Metropolitan Area Network June 13, 2006

1. Metropolitan Area Network June 13, 2006 Presented by: Tim Ryan Network Manager tryan@ccsf.edu

2. City College of San FranciscoTechnology Overview • Information Technology Environment: • 5,000 Desktop Computers • 200 Switches and Routers • Wireless LAN Access on Multiple Campuses • Alcatel Voice over IP Telephone System, Approximately 2,000 Phones • PictureTel VideoConferencing Systems Using Video over IP • 100Mbps Internet Access • 1000Mbps Internet2 Access • Fiber-Based Metro Area Network • Seven Campuses Currently Connected • Two Additional Pending Construction (Mission, Chinatown) • 1000Mbps Shared Intercampus Network • Additional Capacity Available for Future Growth

3. Metro Area Network Initiative • Metro Area Network Goals: • Connect All Major Campuses With Fiber-Optic Infrastructure • Provide Scalability for Future Growth with Easily Maintained Components • Ensure Compatibility with Other Colleges and Universities • Completed Feasibility Study in 2002 • Hired Optical Networking Consultant in 2003: Photisis Consulting • Selected Core Technology: Gigabit Ethernet • Documented Existing San Francisco Commercial Fiber Plant • Issued Commercial RFP for Fiber Installation and Lease • Determined Municipal Partnership was a Preferred Solution • Established Fiber Routing and Technical Criteria • Received Funding Approval from Board of Trustees ($3.5M) • See www.ccsf.edu/board Then Archives:June 2004:Resolution B11 • Finalized Partnership Contract with City & County of San Francisco • Department of Telecommunications and Information Services (DTIS)

4. City College & CENIC Partnership • CENIC: Corporation for Education Network Initiatives in California • A Not-For-Profit Corporation Serving: • University of California (9 Campuses) • California State University (23 Campuses) • California Community Colleges (109 Campuses) • Cal Tech, USC, Stanford • Statewide K-12 System • Coordinate Development, Deployment and Operation of Network Services • See www.cenic.org • Then Network:Network Operations:Usage Graphs:Utilization • Developed State-Wide Optical Network Architecture • Provided a Model for City College Network Architecture • Presented Honorable Mention Award to City College in 2003

5. City College Internet Usage Graph

6. Metro Area Network - Physical Fiber Path

7. Production Ring Design

8. Production Ring – Projected Optical Link Loss

9. Internet Ring Design

10. Internet Ring – Projected Optical Link Loss

11. Ethernet Equipment Details HP ProCurve Networking Switch 5304xl HP ProCurve Switch xl Mini-GBIC Module HP ProCurve Gigabit-LX-LC Mini-GBIC

12. Ethernet Equipment Parts List

13. Metro Area Network Applications & Benefits • Transport Internet Access to/from CENIC Communications Hub • Carry Internal Voice-over-IP Telephone Traffic Between Campuses • Enable Distance Learning Between Campuses and Colleges • Provide Video-on-Demand Services to Classrooms • Provide Increased Bandwidth for Online Courses • Enable Scalability to Meet Future Communication Needs • Provide Predictability and Control Over Cost of Communication Services • Maintain Infrastructure With Existing Engineering Staff and Skill Sets • Achieve Significant Cost Savings Versus Leased Services • Approximately $1 Million Over 20-Year Period

14. Metro Area Network Academic & Industry Cooperation • Provide Hands-On Learning Environment For Computer Networking Department • Dedicate Fiber Strands for Student Experimentation and Testing • Expand Cisco Academy to Include Optical Networking • Provide Metro-Area Connectivity to Local Non-Profit Organizations • Provide Test Environment for Communications Equipment Vendors • Provide Test Environment for Metro Area Service Providers • Apply Techniques and Procedures Developed by National LambdaRail • Apply Standards Developed by Metro Ethernet Forum (MEF) • Distribute Project Findings and Test Results via Forums Such as IEEE • “A Cooperative Academic and Municipal Metro Area Network” April, 2004 • References: • “Metro Ethernet” by Sam Halabi, Cisco Press • “Ethernet-Based Metro Area Networks” by Daniel Minoli, McGraw-Hill

15. Metro Area Network Layer 2 Operational Details • Ring Design Implies Redundant Data Paths • Spanning-Tree Protocol Prevents Data Loops, Establishes One Active Path • Spanning-Tree Protocol (IEEE 802.1D) Restoration Time = 45 Seconds • Rapid Spanning Tree Protocol (IEEE 802.1w) Restoration Time = 1 Second • Port States = Forwarding, Blocking, Listening, Learning • Ocean Campus Switch Designated as Root Bridge • Alemany Campus Switch Has Highest Path Cost, Port A2 in Blocking State • Testing to Date: Ring Restoration Time Approximately 1 to 2 Seconds • Data IP Sessions Remained Active, No Noticeable Impact • Some Voice Sessions Dropped, No Obvious Pattern • Additional Tuning and Testing Required to Retain all Voice/Data Sessions

16. Metro Area Network Spanning-Tree Example ALE11R1H5# sho span Rapid Spanning Tree (RSTP) Information STP Enabled : Yes Force Version : RSTP-operation Switch Priority : 32768 Hello Time : 2 Max Age : 20 Forward Delay : 15 Topology Change Count : 676 Time Since Last Change : 19 days Root MAC Address : 000f20-ef5e00 Root Path Cost : 80000 Root Port : A1 Root Priority : 4096 Port Type Cost Priority State | Designated Bridge ---- --------- --------- -------- ---------- + ----------------- A1 1000LX 20000 128 Forwarding | 000f20-ef2700 A2 1000LX 20000 128 Blocking | 000f20-ef4600 A3 1000SX 20000 128 Disabled | A4 1000SX 20000 128 Disabled | B1 1000SX 20000 128 Forwarding | 000f20-ef2300 B2 1000SX 20000 128 Forwarding | 000f20-ef2300 B3 1000SX 20000 128 Forwarding | 000f20-ef2300 B4 1000SX 2000000 128 Disabled |