable map)
• GTrace, a graphical traceroute from CAIDA.

Even More Tools

• The TCP-Friendly Website
  From the Pittsburgh Supercomputing Center, this comprehensive site summarizes recent work on congestion control algorithms for non-TCP based applications.
• Treno, a transport layer performance tool for diagnosing internet congestion. Developed by Matt Matthis of the PSC.
• GEEKTOOLS
  Spam tools, whois, traceroute, RFCs, and more.
• Gconfig
  Free, open-source router configuration and networking toolkit written in Python.
• Tree
  A program designed to allocate 'growable' blocks of IP addresses. Available from ftp://ftp.isi.edu/ra/tools/tree-2.1.5.tar.Z
• IPv6 BGP Operational Report from TILAB.
• cflowd
  From Daniel McRobb of CAIDA, a flow analysis tool currently used for analyzing Cisco's NetFlow enabled switching method.

Maps

• Russ Haynal's ISP Page
  Maps of many ISP backbones.
• Martin Dodge's Atlas of Cyberspace
  Maps of many international ISP backbones.