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Network Registration & Bandwidth Management Gary Holeman Ken Johnson Tim Medin LeTourneau Internet Bandwidth History • • • • 1998 – 1.5 Megabit/sec shared with 5 institutions, very unreliable 2000 – 1.5 Megabit/sec dedicated, commercial provider 2002 – 3.0 Megabit/sec dedicated, commercial provider August 2004 – 6.0 Megabit/sec dedicated, two commercial providers, Autonomous System Number (ASN) belongs to LeTourneau, Border Gateway Protocol (BGP) Routing to balance load between providers and provide fault tolerance • March 2005 – 9.0 Megabit/sec dedicated, two commercial providers • June 2005 – 21 Megabit/sec on a full SONET fiber ring both to the campus and on the campus, providing protection from fiber cuts, both on the campus and within Longview. 3 Megabit/sec with secondary provider for fault tolerance. • July 2006 – Expanding to 45 Megabit/sec on the SONET ring, with two different sources LETU Internet Bandwidth 50 45 40 35 30 Mbit/sec 25 20 15 10 5 0 1998 1999 2000 2001 2002 Year 2003 2004 2005 2006 Assumption • It will not be possible to control the growth in bandwidth use without individual responsibility and accountability. Background • Background • Problems –Virus Containment • Outbreak in Fall 2004 –Difficult to Quarantine –No Direct Policy Notification Requirements • • • • • Quarantine Trust Registered Computers Track Usage Force DNS Naming Security Levels Registration Solutions • NetReg –Tested & Stable –Moderate Support –Security Only at Boot –No VLAN Support Decision: Not Secure Enough Registration Solutions • Commercial Software –Dedicated Support –Stable –Very Expensive Decision: Too Expensive Bandwidth Management Solutions • Commercial Software –Stable –Ramping –Expensive –Support Decision: Implementation Failed Registration Solutions • Custom Solution –Monetarily “Cheap” –Customizable –Development Time Citadel is Born Citadel Registration Process Connect to Network Redirect to Validate Registration Username, MAC, and Page Hostname Agree to Policies & Submit Move VLAN Wait for New IP Citadel SNMP Link Up Trap Link Up Move VLAN Query Switch Link Life Cycle SNMP Link Down Trap Link Down Lookup MAC Move VLAN Citadel Bandwidth Logging Query PacketShaper Translate IP to MAC Lookup User Log Data Move VLAN (Over Limit) Wait next interval Components Citadel Watchtower Garrison Keep Emissary Herald SNMP Trap Handling Move VLANs Management (Web) Bandwidth Management Messaging Security Levels & VLANs Untrusted Student Faculty/Staff Voice Admin Special Management Management Management Management Managment Management Results • • • • No Virus Outbreaks Faster & Better Tracking Easier Network Troubleshooting Better Communication Implementation Steps • Fall 2005 – Announced future bandwidth allocation to student • January 2006 – FAQ with limits and costs provided to students • January 2006 – bandwidth detail pages available to students • Student newspaper articles, student IT committee meetings • May 2006 – Limits and costs in place Costs and Limits Internet usage limit Monthly Fee < 3 GB/month Free 3 - 10 GB/month $25 10 - 30 GB/month $40 30 - 50 GB/month $60 50 - 120 GB/month $100 Questions? Thank You